Description
Trinickel tetrasulfide is an inorganic compound of the metal sulfide family, specifically a nickel sulfide in which three nickel atoms combine with four sulfur atoms.
At the regulatory level in the European Union, Trinickel tetrasulfide is listed in Annex II of Regulation (EC) No 1223/2009 on cosmetic products under reference 1447, which lists the substances prohibited in the composition of cosmetic products marketed in the EU. This listing means that the substance cannot be incorporated as an ingredient in cosmetic formulations intended for the European market at any concentration or under any condition of use. The substance also has a harmonized classification as Carcinogen Category 1A under Regulation (EC) No 1272/2008 (CLP), a category reserved for substances with known carcinogenic capacity in humans, based largely on human evidence.
The presence of a substance in this annex reflects a regulatory decision of total exclusion. The information presented is for technical reference only and does not constitute a recommendation for use or an efficacy claim.