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This ingredient is a synthetic colorant used in hair dye formulations. It imparts a blue shade to hair, either as a standalone color or as part of a blend to create other hues.
May aggravate
Safety summary
As with all hair dyes, there is a potential for skin irritation or allergic reactions, especially in sensitive individuals. A patch test is always recommended before use.
CAS Number
2390-60-5
For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.