Chemical splash fixes, distillery fix, and syringe gun fix. (#19219)

* Fixes distillery always using atmos air

Distillery did not have a return_air() proc, so it would default to the atmos air even when piped. This fixes that.

* Fixes syringe guns allowing loading of multiple syringes

* Affect_touch changes

* Some more changes

* Reworks cyanide

code/modules/projectiles/guns/launcher/syringe_gun.dm

@@ -19,6 +19,9 @@
 
 /obj/item/syringe_cartridge/attackby(obj/item/I, mob/user)
 	if(istype(I, /obj/item/reagent_containers/syringe))
+		if(syringe)
+			to_chat(user, span_warning("[src] already has a syringe loaded!"))
+			return
 		syringe = I
 		to_chat(user, span_notice("You carefully insert [syringe] into [src]."))
 		user.remove_from_mob(syringe)

code/modules/reagents/machinery/distillery.dm

@@ -5,7 +5,7 @@
 
 /obj/machinery/portable_atmospherics/powered/reagent_distillery
 	name = "chemical distillery"
-	desc = "A complex machine utilizing state-of-the-art components to mix chemicals at different temperatures."
+	desc = "A complex machine utilizing state-of-the-art components to mix chemicals at different temperatures. Can be attached to a connector port to utilize gasses."
 	use_power = USE_POWER_IDLE
 
 	icon = 'icons/obj/machines/reagent.dmi'
@@ -24,7 +24,7 @@
 
 	var/current_temp = T20C
 
-	var/use_atmos = FALSE	// If true, this machine will be connectable to ports, and use gas mixtures as the source of heat, rather than its internal controls.
+	var/use_atmos = FALSE	// If true, this machine will use the temperature of the connected gas mixtures as the source of heat, rather than its internal controls.
 
 	var/static/radial_examine = image(icon = 'icons/mob/radial.dmi', icon_state = "radial_examine")
 	var/static/radial_use = image(icon = 'icons/mob/radial.dmi', icon_state = "radial_use")
@@ -366,6 +366,14 @@
 
 /obj/machinery/portable_atmospherics/powered/reagent_distillery/industrial
 	name = "industrial chemical distillery"
-	desc = "A gas-operated variant of a chemical distillery. Able to reach much higher, and lower, temperatures through the use of treated gas."
+	desc = "A gas-operated variant of a chemical distillery. Able to reach much higher, and lower, temperatures through the use of treated gas at the cost of not having an internal heater/cooler."
 
 	use_atmos = TRUE
+
+
+/obj/machinery/portable_atmospherics/powered/reagent_distillery/return_air()
+	if(connected_port)
+		var/obj/machinery/atmospherics/portables_connector/our_port = connected_port
+		if(our_port.network)
+			return our_port.network.gases[1]
+	. = ..()

code/modules/reagents/reagents/_reagents.dm

@@ -54,6 +54,10 @@
 	var/glass_center_of_mass_x = 0
 	var/glass_center_of_mass_y = 0
 
+	///How much (if any) of this reagent penetrates through skin and into the bloodstream. Ranges from 0 (none at all) to 1 (100% transfer from skin to blood).
+	///This is for chemicals that don't have any special touch effects.
+	var/dermal_absorption = 0
+
 /datum/reagent/proc/remove_self(var/amount) // Shortcut
 	if(holder)
 		holder.remove_reagent(id, amount)
@@ -200,7 +204,7 @@
 	return
 
 /datum/reagent/proc/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
-	M.bloodstr.add_reagent(id, removed * 0.25) //Medications that are dermal compatible use affect_touch. Those that aren't apply the reagent to the bloodstream at 25% efficiency.
+	M.bloodstr.add_reagent(id, removed * dermal_absorption)
 	return
 
 /datum/reagent/proc/overdose(var/mob/living/carbon/M, var/alien, var/removed) // Overdose effect.

code/modules/reagents/reagents/dispenser.dm

@@ -483,6 +483,7 @@
 	scannable = SCANNABLE_ADVANCED
 	color = "#DB5008"
 	metabolism = REM * 2
+	dermal_absorption = 0
 	touch_met = 50 // It's acid!
 	var/power = 5
 	var/meltdose = 10 // How much is needed to melt

code/modules/reagents/reagents/drugs.dm

@@ -21,6 +21,7 @@
 	reagent_state = LIQUID
 	metabolism = REM * 0.5
 	ingest_met = REM * 1.5 /// Be very careful with this, ingestion is weird and will spam high/sober messages horribly!
+	dermal_absorption = 0
 	mrate_static = TRUE
 	overdose = REAGENTS_OVERDOSE
 
