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4-HYDROXYPROPYLAMINO-3-NITROPHENOL

Description

4-Hydroxypropylamino-3-nitrophenol is a synthetic hair dye ingredient primarily used in semi-permanent and demi-permanent hair coloring products. This compound belongs to the nitrophenol family and is known for its ability to impart red to violet shades to hair. Its molecular structure allows it to penetrate the hair shaft and interact with the melanin pigments, resulting in long-lasting color.

This ingredient is typically used in concentrations ranging from 0.5% to 3% in hair dye formulations. It works synergistically with other dye molecules to achieve desired color outcomes. 4-Hydroxypropylamino-3-nitrophenol is particularly effective in creating vibrant red and burgundy hues, making it a popular choice for fashion-forward hair colors.

Safety assessments have shown that this compound is generally well-tolerated when used as directed in hair dye products. However, as with many hair dye ingredients, it may cause skin sensitization in some individuals. Patch testing is recommended before use to minimize the risk of allergic reactions. This ingredient is regulated by cosmetic authorities in various countries to ensure its safe use in hair coloring products.