In the world outside The Witcher universe, Vitriol is an archaic name for sulfate. The name comes from Latin "vitreolum", which means "glassy". It is unknown if real-world sulfates have anything in common with Vitriol of The Witcher universe.
Vitriol, indicated in blue, is a basic alchemical substance. It is found in many ingredients, including herbs, minerals and monster parts. This category contains all ingredients with vitriol as their primary substance. For more vitriol ingredients which also contain secondary substances like Albedo, Nigredo and Rubedo, see the subcategories shown below.
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