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2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-((2-methylphenyl)azo)- and its salts, when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
ACID RED 52
High concern
Sources 7
ACID RED 73
Canonical ingredient
Acid Red 73 (CI 27290), when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
Hydrogen 3,6-bis(diethylamino)-9-(2,4-disulphonatophenyl)xanthylium, sodium salt; CI 45100 (see note 17) is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.
ACID RED 73
Critical concern
Sources 5Synced Jan 2008
Acid Red 73 (CI 27290), when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.
Acid red 163
Minor concern
Sources 5Synced May 2026
Disodium 4,6-dihydroxy-3-[[4-[1-[4-[[1-hydroxy-7-[(phenylsulphonyl)oxy]-3-sulphonato-2-naphthyl]azo]phenyl]cyclohexyl]phenyl]azo]naphthalene-2-sulphonate is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).
C.I. Acid Red 1
Minor concern
Sources 5Synced Jan 2008
Disodium 5-acetylamino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate is listed in Annex IV of the EU Cosmetics Regulation (EC) 1223/2009 (colorants allowed in cosmetic products).
C.I. Acid Red 52
Low concern
Sources 5Synced Mar 2001
EPA CPDat observed this chemical in 71 composition records across product categories including Laboratory supplies, Raw materials, Cleaning and safety.