diff --git a/code/modules/reagents/chemistry/holder.dm b/code/modules/reagents/chemistry/holder.dm
index a3746d6bdb5..a2d2f4dcda0 100644
--- a/code/modules/reagents/chemistry/holder.dm
+++ b/code/modules/reagents/chemistry/holder.dm
@@ -815,7 +815,7 @@
 		added_purity = 0
 
 	if((reagent.inverse_chem_val > added_purity) && (reagent.inverse_chem))//Turns all of a added reagent into the inverse chem
-		add_reagent(reagent.inverse_chem, added_volume, FALSE, added_purity = 1-reagent.creation_purity)
+		add_reagent(reagent.inverse_chem, added_volume, FALSE, added_purity = reagent.get_inverse_purity(reagent.creation_purity))
 		var/datum/reagent/inverse_reagent = has_reagent(reagent.inverse_chem)
 		if(inverse_reagent.chemical_flags & REAGENT_SNEAKYNAME)
 			inverse_reagent.name = reagent.name//Negative effects are hidden
diff --git a/code/modules/reagents/chemistry/machinery/chem_mass_spec.dm b/code/modules/reagents/chemistry/machinery/chem_mass_spec.dm
index 229dd16e7f0..9cffb75420c 100644
--- a/code/modules/reagents/chemistry/machinery/chem_mass_spec.dm
+++ b/code/modules/reagents/chemistry/machinery/chem_mass_spec.dm
@@ -219,7 +219,7 @@ This will not clean any inverted reagents. Inverted reagents will still be corre
 				var/datum/reagent/inverse_reagent = GLOB.chemical_reagents_list[reagent.inverse_chem]
 				if(inverse_reagent.mass < lower_mass_range || inverse_reagent.mass > upper_mass_range)
 					in_range = FALSE
-				beakerContents.Add(list(list("name" = inverse_reagent.name, "volume" = round(reagent.volume, 0.01), "mass" = inverse_reagent.mass, "purity" = round(1-reagent.purity, 0.01)*100, "selected" = in_range, "color" = "#b60046", "type" = "Inverted")))
+				beakerContents.Add(list(list("name" = inverse_reagent.name, "volume" = round(reagent.volume, 0.01), "mass" = inverse_reagent.mass, "purity" = round(reagent.get_inverse_purity(), 0.01)*100, "selected" = in_range, "color" = "#b60046", "type" = "Inverted")))
 				data["peakHeight"] = max(data["peakHeight"], reagent.volume)
 				continue
 			if(reagent.mass < lower_mass_range || reagent.mass > upper_mass_range)
@@ -332,7 +332,7 @@ This will not clean any inverted reagents. Inverted reagents will still be corre
 			if(inverse_reagent.mass < lower_mass_range || inverse_reagent.mass > upper_mass_range)
 				continue
 			log += list(inverse_reagent.type = "Cannot purify inverted") //Might as well make it do something - just updates the reagent's name
-			beaker2.reagents.add_reagent(reagent.inverse_chem, volume, reagtemp = beaker1.reagents.chem_temp, added_purity = 1-reagent.purity)
+			beaker2.reagents.add_reagent(reagent.inverse_chem, volume, reagtemp = beaker1.reagents.chem_temp, added_purity = reagent.get_inverse_purity())
 			beaker1.reagents.remove_reagent(reagent.type, volume)
 			continue
 
@@ -398,7 +398,6 @@ This will not clean any inverted reagents. Inverted reagents will still be corre
 			continue
 		if(reagent.mass < lower_mass_range || reagent.mass > upper_mass_range)
 			continue
-		var/inverse_purity = 1-reagent.purity
-		time += (((reagent.mass * reagent.volume) + (reagent.mass * inverse_purity * 0.1)) * 0.0035) + 10 ///Roughly 10 - 30s?
+		time += (((reagent.mass * reagent.volume) + (reagent.mass * reagent.get_inverse_purity() * 0.1)) * 0.0035) + 10 ///Roughly 10 - 30s?
 	delay_time = (time * cms_coefficient)
 	return delay_time
diff --git a/code/modules/reagents/chemistry/reagents.dm b/code/modules/reagents/chemistry/reagents.dm
index 7d2b4e72d51..af7c68f7145 100644
--- a/code/modules/reagents/chemistry/reagents.dm
+++ b/code/modules/reagents/chemistry/reagents.dm
@@ -244,6 +244,19 @@ Primarily used in reagents/reaction_agents
 		creation_purity = src.creation_purity
 	return creation_purity / normalise_num_to
 
+/**
+ * Gets the inverse purity of this reagent. Mostly used when converting from a normal reagent to it's inverse one.
+ *
+ * Arguments
+ * * purity - Overrides the purity used for determining the inverse purity.
+ */
+/datum/reagent/proc/get_inverse_purity(purity)
+	if(!inverse_chem || !inverse_chem_val)
+		return
+	if(!purity)
+		purity = src.purity
+	return min(1-inverse_chem_val + purity + 0.01, 1) //Gives inverse reactions a 1% purity threshold for being 100% pure to appease players with OCD.
+
 /**
  * Input a reagent_list, outputs pretty readable text!
  * Default output will be formatted as
diff --git a/code/modules/reagents/chemistry/recipes.dm b/code/modules/reagents/chemistry/recipes.dm
index 23864f9fb8c..970a5208431 100644
--- a/code/modules/reagents/chemistry/recipes.dm
+++ b/code/modules/reagents/chemistry/recipes.dm
@@ -161,7 +161,7 @@
 		if((reaction_flags & REACTION_CLEAR_INVERSE) && reagent.inverse_chem)
 			if(reagent.inverse_chem_val > reagent.purity)
 				holder.remove_reagent(reagent.type, cached_volume, FALSE)
-				holder.add_reagent(reagent.inverse_chem, cached_volume, FALSE, added_purity = 1-cached_purity)
+				holder.add_reagent(reagent.inverse_chem, cached_volume, FALSE, added_purity = reagent.get_inverse_purity(cached_purity))
 				return
 
 /**