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Acid orange 7

CAS 75025-97-7 · 70/100 · High conf.

Also registered as 3 other CAS numbers

84842-86-4 · 161628-32-6 · 633-96-5

Concern score

70/100High concern based on regulatory listings.
High confidence

Acid orange 7 in plain language

What it is

On cosmetic ingredient lists it appears as “CI 15510”.

Also known as CI 15510 · Orange ii · C.I. Acid Orange 7 · D&C orange no. 4 · DAIDAI205 · Orange 4

Show all 16 names

C.I. NO.15510 (D&C orange NO.4) · Dc orange no. 4 · 11550 Orange · 2-Naphthol Orange II · Acid Orange II · acid orange 7 / ci 15510 · d and c orange no. 4 · d&c orange #4 · d&c orange 4 · orange 7

What it does

Used in cosmetics as a colourant and a hair dye. Acid Orange 7 is classed chemically as a monoazo colour (see also CI 15510).

  • Colorant
  • Hair dyeing
  • Colourant
  • Fragrance
Is it a concern?
High concern: no hazard classifications on record. It is restricted in EU cosmetics.

Why it's flagged

Sodium 4-[(2-hydroxy-1-naphthyl)azo]benzene sulfonate is restricted in cosmetic products under Annex III of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — restricted

The score describes this ingredient's chemical identity — its hazard profile from published classifications and regulatory status — not the safety of any product it appears in.

Regulation

Restrictions first, then routine listings from published regulatory sources.

  • EU Annex III — restricted
  • EU Annex IV — permitted colorant
  • EU permitted colorant
  • EU restricted in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Beauty
  • Cleaning
  • Industrial

  • EUEC

    Annex III of EU Cosmetics Regulation (EC) 1223/2009: substances which cosmetic products must not contain except subject to the restrictions laid down. Product types: Hair dye substance in non-oxidative hair dye products. Maximum concentration: As from 3 June 2021: 0,5 %.

    restricted
    View source →
  • EUCosIngActive4 entries
    • Acid Orange 7 is classed chemically as a monoazo colour (see also CI 15510). It conforms to the formula: Restriction: III/318Source →
    • CI 15510 is classed chemically as a monoazo colour. It conforms to the formula: Restriction: IV/21Source →
    • Cosmetics Regulation annex III / ref 318.Source →
    • Cosmetics Regulation annex IV / ref 21.Source →
  • EUECallowed_listedAnnex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Not to be used in eye products
    • Annex IV of EU Cosmetics Regulation (EC) 1223/2009: colorants allowed in cosmetic products. Maximum concentration: Not to be used in eye productsSource →
  • EUEFSAEFSA opinionOpinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food on a request from the Commission to Review the toxicology of a number of dyes illegally present in food in the EU (EFSA AFC)
    • Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food on a request from the Commission to Review the toxicology of a number of dyes illegally present in food in the EU (EFSA AFC)Source →
  • USEPAcommercial use observedEPA CPDat observed this chemical in 247 composition records across product categories including Raw materials, Cleaning products and household care, Personal care. EPA CPDat classifies this chemical for functional uses including Dye, Fragrance.
    • EPA CPDat observed this chemical in 247 composition records across product categories including Raw materials, Cleaning products and household care, Personal care. EPA CPDat classifies this chemical for functional uses including Dye, Fragrance.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

Independent scientific assessments cited by the records we hold, with the year and link where the record gives one.

  • SCCS

    EU Scientific Committee on Consumer Safety

    No SCCS opinion on file.

  • CIR

    Cosmetic Ingredient Review (US expert panel)

    No CIR safety assessment on file.

  • EFSA

    European Food Safety Authority

    • Opinion of the Scientific Panel on Food Additives, Flavourings, Processing Aids and Materials in Contact with Food on a request from the Commission to Review the toxicology of a number of dyes illegally present in food in the EU (EFSA AFC)

      2005 · EU EFSA listing · Read the source →

Evidence & sources

No graded research studies for Acid orange 7 yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

7 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2020-11-24

    Open →

  • EFSA OpenFoodTox

    regulatory · updated 2026-10-04

    Open →

  • EPA Chemical and Products Database

    exposure · updated september 8, 2015

    Open →

  • EPA DSSTox Identifiers

    chemistry · updated 2025-12-29

    Open →

  • FDA GSRS UNII

    registry · updated 2026-02-26

    Open →

  • openFDA Substance

    registry · updated 2026-05-24

    Open →

Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Food use

Food-use source coverage is present in the current record.

Good fit

The ingredient appears in food-oriented source coverage or allowed-use references, which makes food use easier to support than a context with no domain signal at all.

Fragrance avoidance

Not a strong fit for fragrance avoidance because it carries Fragrance.

Avoid

The ingredient itself is a fragrance-linked signal, so it is better treated as an avoid case when fragrance exposure is the main concern.

Where it has been recorded

How often EPA CPDat has listed Acid orange 7 in a product composition. These are source records, not Greenveil catalog products.

Source records

247

Named organisations

6

Raw materialsCleaning products and household carePersonal careConstructionCleaning and safety

Typical roles

ColorantHair dyeingColourantFragrance
See products using Acid orange 7 →

Catalog

Found in these products

Their ingredient lists include Acid orange 7; each product's own rating depends on its whole formula, so it is shown on the product page, not here.

See all 96 →Find products without it →