diff --git a/code/__DEFINES/reagents.dm b/code/__DEFINES/reagents.dm
index 174289d3bb..36ea64de2c 100644
--- a/code/__DEFINES/reagents.dm
+++ b/code/__DEFINES/reagents.dm
@@ -34,3 +34,17 @@
 #define DEL_REAGENT		1	// reagent deleted (fully cleared)
 #define ADD_REAGENT		2	// reagent added
 #define REM_REAGENT		3	// reagent removed (may still exist)
+
+//reagent bitflags, used for altering how they works
+#define REAGENT_DEAD_PROCESS		(1<<0)	//calls on_mob_dead() if present in a dead body
+#define REAGENT_DONOTSPLIT			(1<<1)	//Do not split the chem at all during processing
+#define REAGENT_ONLYINVERSE			(1<<2)	//Only invert chem, no splitting
+#define REAGENT_ONMOBMERGE			(1<<3)	//Call on_mob_life proc when reagents are merging.
+#define REAGENT_INVISIBLE			(1<<4)	//Doesn't appear on handheld health analyzers.
+#define REAGENT_FORCEONNEW			(1<<5)  //Forces a on_new() call without a data overhead
+#define REAGENT_SNEAKYNAME          (1<<6)  //When inverted, the inverted chem uses the name of the original chem
+#define REAGENT_SPLITRETAINVOL      (1<<7)  //Retains initial volume of chem when splitting
+
+//Chemical reaction flags, for determining reaction specialties
+#define REACTION_CLEAR_IMPURE       (1<<0)  //Convert into impure/pure on reaction completion
+#define REACTION_CLEAR_INVERSE      (1<<1)  //Convert into inverse on reaction completion when purity is low enough
diff --git a/code/_globalvars/bitfields.dm b/code/_globalvars/bitfields.dm
index 5503d9e9ee..755105dc27 100644
--- a/code/_globalvars/bitfields.dm
+++ b/code/_globalvars/bitfields.dm
@@ -172,12 +172,26 @@ GLOBAL_LIST_INIT(bitfields, list(
 	"rad_flags" = list(
 		"RAD_PROTECT_CONTENTS" = RAD_PROTECT_CONTENTS,
 		"RAD_NO_CONTAMINATE" = RAD_NO_CONTAMINATE,
-	),
+		),
 	"disease_flags" = list(
 		"CURABLE" = CURABLE,
 		"CAN_CARRY"	= CAN_CARRY,
 		"CAN_RESIST" = CAN_RESIST
-	),
+		),
+	"chemical_flags" = list(
+		"REAGENT_DEAD_PROCESS" = REAGENT_DEAD_PROCESS,
+		"REAGENT_DONOTSPLIT" = REAGENT_DONOTSPLIT,
+		"REAGENT_ONLYINVERSE" = REAGENT_ONLYINVERSE,
+		"REAGENT_ONMOBMERGE" = REAGENT_ONMOBMERGE,
+		"REAGENT_INVISIBLE" = REAGENT_INVISIBLE,
+		"REAGENT_FORCEONNEW" = REAGENT_FORCEONNEW,
+		"REAGENT_SNEAKYNAME" = REAGENT_SNEAKYNAME,
+		"REAGENT_SPLITRETAINVOL" = REAGENT_SPLITRETAINVOL
+		),
+	"clear_conversion" = list(
+		"REACTION_CLEAR_IMPURE"  = REACTION_CLEAR_IMPURE,
+		"REACTION_CLEAR_INVERSE" = REACTION_CLEAR_INVERSE
+	    ),
 	"organ_flags" = list(
 		"ORGAN_SYNTHETIC" = ORGAN_SYNTHETIC,
 		"ORGAN_FROZEN" = ORGAN_FROZEN,
@@ -185,5 +199,5 @@ GLOBAL_LIST_INIT(bitfields, list(
 		"ORGAN_EXTERNAL" = ORGAN_EXTERNAL,
 		"ORGAN_VITAL" = ORGAN_VITAL,
 		"ORGAN_NO_SPOIL" = ORGAN_NO_SPOIL
-	),
-	))
+		),
+		))
diff --git a/code/game/objects/items/devices/scanners.dm b/code/game/objects/items/devices/scanners.dm
index 21cd782979..7655654f78 100644
--- a/code/game/objects/items/devices/scanners.dm
+++ b/code/game/objects/items/devices/scanners.dm
@@ -441,7 +441,7 @@ SLIME SCANNER
 			if(M.reagents.reagent_list.len)
 				var/list/datum/reagent/reagents = list()
 				for(var/datum/reagent/R in M.reagents.reagent_list)
-					if(R.invisible)
+					if(R.chemical_flags & REAGENT_INVISIBLE)
 						continue
 					reagents += R
 
@@ -460,6 +460,21 @@ SLIME SCANNER
 					msg += "<span class='danger'>[R.name]</span>\n"
 			else
 				msg += "<span class='notice'>Subject is not addicted to any reagents.</span>\n"
+
+			if(M.reagents.has_reagent("fermiTox"))
+				var/datum/reagent/fermiTox = M.reagents.has_reagent("fermiTox")
+				switch(fermiTox.volume)
+					if(5 to 10)
+						msg += "<span class='notice'>Subject contains a low amount of toxic isomers.</span>\n"
+					if(10 to 25)
+						msg += "<span class='danger'>Subject contains toxic isomers.</span>\n"
+					if(25 to 50)
+						msg += "<span class='danger'>Subject contains a substantial amount of toxic isomers.</span>\n"
+					if(50 to 95)
+						msg += "<span class='danger'>Subject contains a high amount of toxic isomers.</span>\n"
+					if(95 to INFINITY)
+						msg += "<span class='danger'>Subject contains a extremely dangerous amount of toxic isomers.</span>\n"
+
 			msg += "*---------*</span>"
 			to_chat(user, msg)
 
diff --git a/code/modules/food_and_drinks/recipes/drinks_recipes.dm b/code/modules/food_and_drinks/recipes/drinks_recipes.dm
index 6880260c4c..c83048e4b1 100644
--- a/code/modules/food_and_drinks/recipes/drinks_recipes.dm
+++ b/code/modules/food_and_drinks/recipes/drinks_recipes.dm
@@ -397,13 +397,16 @@
 	FermiChem 			= TRUE//If the chemical uses the Fermichem reaction mechanics
 	FermiExplode 		= FALSE //If the chemical explodes in a special way
 	PurityMin			= 0 //The minimum purity something has to be above, otherwise it explodes.
+	clear_conversion	= REACTION_CLEAR_INVERSE
 
