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4-AMINO-2-NITRODIPHENYLAMINE-2'-CARBOXYLIC ACID

Description

4-Amino-2-nitrodiphenylamine-2'-carboxylic acid is a synthetic compound primarily used in hair dye formulations. This molecule belongs to the family of aromatic amines and is known for its ability to impart vibrant, long-lasting color to hair fibers. Its chemical structure allows for effective penetration into the hair shaft, where it undergoes oxidative reactions to form larger, colored molecules.

This ingredient is particularly valued for its contribution to creating rich, dark shades, especially in the brown to black range. It offers excellent color stability and resistance to fading, even with frequent washing. The presence of the carboxylic acid group enhances its solubility in aqueous solutions, facilitating its incorporation into various hair dye formulations.

While effective as a colorant, 4-amino-2-nitrodiphenylamine-2'-carboxylic acid requires careful handling and formulation due to its potential for skin sensitization. It is typically used in combination with other dye precursors and coupling agents to achieve desired color outcomes. Proper pH adjustment and the inclusion of antioxidants in formulations containing this ingredient are crucial to optimize its performance and minimize potential adverse reactions.