Acid Orange 3

Description

yellow ea · CAS 6373-74-6 · C18H13N4NaO7S. UNII P0XV7XM57J. Melting Point: 399 to 403 °F (NTP, 1992); Solubility: 1 to 10 mg/mL at 77 °F (NTP, 1992).

Identification

CAS Registry Number	6373-74-6
PubChem CID	5284435
Molecular formula	C18H13N4NaO7S
IUPAC name	sodium 2-anilino-5-(2,4-dinitroanilino)benzenesulfonate
UNII (FDA)	P0XV7XM57J

Computed Descriptors

Molecular Weight	452.4
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	4
Exact Mass	452.04026422
Monoisotopic Mass	452.04026422
Topological Polar Surface Area	181
Heavy Atom Count	31
Formal Charge	0
Complexity	698

Physical & Chemical Properties

Melting Point	399 to 403 °F (NTP, 1992)
Solubility	1 to 10 mg/mL at 77 °F (NTP, 1992)

Physical description & handling notes

• C.i. acid orange 3 is a brown to dark brown microcrystalline powder. (NTP, 1992)
• Dark orange-brown solid; [HSDB]
• Dark orange-brown microcrystals
• Very soluble in water and ethanol

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Cosmetic ingredients (Acid Orange 3) -> CIR (Cosmetic Ingredient Review) CIR / INCI: Hair dyeing
GHS notification summary	22.1% (49 / 222)

GHS Hazard Classification

GHS notification summary	22.1% (49 / 222)
Reported hazard statements	H315 (13.1%), H317 (42.8%), H318 (17.1%), H319 (18%), H335 (13.1%)

Documented Uses

• Used to dye wool, nylon, silk, acetate, and leather; Also used in soaps, wood stains, and hair coloring products; [HSDB]
• Leather Tanning and Processing [Category: Industry]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• Dressing Hair [Category: Other]
• DYE FOR WOOL, NYLON, SILK AND LEATHER; SHADING COMPONENT IN SOAPS AND WOOD STAINS (LIMITED USE)
• Information on 1 consumer products that contain C.I. Acid Orange 3 in the following categories is provided:

Synonyms

Acid Orange 3; C.I. Acid Orange 3; 6373-74-6; Amido yellow EA; Amido Yellow E; Acid Yellow E; Airedale Yellow E; CI 10385; DTXSID1021081; Sodium 2-anilino-5-(2,4-dinitroanilino)benzenesulphonate; P0XV7XM57J; sodium;2-anilino-5-(2,4-dinitroanilino)benzenesulfonate; Acid Orange 3, Technical Grade; Benzenesulfonic acid, 5-((2,4-dinitrophenyl)amino)-2-(phenylamino)-, monosodium salt; Derma Yellow P; Fenalan Yellow E

Frequently Asked Questions

What are the CAS number and molecular formula of yellow ea?

CAS 6373-74-6; molecular formula C18H13N4NaO7S; molecular weight — g/mol.

What other names is yellow ea known by?

Acid Orange 3, C.I. Acid Orange 3, 6373-74-6, Amido yellow EA, Amido Yellow E, Acid Yellow E.

What is the regulatory status of yellow ea?

Documented regulatory listings: CIR / INCI: Cosmetic ingredients (Acid Orange 3) -> CIR (Cosmetic Ingredient Review); CIR / INCI: Hair dyeing.

Is yellow ea classified as hazardous?

22.1% of GHS notifications report no hazard classification (49 of 222).

What are the key physical properties of yellow ea?

Melting Point: 399 to 403 °F (NTP, 1992); Solubility: 1 to 10 mg/mL at 77 °F (NTP, 1992).

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.