Back to Ingredient Dictionary

ACID RED 51

Description

Acid Red 51, also known as Fast Red E, is a synthetic azo dye widely used in the cosmetic and personal care industry. This water-soluble colorant imparts a vibrant red hue to various skincare and makeup products, including lipsticks, blushes, and hair dyes. Its molecular structure allows for excellent color stability across a range of pH levels, making it versatile for different formulations.

In skincare applications, Acid Red 51 is primarily utilized for its coloring properties rather than any specific skin benefits. It is approved by regulatory bodies such as the FDA and EU for use in cosmetics, with established concentration limits to ensure safety. The ingredient undergoes rigorous testing for purity and potential contaminants before incorporation into products.

While generally well-tolerated, some individuals may experience sensitivity to this dye. Patch testing is recommended for those with known allergies to synthetic colorants. Formulators often combine Acid Red 51 with other pigments to achieve desired color outcomes in cosmetic products. Its performance in terms of color payoff, uniformity, and longevity makes it a preferred choice for many manufacturers seeking to create visually appealing and long-lasting cosmetic formulations.