@@ -218,6 +219,7 @@
 /datum/reagent/drugs/nicotine
 	name = REAGENT_NICOTINE
 	id = REAGENT_ID_NICOTINE
+	dermal_absorption = 0.5 //Nicotine patches are REAL
 	description = "A highly addictive stimulant extracted from the tobacco plant."
 	taste_description = "sour staleness"
 	color = "#181818"

code/modules/reagents/reagents/food_drinks.dm

@@ -871,6 +871,7 @@
 	scannable = SCANNABLE_ADVANCED
 	description = "A chemical agent used for self-defense and in police work."
 	taste_description = "fire"
+	dermal_absorption = 0
 	taste_mult = 10
 	reagent_state = LIQUID
 	touch_met = 50 // Get rid of it quickly
@@ -1025,6 +1026,7 @@
 	var/adj_sleepy = 0
 	var/adj_temp = 0
 	var/water_based = TRUE
+	dermal_absorption = 0
 	wiki_flag = WIKI_DRINK
 	supply_conversion_value = REFINERYEXPORT_VALUE_COMMON
 	industrial_use = REFINERYEXPORT_REASON_FOOD

code/modules/reagents/reagents/food_drinks_vr.dm

@@ -729,6 +729,7 @@
 	adj_dizzy = 0
 	adj_drowsy = -5
 	adj_sleepy = -10
+	dermal_absorption = 0.15 //Nukies are build different.
 
 	glass_name = REAGENT_ID_NUKIE
 	glass_desc = "A drink to perk you up and refresh you!"

