4-AMINO-2-HYDROXYTOLUENE SULFATE
Other
Moderate
CAS Number: 183293-62-1
About 4-AMINO-2-HYDROXYTOLUENE SULFATE
An aromatic amine sulfate used in oxidative hair dye formulations; a known sensitizer that may cause allergic contact dermatitis.
Detailed Analysis
4-Amino-2-Hydroxytoluene Sulfate is a hair colorant precursor that functions as a coupling agent in oxidative (permanent) hair dye systems. It is not currently listed in the EU Cosmetics Regulation Annexes with concentration limits, but hair dye intermediates of this class are subject to general safety assessment. It is a known skin sensitizer and must be declared in INCI lists. The sulfate salt mitigates some oxidation instability issues.
What It Does
Known Concerns
- ⚠ Skin sensitization potential
- ⚠ Cross-reactivity with other aromatic amine hair dye intermediates
- ⚠ Requires protection against oxidation during formulation
Safety Score
Moderate
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.