+/*
 /datum/chemical_reaction/neurotoxin/FermiFinish(datum/reagents/holder, var/atom/my_atom)
 	var/datum/reagent/consumable/ethanol/neurotoxin/Nt = locate(/datum/reagent/consumable/ethanol/neurotoxin) in my_atom.reagents.reagent_list
 	var/cached_volume = Nt.volume
 	if(Nt.purity < 0.5)
 		holder.remove_reagent(src.id, cached_volume)
 		holder.add_reagent("neuroweak", cached_volume)
+*/
 
 /datum/chemical_reaction/neurotoxin/FermiExplode(datum/reagents, var/atom/my_atom, volume, temp, pH)//reduced size
 	volume = volume/10
@@ -816,10 +819,10 @@
 	id = "catnip_tea"
 	results = list("catnip_tea" = 3)
 	required_reagents = list("tea" = 5, "catnip" = 2)
-	
+
 /datum/chemical_reaction/commander_and_chief
-	name = "Commander and Chief" 
-	id = "commander_and_chief" 
-	results = list("commander_and_chief" = 50) 
+	name = "Commander and Chief"
+	id = "commander_and_chief"
+	results = list("commander_and_chief" = 50)
 	required_reagents = list("alliescocktail" = 50, "champagne" = 20, "doctorsdelight" = 10, "quintuple_sec" = 10, "screwdrivercocktail" = 10)
-	mix_message = "When your powers combine, I am Captain Pl-..."	
+	mix_message = "When your powers combine, I am Captain Pl-..."
diff --git a/code/modules/mob/living/carbon/life.dm b/code/modules/mob/living/carbon/life.dm
index cdcfeedc80..d1839db2cf 100644
--- a/code/modules/mob/living/carbon/life.dm
+++ b/code/modules/mob/living/carbon/life.dm
@@ -35,6 +35,7 @@
 
 	if(stat == DEAD)
 		stop_sound_channel(CHANNEL_HEARTBEAT)
+		handle_death()
 		rot()
 
 	//Updates the number of stored chemicals for powers
@@ -43,6 +44,12 @@
 	if(stat != DEAD)
 		return 1
 
+//Procs called while dead
+/mob/living/carbon/proc/handle_death()
+	for(var/datum/reagent/R in reagents.reagent_list)
+		if(R.chemical_flags & REAGENT_DEAD_PROCESS)
+			R.on_mob_dead(src)
+
 ///////////////
 // BREATHING //
 ///////////////
diff --git a/code/modules/reagents/chemistry/fermi/readme.md b/code/modules/reagents/chemistry/fermi/readme.md
new file mode 100644
index 0000000000..4b897b6c4b
--- /dev/null
+++ b/code/modules/reagents/chemistry/fermi/readme.md
@@ -0,0 +1,23 @@
+How to code fermichem reactions:
+First off, probably read though the readme for standard reagent mechanisms, this builds on top of that.
+
+#bitflags
+for `datum/reagent/` you have the following options with `var/chemical_flags`:
+
+```
+REAGENT_DEAD_PROCESS		calls on_mob_dead() if present in a dead body
+REAGENT_DONOTSPLIT		    Do not split the chem at all during processing
+REAGENT_ONLYINVERSE		    Only invert chem, no splitting
+REAGENT_ONMOBMERGE		    Call on_mob_life proc when reagents are merging.
+REAGENT_INVISIBLE		    Doesn't appear on handheld health analyzers.
+REAGENT_FORCEONNEW		    Forces a on_new() call without a data overhead
+REAGENT_SNEAKYNAME          When inverted, the inverted chem uses the name of the original chem
+REAGENT_SPLITRETAINVOL      Retains initial volume of chem when splitting
+```
+
+for `datum/chemical_reaction/` under `var/clear_conversion`
+
+```
+REACTION_CLEAR_IMPURE       Convert into impure/pure on reaction completion
+REACTION_CLEAR_INVERSE      Convert into inverse on reaction completion when purity is low enough
+```
diff --git a/code/modules/reagents/chemistry/holder.dm b/code/modules/reagents/chemistry/holder.dm
index d87a9f0ece..1be30301ec 100644
--- a/code/modules/reagents/chemistry/holder.dm
+++ b/code/modules/reagents/chemistry/holder.dm
@@ -466,7 +466,7 @@
 
 			if (C.FermiChem == TRUE && !continue_reacting)
 				if (chem_temp > C.ExplodeTemp) //This is first to ensure explosions.
-					var/datum/chemical_reaction/fermi/Ferm = selected_reaction
+					var/datum/chemical_reaction/Ferm = selected_reaction
 					fermiIsReacting = FALSE
 					SSblackbox.record_feedback("tally", "fermi_chem", 1, ("[Ferm] explosion"))
 					Ferm.FermiExplode(src, my_atom, volume = total_volume, temp = chem_temp, pH = pH)
@@ -544,7 +544,7 @@
 	return 0
 
 /datum/reagents/process()
-	var/datum/chemical_reaction/fermi/C = fermiReactID
+	var/datum/chemical_reaction/C = fermiReactID
 
 	var/list/cached_required_reagents = C.required_reagents//update reagents list
 	var/list/cached_results = C.results//resultant chemical list
@@ -580,16 +580,16 @@
 		return
 
 /datum/reagents/proc/fermiEnd()
-	var/datum/chemical_reaction/fermi/C = fermiReactID
+	var/datum/chemical_reaction/C = fermiReactID
 	STOP_PROCESSING(SSprocessing, src)
 	fermiIsReacting = FALSE
-	reactedVol = 0
-	targetVol = 0
 	//pH check, handled at the end to reduce calls.
 	if(istype(my_atom, /obj/item/reagent_containers))
 		var/obj/item/reagent_containers/RC = my_atom
 		RC.pH_check()
-	C.FermiFinish(src, my_atom)
+	C.FermiFinish(src, my_atom, reactedVol)
+	reactedVol = 0
+	targetVol = 0
 	handle_reactions()
 	update_total()
 	//Reaction sounds and words
@@ -600,7 +600,7 @@
 		to_chat(M, "<span class='notice'>[iconhtml] [C.mix_message]</span>")
 
