Restricted hair dye amine
Toluene-2,5-diamine Toluene-2,5-diamine sulphate
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
An aromatic amine commonly used in permanent hair dyes for dark shades. Strictly limited under EU Annex III because it is a well known skin sensitizer with potential for serious allergic reactions.
Skin benefits
- Effective oxidative hair dye precursor for darker shades
- Provides long lasting color in permanent hair dye systems
Known concerns
- Strong skin sensitizer and known contact allergen
- Restricted under EU Annex III with strict maximum concentration limits
- Patch testing strongly recommended before use
- Cross reactivity with PPD and other aromatic amine hair dyes
- Can cause severe allergic reactions including swelling and blistering
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.