On 29 May 2024, the European Chemicals Agency (ECHA) published Sweden’s proposal of an harmonised classification and labelling (CLH) for several strontium compounds, some of which can currently be used in cosmetics, as “Reprotoxic category 1B”.
Four of the 12 substances targeted by Sweden are found in Cosing. • Strontium nitrate (No.CAS: 10042-76-9, No.CE: 233-131-9, INCI: Strontium Nitrate) is listed in the Cosing with the functions: Oral care, Skin conditioning. It is already included in Annex II/403 (Prohibited substances) of European Cosmetics Regulation 1223/2009.
• Strontium acetate (No.CAS: 543-94-2, No.CE: 208-854-8, INCI: Strontium Acetate) is listed in the Cosing with the functions: Oral care, Soothing. It is included in Annex III/58 (Restricted substances) of Regulation 1223/2009 which limits its use to oral products at a maximum concentration of 3.5%.
• Strontium chloride (No.CAS: 10476-85-4, No.CE: 233-971-6, INCI: Strontium Chloride) is listed in the Cosing with the functions: Oral care, Skin conditioning, Soothing. It is included in Annex III/57 of Regulation 1223/2009 which limits its use to oral products at a maximum concentration of 3.5% and to shampoos and face products at a maximum concentration of 2.1%.
• Strontium hydroxide (No.CAS: 18480-07-4 / 1311-10-0, No.CE: 242-367-1, INCI: Strontium hydroxide) is listed in the Cosing with the function: Buffering. It is included in Annex III/63 of Regulation 1223/2009 which limits its use to its function as a pH adjuster for depilatories at a maximum concentration of 3.5%. None …
