Acid Orange 3

AKA: C.I. Acid Orange 3, 6373-74-6, Amido yellow EA, Amido Yellow E, Acid Yellow E, Airedale Yellow E, CI 10385, Sodium 2-anilino-5-(2, 4-dinitroanilino)benzenesulphonate

Synthetic

Acid

Not Clean

OriginDerived from aromatic compounds within the azo dye chemical family synthesized from petroleum-based precursors. Produced through diazotization and azo coupling reactions of aromatic amines and phenolic compounds.

Sodium 2-anilino-5-(2,4-dinitroanilino)benzenesulphonate (CI 10385)

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

Formula

C18H13N4NaO7S

Mol. Weight

452.40

CAS #

6373-74-6

Form

Powder

State

C.i. acid orange 3 is a brown to dark brown microcrystalline powder. (NTP, 1992)

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Caution

Functions

Hair Dyeing

Colors Hair

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory0 listings

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Reviewed by CIR

Pregnancy

Caution

Regulatory Status

USAunder review

EU✔ permitted

JAPAN✔ permitted

CANADA✔ permitted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: PubChem · CosIng · EWG · CIR