C.I.酸性橙24

Description

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

Identification

CAS Registry Number	1320-07-6
PubChem CID	23675104
Molecular formula	C20H17N4NaO5S
IUPAC name	sodium 4-[(2Z)-2-[(5E)-5-[(2,4-dimethylphenyl)hydrazinylidene]-4,6-dioxocyclohex-2-en-1-ylidene]hydrazinyl]benzenesulfonate
UNII (FDA)	8796B4I6HE

Computed Descriptors

Molecular Weight	448.4
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	5
Exact Mass	448.08173511
Monoisotopic Mass	448.08173511
Topological Polar Surface Area	149
Heavy Atom Count	31
Formal Charge	0
Complexity	872

Physical & Chemical Properties

Color Additive Status	74.2151

Physical description & handling notes

• D&C Brown No. 1
• Cosmetics
• Externally applied cosmetics.

Regulatory Status

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%)

Documented Uses

• EPA Safer Chemical Functional Use Classes -> Colorants
• Safer Chemical Classes -> Yellow triangle - The chemical has met Safer Choice Criteria for its functional ingredient-class, but has some hazard profile issues
• Information on 3 consumer products that contain D&C Brown #1 in the following categories is provided:
• Benzenesulfonic acid, 4-[2-[3-[2-(dimethylphenyl)diazenyl]-2,4-dihydroxyphenyl]diazenyl]-, sodium salt (1:1): ACTIVE

Synonyms

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)

Frequently Asked Questions

What are the CAS number and molecular formula of Acid Orange 24?

CAS 1320-07-6; molecular formula C20H17N4NaO5S; molecular weight — g/mol.

What other names is Acid Orange 24 known by?

D&C Brown No. 1, Acid orange 24, D & C Brown no. 1, 1320-07-6, AO24 dye, EINECS 215-296-9.

What is the regulatory status of Acid Orange 24?

Documented regulatory listings: FDA Regulatory Status of Color Additives: Cosmetics; CIR / INCI: Hair dyeing.

Is Acid Orange 24 classified as hazardous?

10.9% of GHS notifications report no hazard classification (5 of 46).

What are the key physical properties of Acid Orange 24?

Color Additive Status: 74.2151.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.