Acid Blue 3

Acid Blue 3 (CAS 3536-49-0), commercially recognized as Patent Blue V and approved as E131, is a synthetic triarylmethane dye used to impart vivid blue coloration across food, cosmetic, and industrial applications.

Regulatory approval in multiple jurisdictions makes it a primary consideration for formulators requiring a certified blue colorant. In food and beverage production, it is used to color confectionery, soft drinks, and ice cream.

This dye is preferred where a bright, stable blue shade is required. Cosmetic and personal care manufacturers incorporate it into rinse-off products such as shampoos, bath products, and toothpaste to achieve consistent blue tones.

In printing and packaging, it functions as a dye component in water-based inks where color intensity and substrate adhesion are critical to print quality. Textile and leather processors use it in aqueous dyebaths.

The product is used to dye protein-based fibers and finished leather goods. It is supplied as a powder or granule, with liquid concentrations available for direct dosing in various industrial processes.

Food and cosmetic grades conforming to E131 specifications are the most commonly sourced, with purity requirements aligned to regional regulatory standards including EU and Codex Alimentarius frameworks.

Technical grade material is available for non-consumable applications such as textile dyeing and ink formulation. This ensures versatility for manufacturers across different sectors requiring high-performance colorants.