code/modules/reagents/reagents/medicine.dm

@@ -9,6 +9,7 @@
 	color = "#00BFFF"
 	overdose = REAGENTS_OVERDOSE * 2
 	metabolism = REM * 0.2
+	dermal_absorption = 0.2
 	scannable = SCANNABLE_BENEFICIAL
 	supply_conversion_value = REFINERYEXPORT_VALUE_COMMON
 	industrial_use = REFINERYEXPORT_REASON_DRUG
@@ -54,6 +55,7 @@
 	color = "#BF0000"
 	overdose = REAGENTS_OVERDOSE
 	overdose_mod = 0.25
+	dermal_absorption = 0.2
 	scannable = SCANNABLE_BENEFICIAL
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
 	industrial_use = REFINERYEXPORT_REASON_DRUG
@@ -118,6 +120,7 @@
 	description = "Calcium carbonate is a calcium salt commonly used as an antacid."
 	taste_description = "chalk"
 	reagent_state = SOLID
+	dermal_absorption = 0 //Solids don't penetrate.
 	color = "#eae6e3"
 	overdose = REAGENTS_OVERDOSE * 0.8
 	metabolism = REM * 0.4
@@ -139,6 +142,7 @@
 	description = REAGENT_KELOTANE + " is a drug used to treat burns."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FFA800"
 	overdose = REAGENTS_OVERDOSE
 	scannable = SCANNABLE_BENEFICIAL
@@ -161,6 +165,7 @@
 	taste_description = "bitterness"
 	taste_mult = 1.5
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FF8000"
 	overdose = REAGENTS_OVERDOSE * 0.5
 	scannable = SCANNABLE_BENEFICIAL
@@ -210,6 +215,7 @@
 	description = REAGENT_ANTITOXIN + " is a broad-spectrum antitoxin."
 	taste_description = "a roll of gauze"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#00A000"
 	scannable = SCANNABLE_BENEFICIAL
 	supply_conversion_value = REFINERYEXPORT_VALUE_COMMON
@@ -233,6 +239,7 @@
 	id = REAGENT_ID_CARTHATOLINE
 	description = REAGENT_CARTHATOLINE + " is strong evacuant used to treat severe poisoning."
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#225722"
 	scannable = SCANNABLE_BENEFICIAL
 	overdose = REAGENTS_OVERDOSE * 0.5
@@ -271,6 +278,7 @@
 	description = REAGENT_DEXALIN + " is used in the treatment of oxygen deprivation."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#0080FF"
 	overdose = REAGENTS_OVERDOSE
 	scannable = SCANNABLE_BENEFICIAL
@@ -298,6 +306,7 @@
 	description = REAGENT_DEXALINP + " is used in the treatment of oxygen deprivation. It is highly effective."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#0040FF"
 	overdose = REAGENTS_OVERDOSE * 0.5
 	overdose_mod = 1.25
@@ -325,6 +334,7 @@
 	description = REAGENT_TRICORDRAZINE + " is a highly potent stimulant, originally derived from cordrazine. Can be used to treat a wide range of injuries."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#8040FF"
 	scannable = SCANNABLE_BENEFICIAL
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
@@ -387,6 +397,7 @@
 	description = "A chemical mixture with almost magical healing powers. Its main limitation is that the targets body temperature must be under 170K for it to metabolise correctly."
 	taste_description = "overripe bananas"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#8080FF"
 	metabolism = REM * 0.5
 	mrate_static = TRUE
@@ -414,6 +425,7 @@
 	description = "A liquid compound similar to that used in the cloning process. Can be used to 'finish' the cloning process when used in conjunction with a cryo tube."
 	taste_description = "rotten bananas"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#80BFFF"
 	metabolism = REM * 0.5
 	mrate_static = TRUE
@@ -442,6 +454,7 @@
 	description = "A liquid compound based upon those used in cloning. Utilized in cases of toxic shock. May cause liver damage."
 	taste_description = "meat"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#6b4de3"
 	metabolism = REM * 0.5
 	mrate_static = TRUE
@@ -483,6 +496,7 @@
 	description = "A liquid compound based upon that which is used in the cloning process. Utilized primarily in severe cases of toxic shock."
 	taste_description = "meat"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#94B21C"
 	metabolism = REM * 0.5
 	mrate_static = TRUE
@@ -520,6 +534,7 @@
 	description = "Most probably know this as Tylenol, but this chemical is a mild, simple painkiller."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#C8A5DC"
 	overdose = REAGENTS_OVERDOSE * 2
 	overdose_mod = 0.75
@@ -547,6 +562,7 @@
 	description = "A simple, yet effective painkiller."
 	taste_description = "sourness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#CB68FC"
 	overdose = REAGENTS_OVERDOSE
 	overdose_mod = 0.75
@@ -573,6 +589,7 @@
 	description = "An effective and very addictive painkiller."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#800080"
 	overdose = 20
 	overdose_mod = 0.75
@@ -605,6 +622,7 @@
 	description = REAGENT_SYNAPTIZINE + " is used to treat various diseases."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#99CCFF"
 	metabolism = REM * 0.05
 	mrate_static = TRUE
@@ -638,6 +656,7 @@
 	description = REAGENT_HYPERZINE + " is a highly effective, long lasting, muscle stimulant."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FF3300"
 	overdose = REAGENTS_OVERDOSE * 0.5
 	scannable = SCANNABLE_ADVANCED
@@ -671,6 +690,7 @@
 	description = REAGENT_ALKYSINE + " is a drug used to lessen the damage to neurological tissue after a catastrophic injury. Can heal brain tissue."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FFFF66"
 	metabolism = REM * 0.25
 	overdose = REAGENTS_OVERDOSE
@@ -697,6 +717,7 @@
 	description = "Heals eye damage"
 	taste_description = "dull toxin"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#C8A5DC"
 	overdose = REAGENTS_OVERDOSE
 	scannable = SCANNABLE_BENEFICIAL
@@ -723,6 +744,7 @@
 	description = "Used to encourage recovery of internal organs and nervous systems. Medicate cautiously."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#561EC3"
 	overdose = 10
 	overdose_mod = 1.5
