Mercury Compounds
Notable concerns
INCI · MercuryCAS 7439-97-6
Also known as: Thiomersal · Mercuric Oxide
PreservativeConditioning
In plain language
Highly toxic inorganic compounds historically used as skin-lightening agents and eye makeup preservatives.
Causes severe neurological and kidney damage; easily absorbed through the skin.
Where it can be sold
Simplified regulatory status by market — for guidance, not compliance advice.
European UnionNot permitted
Strictly prohibited in all cosmetic formulations.