Indigo

Indigo (CAS 482-89-3), also recognized commercially as FD&C Blue No. 2 and sold under the E132 designation as Indigo Carmine, is one of the oldest and most established blue colorants in industrial use.

It delivers a deep, characteristic blue hue across textile, food-contact, and printing applications where consistent color performance and regulatory acceptance are required for global distribution and manufacturing.

In textile manufacturing, indigo is the defining colorant for denim production, applied through vat dyeing processes to achieve the characteristic fading profile demanded by apparel brands and high-end fashion retailers.

Leather and paper producers use it to achieve uniform blue tones in both decorative and functional grades of finished material. In printing and packaging, it functions as a base pigment in ink formulations.

Deep blue shades and batch-to-batch consistency are critical to brand color standards. The water-soluble sulfonated form, Indigo Carmine, is used as a food and pharmaceutical colorant in tablets and capsules.

These ingestible products are manufactured under FD&C and E132 approvals to ensure safety. Indigo is available as a powder and in pre-reduced liquid vat form for direct textile processing and industrial dyeing.

Food and pharmaceutical grades conforming to FD&C, E132, and USP specifications are supplied as fine powder. Technical-grade material is offered for industrial ink and pigment applications across various sectors.