 /datum/reagents/proc/fermiReact(selected_reaction, cached_temp, cached_pH, reactedVol, targetVol, cached_required_reagents, cached_results, multiplier)
-	var/datum/chemical_reaction/fermi/C = selected_reaction
+	var/datum/chemical_reaction/C = selected_reaction
 	var/deltaT = 0
 	var/deltapH = 0
 	var/stepChemAmmount = 0
@@ -709,7 +709,7 @@
 	return (reactedVol)
 
 //Currently calculates it irrespective of required reagents at the start
-/datum/reagents/proc/reactant_purity(var/datum/chemical_reaction/fermi/C, holder)
+/datum/reagents/proc/reactant_purity(var/datum/chemical_reaction/C, holder)
 	var/list/cached_reagents = reagent_list
 	var/i = 0
 	var/cachedPurity
@@ -719,6 +719,14 @@
 			i++
 	return cachedPurity/i
 
+/datum/reagents/proc/uncache_purity(id)
+	var/datum/reagent/R = has_reagent("[id]")
+	if(!R)
+		return
+	if(R.cached_purity == 1)
+		return
+	R.purity = R.cached_purity
+
 /datum/reagents/proc/isolate_reagent(reagent)
 	var/list/cached_reagents = reagent_list
 	for(var/_reagent in cached_reagents)
@@ -893,10 +901,8 @@
 			if(my_atom)
 				my_atom.on_reagent_change(ADD_REAGENT)
 			if(isliving(my_atom))
-				if(R.OnMobMergeCheck == TRUE)//Forces on_mob_add proc when a chem is merged
+				if(R.chemical_flags & REAGENT_ONMOBMERGE)//Forces on_mob_add proc when a chem is merged
 					R.on_mob_add(my_atom, amount)
-				//else
-				//	R.on_merge(data, amount, my_atom, other_purity)
 			R.on_merge(data, amount, my_atom, other_purity)
 			if(!no_react)
 				handle_reactions()
@@ -914,7 +920,7 @@
 	if(data)
 		R.data = data
 		R.on_new(data)
-	if(R.addProc == TRUE)//Allows on new without data overhead.
+	if(R.chemical_flags & REAGENT_FORCEONNEW)//Allows on new without data overhead.
 		R.on_new(pH) //Add more as desired.
 
 
diff --git a/code/modules/reagents/chemistry/machinery/chem_master.dm b/code/modules/reagents/chemistry/machinery/chem_master.dm
index 85cf5e5011..96aa0901e0 100644
--- a/code/modules/reagents/chemistry/machinery/chem_master.dm
+++ b/code/modules/reagents/chemistry/machinery/chem_master.dm
@@ -405,7 +405,7 @@
 
 					if(!targetReagent)
 						CRASH("Tried to find a reagent that doesn't exist in the chem_master!")
-					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold), "purityF" = targetReagent.purity, "inverseRatioF" = initial(R.InverseChemVal), "purityE" = initial(Rcr.PurityMin), "minTemp" = initial(Rcr.OptimalTempMin), "maxTemp" = initial(Rcr.OptimalTempMax), "eTemp" = initial(Rcr.ExplodeTemp), "pHpeak" = pHpeakCache)
+					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold), "purityF" = targetReagent.purity, "inverseRatioF" = initial(R.inverse_chem_val), "purityE" = initial(Rcr.PurityMin), "minTemp" = initial(Rcr.OptimalTempMin), "maxTemp" = initial(Rcr.OptimalTempMax), "eTemp" = initial(Rcr.ExplodeTemp), "pHpeak" = pHpeakCache)
 				else
 					fermianalyze = FALSE
 					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold))
@@ -432,7 +432,7 @@
 
 					if(!targetReagent)
 						CRASH("Tried to find a reagent that doesn't exist in the chem_master!")
-					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold), "purityF" = targetReagent.purity, "inverseRatioF" = initial(R.InverseChemVal), "purityE" = initial(Rcr.PurityMin), "minTemp" = initial(Rcr.OptimalTempMin), "maxTemp" = initial(Rcr.OptimalTempMax), "eTemp" = initial(Rcr.ExplodeTemp), "pHpeak" = pHpeakCache)
+					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold), "purityF" = targetReagent.purity, "inverseRatioF" = initial(R.inverse_chem_val), "purityE" = initial(Rcr.PurityMin), "minTemp" = initial(Rcr.OptimalTempMin), "maxTemp" = initial(Rcr.OptimalTempMax), "eTemp" = initial(Rcr.ExplodeTemp), "pHpeak" = pHpeakCache)
 				else
 					fermianalyze = FALSE
 					analyzeVars = list("name" = initial(R.name), "state" = state, "color" = initial(R.color), "description" = initial(R.description), "metaRate" = T, "overD" = initial(R.overdose_threshold), "addicD" = initial(R.addiction_threshold))
diff --git a/code/modules/reagents/chemistry/reagents.dm b/code/modules/reagents/chemistry/reagents.dm
index 520148848c..52d3ba7822 100644
--- a/code/modules/reagents/chemistry/reagents.dm
+++ b/code/modules/reagents/chemistry/reagents.dm
@@ -32,20 +32,18 @@
 	var/addiction_stage3_end = 30
 	var/addiction_stage4_end = 40
 	var/overdosed = 0 // You fucked up and this is now triggering its overdose effects, purge that shit quick.
-	var/self_consuming = FALSE
-	var/metabolizing 		= FALSE
-	var/invisible			= FALSE //Set to true if it doesn't appear on handheld health analyzers.
+	var/self_consuming = FALSE  //I think this uhhh, makes weird stuff happen when metabolising, but... doesn't seem to do what I think, so I'm gonna leave it.
 	//Fermichem vars:
-	var/purity = 1 						//How pure a chemical is from 0 - 1.
-	var/addProc = FALSE 				//If the chemical should force an on_new() call
-	var/turf/loc 			= null 				//Should be the creation location!
+	var/purity 				= 1 		//How pure a chemical is from 0 - 1.
+	var/cached_purity		= 1
+	var/turf/loc = null 				//Should be the creation location!
 	var/pH = 7							//pH of the specific reagent, used for calculating the sum pH of a holder.
-	var/SplitChem			= FALSE		//If the chem splits on metabolism
-	var/ImpureChem 			= "fermiTox"// What chemical is metabolised with an inpure reaction
-	var/InverseChemVal 		= 0.25		// If the impurity is below 0.5, replace ALL of the chem with InverseChem upon metabolising
-	var/InverseChem 		= "fermiTox"// What chem is metabolised when purity is below InverseChemVal, this shouldn't be made, but if it does, well, I guess I'll know about it.
-	var/DoNotSplit			= FALSE		// If impurity is handled within the main chem itself
-	var/OnMobMergeCheck 	= FALSE 	//Call on_mob_life proc when reagents are merging.
+	//var/SplitChem			= FALSE		//If the chem splits on metabolism
+	var/impure_chem						// What chemical is metabolised with an inpure reaction
+	var/inverse_chem_val 		= 0			// If the impurity is below 0.5, replace ALL of the chem with inverse_chemupon metabolising
+	var/inverse_chem					// What chem is metabolised when purity is below inverse_chem_val, this shouldn't be made, but if it does, well, I guess I'll know about it.
+	var/metabolizing = FALSE
+	var/chemical_flags // See fermi/readme.dm REAGENT_DEAD_PROCESS, REAGENT_DONOTSPLIT, REAGENT_ONLYINVERSE, REAGENT_ONMOBMERGE, REAGENT_INVISIBLE, REAGENT_FORCEONNEW, REAGENT_SNEAKYNAME
 
