Mercuric Oxide

Highly toxic - systemic absorption causes nephrotoxicity, neurotoxicity, and bioaccumulation; classified as toxic to reproduction; environmental persistent pollutant; a frequent contaminant found in illegally marketed skin-lightening products.. Red or yellow inorganic mercury(II) compound (HgO); historical use predates modern toxicology; its presence in any cosmetic product is an automatic regulatory violation in both the EU and US. The EU classifies Mercuric Oxide as "prohibited". Safety rating: MODERATE.

Mercuric Oxide EU regulatory status: prohibited. This is based on EU Regulation 1223/2009 and its amendments.

Mercuric Oxide functions as: Historically used as an antimicrobial/preservative and in skin-lightening formulations. No legitimate current cosmetic function.. It is classified as a cosmetic ingredient in our database. CAS number: 21908-53-2.

not established The Margin of Safety (MoS) is calculated using SCCS methodology. A MoS above 100 is generally considered safe. Use the MoS Calculator tool to calculate MoS for your specific formulation and product category.

Mercuric Oxide carries a GHS signal word of "DANGER". Hazard statements: Fatal if swallowed Toxic in contact with skin May cause damage to kidneys May cause damage to nervous system and kidneys through prolonged or repeated exposure Very toxic to aquatic life with long lasting effects. This classification is based on the ILO/WHO International Chemical Safety Card and ECHA C&L inventory data. Note: GHS classification applies to the pure substance — at cosmetic use concentrations, hazard thresholds may not be met.