Ammonium Hydroxide

EU Annex III restricted ingredient under Regulation (EC) No 1223/2009 with maximum 6% as NH3 in finished product and mandatory label declaration of Contains Ammonia above 2% as NH3. CIR (2018): safe as used in hair dyes/colors and safe in cosmetics applied to skin when formulated to be non-irritating. FDA GRAS as direct food ingredient per 21 CFR 184.1139 but inadequate data for OTC skin protectant GRASE. Primary function is pH adjustment and denaturant. Used in 1,354 products per 2017 VCRP data with 81.5% in hair coloring. Safety is conditional on finished-product pH and free ammonia concentration control. The EU classifies Ammonium Hydroxide as "restricted". Safety rating: MODERATE.

Ammonium Hydroxide EU regulatory status: restricted. Maximum allowed concentration: 6% as NH3. This is based on EU Regulation 1223/2009 and its amendments.

Ammonium Hydroxide functions as: pH adjuster, buffering agent, denaturant. It is classified as a cosmetic ingredient in our database. CAS number: 1336-21-6.

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.

Ammonium Hydroxide carries a GHS signal word of "DANGER". Hazard statements: May be osive to metals Harmful if swallowed Causes severe skin burns and eye damage May cause respiratory irritation Very toxic to aquatic life. 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.