 
 /datum/reagent/Destroy() // This should only be called by the holder, so it's already handled clearing its references
@@ -75,28 +73,47 @@
 		holder.remove_reagent(src.id, metabolization_rate * M.metabolism_efficiency) //By default it slowly disappears.
 	return
 
+//called when a mob processes chems when dead.
+/datum/reagent/proc/on_mob_dead(mob/living/carbon/M)
+	if(!(chemical_flags & REAGENT_DEAD_PROCESS)) //justincase
+		return
+	current_cycle++
+	if(holder)
+		holder.remove_reagent(src.id, metabolization_rate * M.metabolism_efficiency) //By default it slowly disappears.
+	return
+
 // Called when this reagent is first added to a mob
 /datum/reagent/proc/on_mob_add(mob/living/L, amount)
-	if(SplitChem)
-		var/mob/living/carbon/M = L
-		if(!M)
-			return
-		if(purity < 0)
-			CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
-		if (purity == 1 || DoNotSplit == TRUE)
-			log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [id]")
-			return
-		else if (InverseChemVal > purity)//Turns all of a added reagent into the inverse chem
-			M.reagents.remove_reagent(id, amount, FALSE)
-			M.reagents.add_reagent(InverseChem, amount, FALSE, other_purity = 1)
-			log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [InverseChem]")
-			return
-		else
-			var/impureVol = amount * (1 - purity) //turns impure ratio into impure chem
+	if(!iscarbon(L))
+		return
+	var/mob/living/carbon/M = L
+	if (purity == 1)
+		log_game("CHEM: [L] ckey: [L.key] has ingested [volume]u of [id]")
+		return
+	if(cached_purity == 1)
+		cached_purity = purity
+	else if(purity < 0)
+		CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
+	if(chemical_flags & REAGENT_DONOTSPLIT)
+		return
+
+	if ((inverse_chem_val > purity) && (inverse_chem))//Turns all of a added reagent into the inverse chem
+		M.reagents.remove_reagent(id, amount, FALSE)
+		M.reagents.add_reagent(inverse_chem, amount, FALSE, other_purity = 1-cached_purity)
+		var/datum/reagent/R = M.reagents.has_reagent("[inverse_chem]")
+		if(R.chemical_flags & REAGENT_SNEAKYNAME)
+			R.name = name//Negative effects are hidden
+			if(R.chemical_flags & REAGENT_INVISIBLE)
+				R.chemical_flags |= (REAGENT_INVISIBLE)
+		log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [inverse_chem]")
+		return
+	else if (impure_chem)
+		var/impureVol = amount * (1 - purity) //turns impure ratio into impure chem
+		if(!(chemical_flags & REAGENT_SPLITRETAINVOL))
 			M.reagents.remove_reagent(id, (impureVol), FALSE)
-			M.reagents.add_reagent(ImpureChem, impureVol, FALSE, other_purity = 1)
-			log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume - impureVol]u of [id]")
-			log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [ImpureChem]")
+		M.reagents.add_reagent(impure_chem, impureVol, FALSE, other_purity = 1-cached_purity)
+		log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume - impureVol]u of [id]")
+		log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [impure_chem]")
 	return
 
 // Called when this reagent is removed while inside a mob
@@ -120,31 +137,34 @@
 
 // Called when two reagents of the same are mixing.
 /datum/reagent/proc/on_merge(data, amount, mob/living/carbon/M, purity)
-	if(SplitChem)
-		if(!ishuman(M))
-			return
-		if (purity < 0)
-			CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
-		if (purity == 1 || DoNotSplit == TRUE)
-			log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume]u of [id] in themselves")
-			return
-		else if (InverseChemVal > purity)
-			M.reagents.remove_reagent(id, amount, FALSE)
-			M.reagents.add_reagent(InverseChem, amount, FALSE, other_purity = 1)
-			for(var/datum/reagent/fermi/R in M.reagents.reagent_list)
-				if(R.name == "")
-					R.name = name//Negative effects are hidden
-			log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume]u of [InverseChem]")
-			return
-		else
-			var/impureVol = amount * (1 - purity)
+	if(!iscarbon(M))
+		return
+	if (purity == 1)
+		log_game("FERMICHEM: [M] ckey: [M.key] has ingested [volume]u of [id]")
+		return
+	cached_purity = purity //purity SHOULD be precalculated from the add_reagent, update cache.
+	if (purity < 0)
+		CRASH("Purity below 0 for chem: [id], Please let Fermis Know!")
+	if(chemical_flags & REAGENT_DONOTSPLIT)
+		return
+
+	if ((inverse_chem_val > purity) && (inverse_chem)) //INVERT
+		M.reagents.remove_reagent(id, amount, FALSE)
+		M.reagents.add_reagent(inverse_chem, amount, FALSE, other_purity = 1-cached_purity)
+		var/datum/reagent/R = M.reagents.has_reagent("[inverse_chem]")
+		if(R.chemical_flags & REAGENT_SNEAKYNAME)
+			R.name = name//Negative effects are hidden
+			if(R.chemical_flags & REAGENT_INVISIBLE)
+				R.chemical_flags |= (REAGENT_INVISIBLE)
+		log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume]u of [inverse_chem]")
+		return
+	else if (impure_chem) //SPLIT
+		var/impureVol = amount * (1 - purity)
+		if(!(chemical_flags & REAGENT_SPLITRETAINVOL))
 			M.reagents.remove_reagent(id, impureVol, FALSE)
-			M.reagents.add_reagent(ImpureChem, impureVol, FALSE, other_purity = 1)
-			for(var/datum/reagent/fermi/R in M.reagents.reagent_list)
-				if(R.name == "")
-					R.name = name//Negative effects are hidden
-			log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume - impureVol]u of [id]")
-			log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume]u of [ImpureChem]")
+		M.reagents.add_reagent(impure_chem, impureVol, FALSE, other_purity = 1-cached_purity)
+		log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume - impureVol]u of [id]")
+		log_game("FERMICHEM: [M] ckey: [M.key] has merged [volume]u of [impure_chem]")
 	return
 