@@ -757,6 +779,7 @@
 	id = REAGENT_ID_OSTEODAXON
 	description = "An experimental drug used to heal bone fractures."
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#C9BCE3"
 	metabolism = REM * 0.5
 	overdose = REAGENTS_OVERDOSE * 0.5
@@ -791,6 +814,7 @@
 	id = REAGENT_ID_MYELAMINE
 	description = "Used to rapidly clot hemorrhages by increasing the effectiveness of platelets. An ideal dosage of 10 units will fully heal any internal hemorrhages."
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#4246C7"
 	metabolism = REM * 0.75
 	overdose = REAGENTS_OVERDOSE * 0.5
@@ -841,6 +865,7 @@
 	description = "Used to repair the tissue of the lungs and similar organs."
 	taste_description = "metallic"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#4444FF"
 	metabolism = REM * 1.5
 	overdose = 10
@@ -875,6 +900,7 @@
 	description = "Used to repair the tissues of the digestive system."
 	taste_description = "chalk"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#8B4513"
 	metabolism = REM * 1.5
 	overdose = 10
@@ -909,6 +935,7 @@
 	description = "Used to repair the common tissues involved in filtration."
 	taste_description = "glue"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#D2691E"
 	metabolism = REM * 1.5
 	overdose = 10
@@ -945,6 +972,7 @@
 	description = "Used to repair the specialized tissues involved in the circulatory system."
 	taste_description = "rust"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FF4444"
 	metabolism = REM * 1.5
 	overdose = 10
@@ -976,6 +1004,7 @@
 	description = "An experimental powder believed to have the ability to prevent any organ rejection."
 	taste_description = "flesh"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	color = "#7B4D4F"
 	overdose = 20
 	overdose_mod = 1.5
@@ -1033,6 +1062,7 @@
 	description = "A strange, oily powder used by Malish-Katish to prevent organ rejection."
 	taste_description = "mordant"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	color = "#84B2B0"
 	metabolism = REM * 0.06
 	overdose = 20
@@ -1078,6 +1108,7 @@
 	description = REAGENT_RYETALYN + " can cure DNA, Cloning, and genetic damage via a catalytic process."
 	taste_description = "acid"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	scannable = SCANNABLE_BENEFICIAL
 	color = "#004000"
 	overdose = REAGENTS_OVERDOSE
@@ -1097,6 +1128,7 @@
 	description = "A powerful oxidizer that reacts with ethanol."
 	taste_description = "bitterness"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	scannable = SCANNABLE_BENEFICIAL
 	color = "#605048"
 	overdose = REAGENTS_OVERDOSE
@@ -1133,6 +1165,7 @@
 	description = REAGENT_HYRONALIN + " is a medicinal drug used to counter the effect of radiation poisoning."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#408000"
 	metabolism = REM * 0.25
 	overdose = REAGENTS_OVERDOSE
@@ -1152,6 +1185,7 @@
 	description = REAGENT_ARITHRAZINE + " is an unstable medication used for the most extreme cases of radiation poisoning."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#008000"
 	metabolism = REM * 0.25
 	overdose = REAGENTS_OVERDOSE
@@ -1175,6 +1209,7 @@
 	description = "An all-purpose antiviral agent."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#C1C1C1"
 	metabolism = REM * 0.25
 	mrate_static = TRUE
@@ -1206,6 +1241,7 @@
 	description = "A wide-spectrum antibiotic drug. Powerful and uncomfortable in equal doses."
 	taste_description = "burnt toast"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#FFB0B0"
 	mrate_static = TRUE
 	overdose = 10
@@ -1276,6 +1312,7 @@
 	description = "An all-purpose painkilling antibiotic gel."
 	taste_description = "oil"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	color = "#C1C1C8"
 	metabolism = REM * 0.4
 	mrate_static = TRUE
@@ -1326,6 +1363,7 @@
 	description = "Sterilizes wounds in preparation for surgery and thoroughly removes blood. Can additionally be used to prepare a surface for surgery to lower risk of infection."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0 //Custom touch handling.
 	color = "#C8A5DC"
 	scannable = SCANNABLE_BENEFICIAL
 	touch_met = 5
@@ -1379,6 +1417,7 @@
 	description = "Leporazine can be use to stabilize an individuals body temperature."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#C8A5DC"
 	overdose = REAGENTS_OVERDOSE
 	scannable = SCANNABLE_BENEFICIAL
@@ -1404,6 +1443,7 @@
 	description = "A powder with almost magical properties, this substance can effectively treat genetic damage in humanoids, though excessive consumption has side effects."
 	taste_description = "bitterness"
 	reagent_state = SOLID
+	dermal_absorption = 0 //solid powder
 	color = "#669900"
 	overdose = REAGENTS_OVERDOSE
 	overdose_mod = 2
@@ -1488,6 +1528,7 @@
 	description = "A rare plant extract with immense, almost magical healing capabilities. Induces a potent psychoactive state, damaging neurons with prolonged use."
 	taste_description = "honey and sunlight"
 	reagent_state = LIQUID
+	dermal_absorption = 0.25
 	color = "#ffb500"
 	overdose = REAGENTS_OVERDOSE * 0.50
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
@@ -1511,6 +1552,7 @@
 	description = "A drug used to stablize vat grown bodies. Often used to control the lifespan of biological experiments." // Who else remembers Cybersix?
 	taste_description = "burning metal"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#31d422"
 	overdose = 15
 	overdose_mod = 1.2
@@ -1572,6 +1614,7 @@
 	color = "#afeb17"
 	metabolism = 0.05
 	scannable = SCANNABLE_BENEFICIAL
+	dermal_absorption = 0.2
 	description = "A well respected drug used for treatment of schizophrenia in specific."
 	overdose = REAGENTS_OVERDOSE * 2
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED

