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A hair dye ingredient used in permanent hair coloring formulations.
May aggravate
Safety summary
Can cause allergic reactions in some individuals. Use in hair dyes is regulated.
CAS Number
84540-50-1
1% line marker
This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.