Acid Orange 24

Independent reference data for Acid Orange 24 (CAS 1320-07-6), compiled from public chemistry databases.

Registry identifiers across databases

Computed descriptors

Physicochemical values on record

Documented uses on record

EPA Safer Chemical Functional Use Classes -> ColorantsSafer Chemical Classes -> Yellow triangle - The chemical has met Safer Choice Criteria for its functional ingredient-class, but has some hazard profile issues

Synonyms and trade names

D&C Brown No. 1; Acid orange 24; D & C Brown no. 1; 1320-07-6; AO24 dye; EINECS 215-296-9; CI 20170; 8796B4I6HE; C.I. ACID ORANGE 24, MONOSODIUM SALT; Benzenesulfonic acid, 4-((3-((dimethylphenyl)azo)-2,4-dihydroxyphenyl)azo)-, monosodium salt; DTXSID7041708; BROWN 1; Sodium 4-((3-((dimethylphenyl)azo)-2,4-dihydroxyphenyl)azo)benzenesulphonate; Sodium 4-[[3-[(dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]benzenesulphonate; Benzenesulfonic acid, 4-[[3-[(dimethylphenyl)azo]-2,4-dihydroxyphenyl]azo]-, monosodium salt; Benzenesulfonic acid, 4-(2-(3-(2-(dimethylphenyl)diazenyl)-2,4-dihydroxyphenyl)diazenyl)-, sodium salt (1:1)

Regulatory listings held on file

Regulatory & Food Contact	FDA Regulatory Status of Color Additives: Cosmetics CIR / INCI: Hair dyeing
GHS notification summary	10.9% (5 / 46)

GHS hazard classification

GHS notification summary	10.9% (5 / 46)
Reported hazard statements	H315 (89.1%), H319 (89.1%), H335 (84.8%)

This chemical does not meet GHS hazard criteria for 10.9% (5 of 46) of reports.

H315 (89.1%): Causes skin irritation [Warning Skin corrosion/irritation]

What the public record says

Acid Orange 24 · CAS 1320-07-6 · C20H17N4NaO5S. UNII 8796B4I6HE. Color Additive Status: 74.2151.

Physical description and handling notes

Source: PubChem / Wikidata; the batch COA governs where values differ.