CI 15510- ▸ Cosmetic colorant: Orange shade in formulated personal-care products
- ▸ Hair dye: Non-reactive dye in hair-coloring products
- ▸ Biological stain: Staining reagent in laboratory use
- ▸ Industrial dye: Colorant for compatible systems
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →D&C Orange No. 4 (C.I. Acid Orange 7 / Orange II, CI 15510, CAS 633-96-5), a monoazo acid dye. Industry references record use as a dye, a cosmetic colorant including non-oxidative and oxidative hair dyes, and a biological stain. Supplied as an orange powder.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 211-199-0
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is D&C Orange No. 4?
D&C Orange No. 4 (CAS 633-96-5; C.I. Acid Orange 7 / Orange II, CI 15510) is a monoazo acid dye supplied as an orange powder. It is used as a dye, a cosmetic colorant including in hair dyes, and a biological stain.
What is D&C Orange No. 4 used for?
It is used as an orange colorant in formulated personal-care products, as a non-reactive dye in hair-coloring products, as a biological stain in laboratory use, and as an industrial colorant for compatible systems.
What is the difference between FD&C and D&C colorants?
FD&C and D&C are color-additive naming categories distinguished by their permitted application scopes; D&C Orange No. 4 carries the D&C designation. The label refers to the naming convention, not a quality grade.
What other names does D&C Orange No. 4 go by?
D&C Orange No. 4 is also known as C.I. Acid Orange 7, Orange II, and CI 15510. The CAS number is 633-96-5 and the formula is C16H11N2NaO4S.
How is D&C Orange No. 4 supplied in bulk?
RawSource supplies D&C Orange No. 4 as an orange powder in bulk packaging. Request a current CoA and SDS to confirm dye content and specifications, along with a bulk quote for your volume.
What is the REACH and TSCA regulatory status of D&C Orange No. 4 (Acid Orange 7, Orange II)?
D&C Orange No. 4 (Acid Orange 7, Orange II) (CAS 633-96-5) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 211-199-0).