TBHQ
Tertiary [bio-molecular structure] Butylhydroquinone in which a third tier derivative form of Hydroquinone of which the base element is used in photographic development and skin whitening (which is banned in some countries) by being combined with alpha hydroxy acids that exfoliate the skin and it can also cause skin sensitivity. The FDA stated that hydroquinone cannot be ruled out as a potential carcinogen.
- Farnesyl hydroquinone derivatives are the principal irritants exuded by the poodle-dog bush, which can cause severe contact dermatitis in humans.
- Hydroquinone is thought to be the active toxin in Agaricus hondensis mushrooms.