Indigo carmine

Indigo carmine (CAS 860-22-0), also known by its food additive designation E132, is a blue synthetic dye derived from indigo. Sodium indigotindisulfonate is the recognized chemical name buyers encounter in pharmaceutical and regulatory documentation.

It functions as a colorant across food, pharmaceutical, cosmetic, and industrial applications. In food manufacturing, E132 produces blue and green shades in confectionery, beverages, and dairy products, often in combination with yellow dyes.

Pharmaceutical manufacturers use it as a tablet coating colorant and as a diagnostic agent in urological procedures, where it is supplied to strict purity standards. In personal care, it colors products such as bath preparations and hair rinses.

Textile and paper processors use it as a direct dye for cellulosic substrates, delivering characteristic blue tones in dyebath applications. Indigo carmine is supplied as a dark blue powder or granule for various industrial uses.

Standard grades include FCC and food-grade for use in food and beverage applications, USP/BP for pharmaceutical supply chains, and technical grade for textile and industrial use.

Purity specifications and dye content requirements vary by grade, so buyers should confirm compliance documentation against their target application. We ensure all batches meet the rigorous demands of global regulatory frameworks.