code/modules/reagents/reagents/medicine_vr.dm

@@ -4,6 +4,7 @@
 	description = "A mild sedative that calms the nerves and relaxes the patient."
 	taste_description = "milk"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2 //Most medication has a much weaker effect as a patch.
 	color = "#d5e2e5"
 	scannable = SCANNABLE_BENEFICIAL
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
@@ -71,6 +72,7 @@
 	taste_description = "sparkles"
 	taste_mult = 3
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#750404"
 	overdose = REAGENTS_OVERDOSE * 0.5
 	scannable = SCANNABLE_BENEFICIAL
@@ -103,13 +105,13 @@
 	M.remove_a_modifier_of_type(/datum/modifier/faux_resleeving_sickness)
 
 
-
 /datum/reagent/prussian_blue //We don't have iodine, so prussian blue we go.
 	name = REAGENT_PRUSSIANBLUE
 	id = REAGENT_ID_PRUSSIANBLUE
 	description = "Prussian Blue is a medication used to temporarily pause the effects of radiation poisoning to allow for treatment. Does not treat radiation sickness on its own."
 	taste_description = "salt"
 	reagent_state = SOLID
+	dermal_absorption = 0.2 //While it /is/ a solid, it's a beneficial medical reagent that should have some use if put into a patch.
 	color = "#003153" //Blue!
 	metabolism = REM * 0.25//20 ticks to do things per unit injected. This means injecting 30u will give you 10 minutes to do what you need.
 	overdose = REAGENTS_OVERDOSE
@@ -129,6 +131,7 @@
 	description = "A chemical compound that causes a dangerously powerful fat-burning reaction."
 	taste_description = "blandness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	scannable = SCANNABLE_BENEFICIAL
 	color = "#47AD6D"
 	overdose = REAGENTS_OVERDOSE
@@ -146,6 +149,7 @@
 	description = "A chemical compound that causes a dangerously powerful fat-adding reaction."
 	taste_description = "blubber"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#61731C"
 	scannable = SCANNABLE_BENEFICIAL
 	overdose = REAGENTS_OVERDOSE
@@ -251,6 +255,7 @@
 	id = REAGENT_ID_GLAMOUR
 	description = "This material is from somewhere else, just being near produces changes."
 	taste_description = "change"
+	dermal_absorption = 1 //Magic liquid stuff. It immediately clears itself in your system the moment it touches you, so whatever.
 	reagent_state = LIQUID
 	color = "#ffffff"
 	scannable = SCANNABLE_SECRETIVE

code/modules/reagents/reagents/modifiers.dm

@@ -8,6 +8,7 @@
 	description = "A liquid that is capable of causing a prolonged state of heightened aggression and durability."
 	taste_description = "metal"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	color = "#ff5555"
 	metabolism = REM
 	scannable = SCANNABLE_SECRETIVE

code/modules/reagents/reagents/other.dm

@@ -5,7 +5,8 @@
 	id = REAGENT_ID_CRAYONDUST
 	description = "Intensely coloured powder obtained by grinding crayons."
 	taste_description = "powdered wax"
-	reagent_state = LIQUID
+	reagent_state = SOLID
+	dermal_absorption = 0 //no
 	color = "#888888"
 	overdose = 10
 	scannable = SCANNABLE_ADVANCED
@@ -58,6 +59,7 @@
 	description = "Intensely coloured ink used in markers."
 	taste_description = "extremely bitter"
 	reagent_state = LIQUID
+	dermal_absorption = 0 //NO
 	color = "#888888"
 	overdose = 10
 	scannable = SCANNABLE_ADVANCED
@@ -115,6 +117,7 @@
 	description = "This paint will stick to almost any object."
 	taste_description = "chalk"
 	reagent_state = LIQUID
+	dermal_absorption = 0 //NOOOOOOOOOOO
 	color = "#808080"
 	overdose = REAGENTS_OVERDOSE * 0.5
 	color_weight = 20
@@ -377,6 +380,7 @@
 	description = "Adrenaline is a hormone used as a drug to treat cardiac arrest and other cardiac dysrhythmias resulting in diminished or absent cardiac output."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2
 	scannable = SCANNABLE_BENEFICIAL
 	color = "#C8A5DC"
 	mrate_static = TRUE
@@ -397,6 +401,7 @@
 	taste_description = "water"
 	color = "#E0E8EF"
 	mrate_static = TRUE
+	dermal_absorption = 0.5 //It's so holy it penetrates into your blood.
 	scannable = SCANNABLE_BENEFICIAL
 
 	glass_name = "holy water"
@@ -518,6 +523,7 @@
 	description = "Thermite produces an aluminothermic reaction known as a thermite reaction. Can be used to melt walls."
 	taste_description = "sweet tasting metal"
 	reagent_state = SOLID
+	dermal_absorption = 0
 	scannable = SCANNABLE_ADVANCED
 	color = "#673910"
 	touch_met = 50
@@ -548,6 +554,7 @@
 	description = "A compound used to clean things. Now with 50% more sodium hypochlorite!"
 	taste_description = "sourness"
 	reagent_state = LIQUID
+	dermal_absorption = 0
 	scannable = SCANNABLE_ADVANCED
 	color = "#A5F0EE"
 	touch_met = 50
@@ -682,7 +689,7 @@
 	industrial_use = REFINERYEXPORT_REASON_PRECURSOR
 	coolant_modifier = 0.95
 
