Acid

acid

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When on/in other objects/liquids:
acidic liquid acid-covered object acid-stained object
Vaporizes at	100°, into corrosive gas
Base temperature	25°
Damage Type	Acid
Cooking Effect	simple acid-based effects
Value per dram	1.5
Weight per dram	0.25#
Evaporativity	1
Fluidity	30
Cleaning factor	30
Prompt to wade through?	yes
Prompt to drink?	yes
ID	AcidPool, AcidPuddle, AcidCanteen_Ingredient
Liquid ID	acid
Infobox data from game version 2.0.201.72

Acid is a caustic liquid that causes damage upon contact. A composite liquid with acid will be acidic, and objects covered in it will be covered in acid. Because of its properties, only inorganic containers will be able to hold acid safely without dissolving, such as a canteen or a glass bottle.

Physical contact with acid will cause the object to take Total liquid Volume * Acid drams /16 (min 1) to Total liquid Volume * Acid drams (min 2) acid damage every turn. This includes the container the acid is in if the container is organic like a waterskin. Liquid containers corroded by acid will have sizzling prepended to their name until the container is completely destroyed. If destroyed within an inventory, the acid will pour over the owner, dealing the same damage. Waterskins have a hidden 30HP, so acid can be held for a short period of time, depending on volume, for short liquid transfer. Any items, regardless of material, will be damaged if sufficiently covered in acid.

Creatures with full acid resistance will not take damage from stepping on or swimming in acid, but acid still has a chance of damaging/destroying the creature's feet armor when stepping on acid, as well as their body armor if swimming in an acid pool (greater than 1,000 drams). Armor composed of organic material is especially vulnerable.

Evaporation

When heated to a temperature of 350, the acid will evaporate into corrosive gas, with a density of the puddle's volume in drams/20. The acid created by fuming vents also evaporates quickly, regardless of temperature. Trying to pour or collect acid that is about to evaporate gives the message "It's fizzy." and the action fails.

Sources of Acid

acid weeps and giant acid weeps, which can be found in fungal biomes, the Rainbow Wood, historic sites, or occasionally in other locations. In a fungal biome, the dandy caps and spotted shagspooks around acid weeps will be bright green or dull green in color.
Secreted by acidic humors, gyrohumors and panhumors, both when they move and when they die.
Spit by spitting slugs and also left behind on death.
Often sold by ichor merchants, one of which is guaranteed to spawn in the Stiltgrounds.
More rarely sold by kippers (one also guaranteed) and chefs.
A single dram is sold by the alchemist.