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Disperse Black 9 is a synthetic dye used in hair coloring products to impart a black or dark shade to the hair. It is part of the chemical reactions that create permanent hair color.
May aggravate
Safety summary
As with many hair dyes, it can cause skin irritation or allergic reactions in sensitive individuals. A patch test is recommended before use.
CAS Number
20721-50-0
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.