 /datum/reagent/proc/on_update(atom/A)
diff --git a/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm b/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
index 991da11508..94aca411be 100644
--- a/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/alcohol_reagents.dm
@@ -1383,10 +1383,10 @@ All effects don't start immediately, but rather get worse over time; the rate is
 	glass_icon_state = "neurotoxinglass"
 	glass_name = "Neurotoxin"
 	glass_desc = "A drink that is guaranteed to knock you silly."
-	SplitChem			= TRUE
-	ImpureChem 			= "neuroweak"
-	InverseChemVal 		= 0 //Clear conversion
-	InverseChem 		= "neuroweak"
+	//SplitChem			= TRUE
+	impure_chem 			= "neuroweak"
+	inverse_chem_val 		= 0.5 //Clear conversion
+	inverse_chem			= "neuroweak"
 
 /datum/reagent/consumable/ethanol/neurotoxin/proc/pickt()
 	return (pick(TRAIT_PARALYSIS_L_ARM,TRAIT_PARALYSIS_R_ARM,TRAIT_PARALYSIS_R_LEG,TRAIT_PARALYSIS_L_LEG))
diff --git a/code/modules/reagents/chemistry/reagents/impure_reagents.dm b/code/modules/reagents/chemistry/reagents/impure_reagents.dm
new file mode 100644
index 0000000000..e24b811131
--- /dev/null
+++ b/code/modules/reagents/chemistry/reagents/impure_reagents.dm
@@ -0,0 +1,26 @@
+//Reagents produced by metabolising/reacting fermichems inoptimally, i.e. inverse_chems or impure_chems
+//Inverse = Splitting
+//Invert = Whole conversion
+
+/datum/reagent/impure
+    chemical_flags = REAGENT_INVISIBLE | REAGENT_SNEAKYNAME //by default, it will stay hidden on splitting, but take the name of the source on inverting
+
+
+/datum/reagent/impure/fermiTox
+	name = "Chemical Isomers"
+	id = "fermiTox"
+	description = "Toxic chemical isomers made from impure reactions. At low volumes will cause light toxin damage, but as the volume increases, it deals larger amounts, damages the liver, then eventually the heart."
+	data = "merge"
+	color = "FFFFFF"
+	can_synth = FALSE
+	var/potency = 1 //potency multiplies the volume when added.
+
+
+//I'm concerned this is too weak, but I also don't want deathmixes.
+//TODO: liver damage, 100+ heart
+/datum/reagent/impure/fermiTox/on_mob_life(mob/living/carbon/C, method)
+	if(C.dna && istype(C.dna.species, /datum/species/jelly))
+		C.adjustToxLoss(-2)
+	else
+		C.adjustToxLoss(2)
+	..()
diff --git a/code/modules/reagents/chemistry/reagents/other_reagents.dm b/code/modules/reagents/chemistry/reagents/other_reagents.dm
index bb99e05782..6b5e6d94bd 100644
--- a/code/modules/reagents/chemistry/reagents/other_reagents.dm
+++ b/code/modules/reagents/chemistry/reagents/other_reagents.dm
@@ -2115,7 +2115,7 @@
 	can_synth = FALSE
 	var/datum/dna/original_dna
 	var/reagent_ticks = 0
-	invisible = TRUE
+	chemical_flags = REAGENT_INVISIBLE
 
 /datum/reagent/changeling_string/on_mob_metabolize(mob/living/carbon/C)
 	if(C && C.dna && data["desired_dna"])
diff --git a/code/modules/reagents/chemistry/recipes.dm b/code/modules/reagents/chemistry/recipes.dm
index 32155c9b89..a915087428 100644
--- a/code/modules/reagents/chemistry/recipes.dm
+++ b/code/modules/reagents/chemistry/recipes.dm
@@ -32,6 +32,7 @@
 	var/RateUpLim 				= 10        // Optimal/max rate possible if all conditions are perfect
 	var/FermiChem				= FALSE 	// If the chemical uses the Fermichem reaction mechanics//If the chemical uses the Fermichem reaction mechanics
 	var/FermiExplode 			= FALSE 	// If the chemical explodes in a special way
+	var/clear_conversion						//bitflags for clear conversions; REACTION_CLEAR_IMPURE or REACTION_CLEAR_INVERSE
 	var/PurityMin 				= 0.15 		//If purity is below 0.15, it explodes too. Set to 0 to disable this.
 
 
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/MKUltra.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/MKUltra.dm
index 76d0951d97..4e80f42d87 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/MKUltra.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/MKUltra.dm
@@ -136,7 +136,6 @@ Creating a chem with a low purity will make you permanently fall in love with so
 	color = "#660015" // rgb: , 0, 255
 	taste_description = "synthetic chocolate, a base tone of alcohol, and high notes of roses"
 	overdose_threshold = 100 //If this is too easy to get 100u of this, then double it please.
-	DoNotSplit = TRUE
 	metabolization_rate = 0.1//It has to be slow, so there's time for the effect.
 	data = list("creatorID" = null, "creatorGender" = null, "creatorName" = null)
 	var/creatorID  //ckey
@@ -144,20 +143,19 @@ Creating a chem with a low purity will make you permanently fall in love with so
 	var/creatorName
 	var/mob/living/creator
 	pH = 10
-	OnMobMergeCheck = TRUE //Procs on_mob_add when merging into a human
+	chemical_flags = REAGENT_ONMOBMERGE | REAGENT_DONOTSPLIT //Procs on_mob_add when merging into a human
 	can_synth = FALSE
 
