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HC YELLOW NO. 7

Description

HC Yellow No. 7, also known as 2-[(2-Hydroxyethyl)amino]-4,6-dinitrophenol, is a semi-permanent hair dye ingredient widely used in the cosmetic industry. This synthetic colorant imparts a vibrant yellow hue to hair products and is particularly effective in creating warm blonde and golden tones. HC Yellow No. 7 belongs to the class of nitro dyes, which are known for their ability to penetrate the hair shaft and provide longer-lasting color results compared to temporary dyes.

The molecule's structure allows it to bond with hair proteins, ensuring color retention through multiple washes. It is often used in combination with other dyes to achieve a wide range of hair colors and shades. HC Yellow No. 7 is approved for use in hair dye formulations in many countries, including the European Union, where it is subject to concentration restrictions to ensure safety.

While effective as a colorant, it's important to note that some individuals may experience skin sensitization or allergic reactions to HC Yellow No. 7. As with all hair dyes, a patch test is recommended before use to check for potential adverse reactions. Proper formulation and application techniques can help minimize the risk of skin irritation and maximize color performance.