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  • industrial

Direct red 81

CAS 2610-11-9 · 100/100 · High conf.

Also registered as 2 other CAS numbers

12237-71-7 · 134092-10-7

Concern score

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

Direct red 81 in plain language

What it is

Also known as C.I. Direct Red 81 disodium salt · Airedale Red KD · C.I. Direct Red 81 · Chlorantine fast red 5B · Direct Red 81 disodium salt · Sirius supra red 4B

Show all 8 names

Solaminrot 4B · Triantine light red 4BN

What it does

Used in cosmetics as a hair dye.

  • Hair dyeing
  • Colourant
Is it a concern?
Critical concern: no hazard classifications on record. It is banned in EU cosmetics.

Why it's flagged

2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]- and its salts, when used as a substance in hair dye products is prohibited in cosmetic products under Annex II of the EU Cosmetics Regulation (EC) 1223/2009.

RestrictedEU EC — banned

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 II — prohibited
  • EU prohibited in cosmetics

Recorded in these product areas

  • Found in consumer products
  • Industrial

  • EUEC

    Annex II of EU Cosmetics Regulation (EC) 1223/2009: substances prohibited in cosmetic products.

    banned
    View source →
  • EUCosIngActive2 entries
  • USEPAcommercial use observedEPA CPDat observed this chemical in 2 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.
    • EPA CPDat observed this chemical in 2 composition records across product categories including unclassified products. EPA CPDat classifies this chemical for functional uses including Dye.Source →
  • USFDAlisted in openFDA substanceopenFDA substance registry classifies this ingredient as chemical.
    • openFDA substance registry classifies this ingredient as chemical.Source →

Expert safety opinions

No expert opinion on file for Direct red 81. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

  • 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.

Evidence & sources

No graded research studies for Direct red 81 yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

6 data sources

Where this comes from

  • CosIng

    regulatory · updated 2026-09-23

    Open →

  • EU CosIng Cosmetics Regulation Annexes

    regulatory · updated 2010-10-15

    Open →

  • EPA Chemical and Products Database

    exposure · updated January 7, 2008

    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.

Fragrance avoidance

No fragrance-linked caution surfaced in the current profile.

Good fit

This ingredient does not currently read as a fragrance-linked driver in the published evidence and hazard profile.

Where it has been recorded

How often EPA CPDat has listed Direct red 81 in a product composition. These are source records, not Greenveil catalog products.

Source records

2

Named organisations

2

Typical roles

Hair dyeingColourant
See products using Direct red 81 →