-/datum/reagent/nitroglycerin
+/datum/reagent/nitroglycerin //This immediately explode as soon as it reacts, so you can't actually obtain this.
 	name = REAGENT_NITROGLYCERIN
 	id = REAGENT_ID_NITROGLYCERIN
 	description = "Nitroglycerin is a heavy, colorless, oily, explosive liquid obtained by nitrating glycerol."
@@ -795,6 +802,7 @@
 	description = "Miniature medical robots that are malfunctioning and cause bodily harm. Fortunately, they cannot self-replicate."
 	taste_description = "metal"
 	reagent_state = SOLID
+	dermal_absorption = 0.1 //Burrow into the skin and get into your bloodstream. This means 60u splashed on someone (with no losses, given splash is lossy) will give them 6u of nanites.
 	color = "#333333"
 	metabolism = REM * 3 // Broken nanomachines go a bit slower.
 	scannable = 1

code/modules/reagents/reagents/other_vr.dm

@@ -3,6 +3,7 @@
 	id = REAGENT_ID_ADVMUTATIONTOXIN
 	description = "A corruptive toxin produced by slimes. Turns the subject of the chemical into a Promethean."
 	reagent_state = LIQUID
+	dermal_absorption = 0 //Injection only.
 	color = "#13BC5E"
 	scannable = SCANNABLE_ADVANCED
 	supply_conversion_value = REFINERYEXPORT_VALUE_MASSINDUSTRY
@@ -61,6 +62,7 @@
 	id = REAGENT_ID_FIREFOAM
 	description = "A historical fire suppressant. Originally believed to simply displace oxygen to starve fires, it actually interferes with the combustion reaction itself. Vastly superior to the cheap water-based extinguishers found on most NT vessels."
 	reagent_state = LIQUID
+	dermal_absorption = 0 //Custom touch handling. As funny as PFAS poisoning is.
 	color = "#A6FAFF"
 	scannable = SCANNABLE_ADVANCED
 	taste_description = "the inside of a fire extinguisher"

code/modules/reagents/reagents/toxins.dm

@@ -12,7 +12,7 @@
 	filtered_organs = list(O_LIVER, O_KIDNEYS)
 	scannable = SCANNABLE_DIFFICULT
 	var/strength = 4 // How much damage it deals per unit
-	var/skin_danger = 0.2 // The multiplier for how effective the toxin is when making skin contact.
+	dermal_absorption = 0
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
 	industrial_use = REFINERYEXPORT_REASON_PRECURSOR
 
@@ -28,13 +28,11 @@
 				M.heal_organ_damage((10/poison_strength) * removed, (10/poison_strength) * removed) //Doses of toxins below 10 units, and 10 strength, are capable of providing useful compounds for repair.
 		M.adjustToxLoss(poison_strength * removed)
 
-/datum/reagent/toxin/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
-	affect_blood(M, alien, removed * 0.2)
-
 /datum/reagent/toxin/plasticide
 	name = REAGENT_PLASTICIDE
 	id = REAGENT_ID_PLASTICIDE
 	description = "Liquid plastic, do not eat."
+	dermal_absorption = 0
 	taste_description = "plastic"
 	reagent_state = LIQUID
 	color = "#CF3600"
@@ -65,6 +63,7 @@
 	description = "A deadly neurotoxin produced by the dreaded space carp."
 	taste_description = "fish"
 	reagent_state = LIQUID
+	dermal_absorption = 0.4
 	color = "#003333"
 	strength = 10
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
@@ -82,7 +81,7 @@
 	reagent_state = LIQUID
 	color = "#005555"
 	strength = 8
-	skin_danger = 0.4
+	dermal_absorption = 0.4
 	wiki_flag = WIKI_SPOILER
 	supply_conversion_value = REFINERYEXPORT_VALUE_NO
 	industrial_use = REFINERYEXPORT_REASON_BIOHAZARD
@@ -105,6 +104,7 @@
 	name = REAGENT_HYDROPHORON
 	id = REAGENT_ID_HYDROPHORON
 	description = "An exceptionally flammable molecule formed from deuterium synthesis."
+	dermal_absorption = 1 //same as phoron
 	strength = 80
 	var/fire_mult = 30
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
@@ -119,6 +119,7 @@
 	M.take_organ_damage(0, removed * 0.1) //being splashed directly with hydrophoron causes minor chemical burns
 	if(prob(10 * fire_mult))
 		M.pl_effects()
+	..()
 
 /datum/reagent/toxin/hydrophoron/touch_turf(var/turf/simulated/T)
 	if(!istype(T))
@@ -144,6 +145,7 @@
 	id = REAGENT_ID_LEAD
 	description = "Elemental Lead."
 	color = "#273956"
+	dermal_absorption = 0 //It's lead.
 	strength = 4
 	supply_conversion_value = 0.5 SHEET_TO_REAGENT_EQUIVILENT // has sheet value
 	industrial_use = REFINERYEXPORT_REASON_PRECURSOR
@@ -181,7 +183,7 @@
 	color = "#9D14DB"
 	strength = 30
 	touch_met = 5
-	skin_danger = 1
+	dermal_absorption = 1
 	supply_conversion_value = 5 SHEET_TO_REAGENT_EQUIVILENT // has sheet value
 	industrial_use = REFINERYEXPORT_REASON_PHORON
 	coolant_modifier = 0.85
@@ -215,11 +217,12 @@
 	T.assume_gas(GAS_VOLATILE_FUEL, amount, T20C)
 	remove_self(amount)
 
