ACID BLUE 3 is graded A (Safe) by Expert·ING, based on EU COSING Annex IV regulatory data.

ACID BLUE 3

Ethanaminium, N-(4-((4-(diethylamino)phenyl)(5-hydroxy-2,4-disulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethylhydroxide, inner salt, calcium salt (2:1) and its insoluble barium, strontium and zirconium lakes, salts and pigments

Safety grade: A

This colorant is permitted in EU cosmetics but restricted to certain product types or conditions of use under EU Cosmetics Regulation (EC) No 1223/2009. To be sold legally in the EU or UK, a product must meet these conditions.

Graded using: EU COSING Annex IV.

• EU COSING — Permitted

Last verified: June 9, 2026