Aqua fortis

Aqua fortis is a item in Azrael's Tear.

Background
Glass flask with a corrosive chemical labelled AQUA FORTIS. The Latin name refers to nitric acid, HNO3, highly reactive, oxidizing liquid that was used to dissolve metals in alchemy. In modern times, it's a vital component of fertilizers, explosives, rocket fuels, and various industrial processes.

Function

 * Used to create a concoction to defuse the toxin at the alchemist lab, unrust the lever on the cart, and ultimately scare Sasha off.