 
 /datum/reagent/fermi/enthrall/test
 	name = "MKUltraTest"
 	id = "enthrallTest"
-	description = "A forbidden deep red mixture that overwhelms a foreign body with waves of joy, intoxicating them into servitude. When taken by the creator, it will enhance the draw of their voice to those affected by it."
+	description = "A forbidden deep red mixture that makes you like Fermis a little too much. Unobtainable and due to be removed from the wiki."
 	data = list("creatorID" = "honkatonkbramblesnatch", "creatorGender" = "Mistress", "creatorName" = "Fermis Yakumo")
 	creatorID  = "honkatonkbramblesnatch"//ckey
 	creatorGender = "Mistress"
 	creatorName = "Fermis Yakumo"
 	purity = 1
-	DoNotSplit = TRUE
 
 /datum/reagent/fermi/enthrall/test/on_new()
 	id = "enthrall"
@@ -300,13 +298,13 @@ Creating a chem with a low purity will make you permanently fall in love with so
 
 //Creates a gas cloud when the reaction blows up, causing everyone in it to fall in love with someone/something while it's in their system.
 /datum/reagent/fermi/enthrallExplo//Created in a gas cloud when it explodes
-	name = "MKUltra"
+	name = "Gaseous MKUltra"
 	id = "enthrallExplo"
-	description = "A forbidden deep red mixture that overwhelms a foreign body with waves of desire, inducing a chemial love for another. Also, how the HECC did you get this?"
+	description = "A forbidden deep red gas that overwhelms a foreign body, causing the person they next lay their eyes on to become more interesting. Studies have shown that people are 66% more likely to make friends with this in the air. Produced when MKUltra explodes."
 	color = "#2C051A" // rgb: , 0, 255
 	metabolization_rate = 0.1
 	taste_description = "synthetic chocolate, a base tone of alcohol, and high notes of roses."
-	DoNotSplit = TRUE
+	chemical_flags = REAGENT_DONOTSPLIT
 	can_synth = FALSE
 	var/mob/living/carbon/love
 
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm
index 84c436cdbd..c405bb1a88 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/SDGF.dm
@@ -54,9 +54,9 @@ IMPORTANT FACTORS TO CONSIDER WHILE BALANCING
 	var/pollStarted = FALSE
 	var/location_created
 	var/startHunger
-	ImpureChem 			= "SDGFtox"
-	InverseChemVal 		= 0.5
-	InverseChem 		= "SDZF"
+	impure_chem 			= "SDGFtox"
+	inverse_chem_val 		= 0.5
+	inverse_chem		= "SDZF"
 	can_synth = TRUE
 
 
@@ -280,8 +280,9 @@ IMPORTANT FACTORS TO CONSIDER WHILE BALANCING
 
 //Unobtainable, used in clone spawn.
 /datum/reagent/fermi/SDGFheal
-	name = "synthetic-derived growth factor"
+	name = "synthetic-derived healing factor"
 	id = "SDGFheal"
+	description = "Leftover SDGF is transferred into the resulting clone, which quickly heals up the stresses from suddenly splitting. Restores blood, nutrition, and repaires brain and clone damage quickly. Only obtainable from using excess SDGF, and only enters the cloned body."
 	metabolization_rate = 1
 	can_synth = FALSE
 
@@ -294,29 +295,30 @@ IMPORTANT FACTORS TO CONSIDER WHILE BALANCING
 	..()
 
 //Unobtainable, used if SDGF is impure but not too impure
-/datum/reagent/fermi/SDGFtox
-	name = "synthetic-derived growth factor"
+/datum/reagent/impure/SDGFtox
+	name = "Synthetic-derived apoptosis factor"
 	id = "SDGFtox"
-	description = "A chem that makes a certain chemcat angry at you if you're reading this, how did you get this???"//i.e. tell me please, figure it's a good way to get pinged for bugfixes.
+	description = "Impure synthetic-derived growth factor causes certain cells to undergo cell death, causing clone damage, and damaging blood cells."//i.e. tell me please, figure it's a good way to get pinged for bugfixes.
 	metabolization_rate = 1
 	can_synth = FALSE
 
-/datum/reagent/fermi/SDGFtox/on_mob_life(mob/living/carbon/M)//Damages the taker if their purity is low. Extended use of impure chemicals will make the original die. (thus can't be spammed unless you've very good)
+/datum/reagent/impure/SDGFtox/on_mob_life(mob/living/carbon/M)//Damages the taker if their purity is low. Extended use of impure chemicals will make the original die. (thus can't be spammed unless you've very good)
 	M.blood_volume -= 10
 	M.adjustCloneLoss(2, 0)
 	..()
 
 //Fail state of SDGF
-/datum/reagent/fermi/SDZF
-	name = "synthetic-derived growth factor"
+/datum/reagent/impure/SDZF
+	name = "synthetic-derived zombie factor"
 	id = "SDZF"
-	description = "A horribly peverse mass of Embryonic stem cells made real by the hands of a failed chemist. This message should never appear, how did you manage to get a hold of this?"
+	description = "A horribly peverse mass of Embryonic stem cells made real by the hands of a failed chemist. Emulates normal synthetic-derived growth factor, but produces a hostile zombie at the end of it."
 	color = "#a502e0" // rgb: 96, 0, 255
 	metabolization_rate = 0.5 * REAGENTS_METABOLISM
 	var/startHunger
 	can_synth = TRUE
+	chemical_flags = REAGENT_SNEAKYNAME
 
-/datum/reagent/fermi/SDZF/on_mob_life(mob/living/carbon/M) //If you're bad at fermichem, turns your clone into a zombie instead.
+/datum/reagent/impure/SDZF/on_mob_life(mob/living/carbon/M) //If you're bad at fermichem, turns your clone into a zombie instead.
 	switch(current_cycle)//Pretends to be normal
 		if(20)
 			to_chat(M, "<span class='notice'>You feel the synethic cells rest uncomfortably within your body as they start to pulse and grow rapidly.</span>")
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/astrogen.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/astrogen.dm
index d05cfb552e..88586b423e 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/astrogen.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/astrogen.dm
@@ -28,7 +28,7 @@ I'd like to point out from my calculations it'll take about 60-80 minutes to die
 	var/datum/mind/originalmind
 	var/antiGenetics = 255
 	var/sleepytime = 0
-	InverseChemVal = 0.25
+	inverse_chem_val = 0.25
 	can_synth = FALSE
 
