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SOLVENT BLACK 5

Description

Solvent Black 5, also known as C.I. 50415, is a synthetic dye primarily used in hair coloring products. This oil-soluble compound belongs to the azo dye family and is characterized by its deep black hue. In haircare formulations, Solvent Black 5 serves as an effective colorant for temporary and semi-permanent hair dyes, offering intense color payoff and coverage.

The dye's molecular structure allows it to penetrate the hair shaft partially, adhering to the cuticle and providing a longer-lasting color effect compared to surface-level colorants. Solvent Black 5 is particularly valued for its ability to blend with other dyes to create custom shades and for its resistance to fading from washing and environmental factors.

When formulating with Solvent Black 5, it's crucial to consider its potential for skin staining and allergic reactions in sensitive individuals. Proper patch testing is recommended before use. The dye's stability in various pH ranges and compatibility with common hair care ingredients make it a versatile option for formulators. However, its use is regulated in some regions, and formulators must adhere to local cosmetic regulations regarding concentration limits and labeling requirements.