-/datum/reagent/toxin/cyanide //Fast and Lethal
+/datum/reagent/toxin/cyanide //Fast and Lethal //Fast and lethal my ASS. This shit takes 20 seconds to deal 15 toxins. Eating crayons kills you faster.
 	name = REAGENT_CYANIDE
 	id = REAGENT_ID_CYANIDE
-	description = "A highly toxic chemical."
+	description = "A highly toxic chemical. Prevents cellular respiration, causing moderate amounts of toxins from cell death, the inability to breathe, and eventual loss of consciousness."
 	taste_description = "almond"
+	dermal_absorption = 0 //Splash someone and insta-KO them? No. Make zombie/lich powder for that.
 	taste_mult = 0.6
 	reagent_state = LIQUID
 	color = "#CF3600"
@@ -231,13 +234,16 @@
 /datum/reagent/toxin/cyanide/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	..()
 	M.adjustOxyLoss(10 * removed)
-	M.Sleeping(1)
+	M.AdjustLosebreath(5) //Adjusting oxyloss with no losebreath adjustment is useless.
+	if(dose > 5) //Puts you to sleep if its in your system for too long. This is equivalent to 100 seconds (50 ticks). By this point, you have 75 toxins, ~100 oxyloss, and are good as dead w/o treatment.
+		M.Sleeping(1)
 
 /datum/reagent/toxin/mold
 	name = REAGENT_MOLD
 	id = REAGENT_ID_MOLD
 	description = "A mold is a fungus that causes biodegradation of natural materials. This variant contains mycotoxins, and is dangerous to humans."
 	taste_description = "mold"
+	dermal_absorption = 0
 	reagent_state = SOLID
 	strength = 5
 	wiki_flag = WIKI_SPOILER
@@ -254,6 +260,7 @@
 	id = REAGENT_ID_EXPIREDMEDICINE
 	description = "Some form of liquid medicine that is well beyond its shelf date. Administering it now would cause illness."
 	taste_description = "bitterness"
+	dermal_absorption = 0
 	reagent_state = LIQUID
 	strength = 5
 	filtered_organs = list(O_SPLEEN)
@@ -276,6 +283,7 @@
 	description = "A homemade stimulant with some serious side-effects."
 	taste_description = "sweetness"
 	taste_mult = 1.8
+	dermal_absorption = 0.2 //Made with fertilizer, so some penetration ala organophosphate.
 	color = "#d0583a"
 	metabolism = REM * 3
 	overdose = 10
@@ -308,6 +316,7 @@
 	id = REAGENT_ID_POTASSIUMCHLORIDE
 	description = "A delicious salt that stops the heart when injected into cardiac muscle."
 	taste_description = "salt"
+	dermal_absorption = 0 //it's salt.
 	reagent_state = SOLID
 	color = "#FFFFFF"
 	strength = 0
@@ -336,6 +345,7 @@
 	id = REAGENT_ID_POTASSIUMCHLOROPHORIDE
 	description = "A specific chemical based on Potassium Chloride to stop the heart for surgery. Not safe to eat!"
 	taste_description = "salt"
+	dermal_absorption = 0 //again, it's salt.
 	reagent_state = SOLID
 	color = "#FFFFFF"
 	strength = 10
@@ -362,6 +372,7 @@
 	description = "A strong neurotoxin that puts the subject into a death-like state."
 	taste_description = "numbness"
 	reagent_state = SOLID
+	dermal_absorption = 0 //No splashing someone to isnta KO them.
 	color = "#669900"
 	metabolism = REM
 	strength = 3
@@ -395,6 +406,7 @@
 	description = "A stablized nerve agent that puts the subject into a strange state of un-death."
 	reagent_state = SOLID
 	color = "#666666"
+	dermal_absorption = 0 //Has its own custom affect_touch effect. The parent has this set to 0, but this is just here for the comment.
 	metabolism = REM * 0.75
 	mrate_static = TRUE
 	scannable = SCANNABLE_SECRETIVE
@@ -428,6 +440,7 @@
 	description = "A chemical mix good for growing plants with."
 	taste_description = "plant food"
 	taste_mult = 0.5
+	dermal_absorption = 0.4 //Organo-phosphate poison... Give them a unique effect someday?
 	reagent_state = LIQUID
 	strength = 0.5 // It's not THAT poisonous.
 	color = "#664330"
@@ -467,6 +480,7 @@
 	name = REAGENT_PLANTBGONE
 	id = REAGENT_ID_PLANTBGONE
 	description = "A harmful toxic mixture to kill plantlife. Do not ingest!"
+	dermal_absorption = 0.1 //Very weak.
 	taste_mult = 1
 	reagent_state = LIQUID
 	color = "#49002E"
@@ -505,6 +519,7 @@
 	id = REAGENT_ID_SIFSAP
 	description = "A natural slurry comprised of fluorescent bacteria native to Sif, in the Vir system."
 	taste_description = "sour"
+	dermal_absorption = 0 //Bacteria.
 	reagent_state = LIQUID
 	color = "#C6E2FF"
 	strength = 2
@@ -577,6 +592,7 @@
 	id = REAGENT_ID_THERMITEV
 	description = "A biologically produced compound capable of melting steel or other metals, similarly to thermite."
 	taste_description = "sweet chalk"
+	dermal_absorption = 0 //It's a powder/solid.
 	reagent_state = SOLID
 	color = "#673910"
 	touch_met = 50
@@ -629,6 +645,7 @@
 	description = "Lexorin temporarily stops respiration. Causes tissue damage."
 	taste_description = "acid"
 	reagent_state = LIQUID
+	dermal_absorption = 0.2 //Causes tissue damage, so can be presumed to penetrate through the skin somewhat.
 	color = "#C8A5DC"
 	overdose = REAGENTS_OVERDOSE
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED

