N,N-DIETHYLTOLUENE-2,5-DIAMINE HCL

Other

40

Caution

CAS Number: 2051-79-8

About N,N-DIETHYLTOLUENE-2,5-DIAMINE HCL

A toluene-diamine salt used as a hair dye precursor, restricted in the EU due to sensitization and potential carcinogenicity concerns.

Detailed Analysis

N,N-Diethyltoluene-2,5-diamine hydrochloride is a substituted toluene diamine used as a primary intermediate in oxidative hair dyes. It is listed in EU CosIng Annex II under restriction II/1310, limiting its use to hair dye applications with strict concentration limits. The 2,5-diamine substitution pattern and the presence of the hydrochloride salt increase concerns compared to the free base. Similar to other aromatic amine hair dye precursors, it is classified as a potent skin sensitizer.

Skin Benefits

  • ✓ Primary hair dye intermediate that develops color in oxidative formulations

Known Concerns

  • ⚠ EU CosIng Annex II/1310 restricts use to hair dye applications with concentration limits
  • ⚠ Potent skin sensitizer — risk of allergic contact dermatitis
  • ⚠ Like other aromatic amine hair dye intermediates, requires strict handling and labeling
  • ⚠ Mandatory precautionary labeling in EU member states

Safety Score

40

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.