 /datum/action/chem/astral
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/enlargement.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/enlargement.dm
index d603f3ba10..69f76e380b 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/enlargement.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/enlargement.dm
@@ -26,9 +26,9 @@
 	taste_description = "a milky ice cream like flavour."
 	overdose_threshold = 17
 	metabolization_rate = 0.25
-	ImpureChem 			= "BEsmaller" //If you make an inpure chem, it stalls growth
-	InverseChemVal 		= 0.35
-	InverseChem 		= "BEsmaller" //At really impure vols, it just becomes 100% inverse
+	impure_chem 			= "BEsmaller" //If you make an inpure chem, it stalls growth
+	inverse_chem_val 		= 0.35
+	inverse_chem		= "BEsmaller" //At really impure vols, it just becomes 100% inverse
 	can_synth = FALSE
 
 /datum/reagent/fermi/breast_enlarger/on_mob_add(mob/living/carbon/M)
@@ -140,7 +140,7 @@
 /datum/reagent/fermi/BEsmaller
 	name = "Modesty milk"
 	id = "BEsmaller"
-	description = "A volatile collodial mixture derived from milk that encourages mammary reduction via a potent estrogen mix."
+	description = "A volatile collodial mixture derived from milk that encourages mammary reduction via a potent estrogen mix. Produced by reacting impure Succubus milk."
 	color = "#E60584" // rgb: 96, 0, 255
 	taste_description = "a milky ice cream like flavour."
 	metabolization_rate = 0.25
@@ -211,9 +211,9 @@
 	taste_description = "chinese dragon powder"
 	overdose_threshold = 17 //ODing makes you male and removes female genitals
 	metabolization_rate = 0.5
-	ImpureChem 			= "PEsmaller" //If you make an inpure chem, it stalls growth
-	InverseChemVal 		= 0.35
-	InverseChem 		= "PEsmaller" //At really impure vols, it just becomes 100% inverse and shrinks instead.
+	impure_chem 			= "PEsmaller" //If you make an inpure chem, it stalls growth
+	inverse_chem_val 		= 0.35
+	inverse_chem		= "PEsmaller" //At really impure vols, it just becomes 100% inverse and shrinks instead.
 	can_synth = FALSE
 
 /datum/reagent/fermi/penis_enlarger/on_mob_add(mob/living/carbon/M)
@@ -311,7 +311,7 @@
 /datum/reagent/fermi/PEsmaller // Due to cozmo's request...!
 	name = "Chastity draft"
 	id = "PEsmaller"
-	description = "A volatile collodial mixture derived from various masculine solutions that encourages a smaller gentleman's package via a potent testosterone mix, formula derived from a collaboration from Fermichem  and Doctor Ronald Hyatt, who is well known for his phallus palace."
+	description = "A volatile collodial mixture derived from various masculine solutions that encourages a smaller gentleman's package via a potent testosterone mix. Produced by reacting impure Incubus draft."
 	color = "#888888" // This is greyish..?
 	taste_description = "chinese dragon powder"
 	metabolization_rate = 0.5
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
index 2e272b722e..b9a79fe228 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/fermi_reagents.dm
@@ -6,7 +6,10 @@
 	id = "fermi"
 	taste_description	= "affection and love!"
 	can_synth = FALSE
-	SplitChem = TRUE
+	//SplitChem = TRUE
+	impure_chem 			= "fermiTox"// What chemical is metabolised with an inpure reaction
+	inverse_chem_val 		= 0.25		// If the impurity is below 0.5, replace ALL of the chem with inverse_chemupon metabolising
+	inverse_chem			= "fermiTox"
 
 //This should process fermichems to find out how pure they are and what effect to do.
 /datum/reagent/fermi/on_mob_add(mob/living/carbon/M, amount)
@@ -36,7 +39,7 @@
 	taste_description = "like jerky, whiskey and an off aftertaste of a crypt."
 	metabolization_rate = 0.2
 	overdose_threshold = 25
-	DoNotSplit = TRUE
+	chemical_flags = REAGENT_DONOTSPLIT
 	pH = 4
 	can_synth = TRUE
 
@@ -81,9 +84,9 @@
 	color = "#f9b9bc" // rgb: , 0, 255
 	taste_description = "dewicious degenyewacy"
 	metabolization_rate = 0.5 * REAGENTS_METABOLISM
-	InverseChemVal 		= 0
+	inverse_chem_val 		= 0
 	var/obj/item/organ/tongue/nT
-	DoNotSplit = TRUE
+	chemical_flags = REAGENT_DONOTSPLIT
 	pH = 5
 	var/obj/item/organ/tongue/T
 	can_synth = TRUE
@@ -170,9 +173,9 @@
 	description = "A stablised EMP that is highly volatile, shocking small nano machines that will kill them off at a rapid rate in a patient's system."
 	color = "#708f8f"
 	overdose_threshold = 15
-	ImpureChem 			= "nanite_b_goneTox" //If you make an inpure chem, it stalls growth
-	InverseChemVal 		= 0.25
-	InverseChem 		= "nanite_b_goneTox" //At really impure vols, it just becomes 100% inverse
+	impure_chem 			= "nanite_b_goneTox" //If you make an inpure chem, it stalls growth
+	inverse_chem_val 		= 0.25
+	inverse_chem		= "nanite_b_goneTox" //At really impure vols, it just becomes 100% inverse
 	taste_description = "what can only be described as licking a battery."
 	pH = 9
 	can_synth = FALSE
@@ -195,7 +198,7 @@
 		//empulse((get_turf(C)), 3, 2)//So the nanites randomize
 		var/atom/T = C
 		T.emp_act(EMP_HEAVY)
-		to_chat(C, "<span class='warning'>The nanites short circuit within your system!</b></span>")
+		to_chat(C, "<span class='warning'>You feel a strange tingling sensation come from your core.</b></span>")
 	if(isnull(N))
 		return ..()
 	N.nanite_volume = -2
@@ -205,10 +208,11 @@
 	O.emp_act(EMP_HEAVY)
 