code/modules/reagents/reagents/virology.dm

@@ -4,6 +4,7 @@
 	description = "Liquid vaccine against some type of virus."
 	color = "#C81040"
 	scannable = SCANNABLE_BENEFICIAL
+	dermal_absorption = 0.25 //Give virology the ability to make vaccine patches.
 	taste_description = "antibodies"
 	supply_conversion_value = REFINERYEXPORT_VALUE_COMMON
 	industrial_use = REFINERYEXPORT_REASON_MEDSCI

code/modules/reagents/reagents/vore_vr.dm

@@ -10,6 +10,7 @@
 	reagent_state = LIQUID
 	color = "#FFFF00" // rgb: 255, 255, 0
 	metabolism = 0.01
+	dermal_absorption = 1 //Grow patches.
 	scannable = SCANNABLE_BENEFICIAL
 	mrate_static = TRUE
 	supply_conversion_value = REFINERYEXPORT_VALUE_GODTIER
@@ -28,6 +29,7 @@
 	reagent_state = LIQUID
 	color = "#800080"
 	metabolism = 0.01
+	dermal_absorption = 1 //Shrink patches
 	mrate_static = TRUE
 	supply_conversion_value = REFINERYEXPORT_VALUE_GODTIER
 	industrial_use = REFINERYEXPORT_REASON_MEDSCI
@@ -46,6 +48,7 @@
 	reagent_state = LIQUID
 	color = "#00FFFF"
 	metabolism = 0.01 //One unit will be just enough to bring someone from 200% to 100%
+	dermal_absorption = 1
 	mrate_static = TRUE
 	supply_conversion_value = REFINERYEXPORT_VALUE_GODTIER
 	industrial_use = REFINERYEXPORT_REASON_MEDSCI
@@ -253,10 +256,11 @@
 	description = "A potent toxin commonly found in a plethora of species. When exposed to the toxin, causes extreme, paralysis for a prolonged period, with only essential functions of the body being unhindered. Commonly used by covert operatives and used as a crowd control tool."
 	taste_description = "bitterness"
 	reagent_state = LIQUID
+	dermal_absorption = 0 //Too strong.
 	color = "#37007f"
 	metabolism = REM * 0.25
 	overdose = REAGENTS_OVERDOSE
-	scannable = 0 //YOU ARE NOT SCANNING THE FUNNY PARALYSIS TOXIN. NO. BAD. STAY AWAY.
+	scannable = 1 //As I found out, this only means if you can detect it or not. Sad.
 	supply_conversion_value = REFINERYEXPORT_VALUE_HIGHREFINED
 	industrial_use = REFINERYEXPORT_REASON_WEAPONS
 
@@ -275,7 +279,7 @@
 	metabolism = 0.1 //Lasts up to 50 seconds if you give 5 units.
 	mrate_static = TRUE
 	overdose = 100 //There is no OD. You already are taking the worst of it.
-	scannable = 0 //Let's not have medical mechs able to make an extremely strong 'I hit you you fall down in agony' chem.
+	scannable = 1
 	supply_conversion_value = REFINERYEXPORT_VALUE_PROCESSED
 	industrial_use = REFINERYEXPORT_REASON_WEAPONS