3,4-DIAMINOBENZOIC ACID

Other

38

Caution

CAS Number: 619-05-6

About 3,4-DIAMINOBENZOIC ACID

A benzene diamine derivative used exclusively as a hair dye precursor in oxidative colouring systems. Heavily restricted in the EU; a known sensitizer that requires coupling with hydrogen peroxide.

Detailed Analysis

3,4-Diaminobenzoic acid is a primary intermediate for oxidative (permanent) hair dye formulations, listed under EU Annex II reference II/1229. Like all paraphenylenediamine (PPD) family hair dye intermediates, it is a potent skin sensitizer that requires coupling with hydrogen peroxide in a 2-step process to form the final colour in situ. It is restricted exclusively to oxidative hair dye use and cannot be used in non-oxidative or direct dye formulations.

What It Does

HAIR DYEING

Known Concerns

  • ⚠ EU Annex II hair dye restriction (II/1229)
  • ⚠ Known strong skin and respiratory sensitizer
  • ⚠ Must only be used in oxidative (2-step) hair dye systems
  • ⚠ Free base form is more sensitising than coupled dyes

Safety Score

38

Caution

Based on EU regulatory data, published safety research, and ingredient function analysis.

References

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EU CosIng Database

European Commission cosmetic ingredient registry

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This information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.