 /datum/reagent/fermi/nanite_b_goneTox
-	name = "Naninte bain"
+	name = "Electromagnetic crystals"
 	id = "nanite_b_goneTox"
-	description = "Poorly made, and shocks you!"
-	metabolization_rate = 1
+	description = "Causes items upon the patient to sometimes short out, as well as causing a shock in the patient, if the residual charge between the crystals builds up to sufficient quantities"
+	metabolization_rate = 0.5
+	chemical_flags = REAGENT_INVISIBLE
 
 //Increases shock events.
 /datum/reagent/fermi/nanite_b_goneTox/on_mob_life(mob/living/carbon/C)//Damages the taker if their purity is low. Extended use of impure chemicals will make the original die. (thus can't be spammed unless you've very good)
@@ -273,7 +277,7 @@
 	name = "Fermis Test Reagent"
 	id = "fermiTest"
 	description = "You should be really careful with this...! Also, how did you get this?"
-	addProc = TRUE
+	chemical_flags = REAGENT_FORCEONNEW
 	can_synth = FALSE
 
 /datum/reagent/fermi/fermiTest/on_new(datum/reagents/holder)
@@ -304,22 +308,6 @@
 		playsound(get_turf(M), 'modular_citadel/sound/voice/merowr.ogg', 50, 1)
 	holder.clear_reagents()
 
-/datum/reagent/fermi/fermiTox
-	name = "FermiTox"
-	id = "fermiTox"
-	description = "You should be really careful with this...! Also, how did you get this? You shouldn't have this!"
-	data = "merge"
-	color = "FFFFFF"
-	can_synth = FALSE
-
-//I'm concerned this is too weak, but I also don't want deathmixes.
-/datum/reagent/fermi/fermiTox/on_mob_life(mob/living/carbon/C, method)
-	if(C.dna && istype(C.dna.species, /datum/species/jelly))
-		C.adjustToxLoss(-2)
-	else
-		C.adjustToxLoss(2)
-	..()
-
 /datum/reagent/fermi/acidic_buffer
 	name = "Acidic buffer"
 	id = "acidic_buffer"
diff --git a/modular_citadel/code/modules/reagents/chemistry/reagents/healing.dm b/modular_citadel/code/modules/reagents/chemistry/reagents/healing.dm
index c5f8950715..8b76c9b4e6 100644
--- a/modular_citadel/code/modules/reagents/chemistry/reagents/healing.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/reagents/healing.dm
@@ -6,9 +6,9 @@
 	color = "#68e83a"
 	pH = 8.6
 	overdose_threshold = 35
-	ImpureChem 			= "yamerol_tox"
-	InverseChemVal 		= 0.4
-	InverseChem 		= "yamerol_tox"
+	impure_chem 			= "yamerol_tox"
+	inverse_chem_val 		= 0.4
+	inverse_chem		= "yamerol_tox"
 	can_synth = TRUE
 
 /datum/reagent/fermi/yamerol/on_mob_life(mob/living/carbon/C)
@@ -73,15 +73,15 @@
 	C.adjustOxyLoss(-3)
 	..()
 
-/datum/reagent/fermi/yamerol_tox
-	name = "Yamerol"
+/datum/reagent/impure/yamerol_tox
+	name = "Yamer oh no"
 	id = "yamerol_tox"
-	description = "For when you've trouble speaking or breathing, just yell YAMEROL! A chem that helps soothe any congestion problems and at high concentrations restores damaged lungs and tongues!"
+	description = "A dangerous, cloying toxin that stucks to a patient’s respiratory system, damaging their tongue, lungs and causing suffocation."
 	taste_description = "a weird, syrupy flavour, yamero"
 	color = "#68e83a"
 	pH = 8.6
 
-/datum/reagent/fermi/yamerol_tox/on_mob_life(mob/living/carbon/C)
+/datum/reagent/impure/yamerol_tox/on_mob_life(mob/living/carbon/C)
 	var/obj/item/organ/tongue/T = C.getorganslot(ORGAN_SLOT_TONGUE)
 	var/obj/item/organ/lungs/L = C.getorganslot(ORGAN_SLOT_LUNGS)
 
diff --git a/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm b/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
index c4e9b79b18..b7d45b0cb1 100644
--- a/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
+++ b/modular_citadel/code/modules/reagents/chemistry/recipes/fermi.dm
@@ -6,7 +6,25 @@
 	return
 
 //Called when reaction STOP_PROCESSING
-/datum/chemical_reaction/proc/FermiFinish(datum/reagents/holder)
+/datum/chemical_reaction/proc/FermiFinish(datum/reagents/holder, var/atom/my_atom, reactVol)
+	if(clear_conversion == REACTION_CLEAR_IMPURE | REACTION_CLEAR_INVERSE)
+		for(var/id in results)
+			var/datum/reagent/R = my_atom.reagents.has_reagent("[id]")
+			if(R.purity == 1)
+				continue
+
+			var/cached_volume = R.volume
+			if(clear_conversion == REACTION_CLEAR_INVERSE && R.inverse_chem)
+				if(R.inverse_chem_val > R.purity)
+					my_atom.reagents.remove_reagent(R.id, cached_volume, FALSE)
+					my_atom.reagents.add_reagent(R.inverse_chem, cached_volume, FALSE, other_purity = 1)
+
+			else if (clear_conversion == REACTION_CLEAR_IMPURE && R.impure_chem)
+				var/impureVol = cached_volume * (1 - R.purity)
+				my_atom.reagents.remove_reagent(R.id, (impureVol), FALSE)
+				my_atom.reagents.add_reagent(R.impure_chem, impureVol, FALSE, other_purity = 1)
+				R.cached_purity = R.purity
+				R.purity = 1
 	return
 
 //Called when temperature is above a certain threshold, or if purity is too low.
diff --git a/tgstation.dme b/tgstation.dme
index 09dcf5eb08..1f8b1a964d 100755
--- a/tgstation.dme
+++ b/tgstation.dme
@@ -2539,6 +2539,7 @@
 #include "code\modules\reagents\chemistry\reagents\drink_reagents.dm"
 #include "code\modules\reagents\chemistry\reagents\drug_reagents.dm"
 #include "code\modules\reagents\chemistry\reagents\food_reagents.dm"
+#include "code\modules\reagents\chemistry\reagents\impure_reagents.dm"
 #include "code\modules\reagents\chemistry\reagents\medicine_reagents.dm"
 #include "code\modules\reagents\chemistry\reagents\other_reagents.dm"
 #include "code\modules\reagents\chemistry\reagents\pyrotechnic_reagents.dm"