Carmoisine

Carmoisine (CAS 3567-69-9) is a synthetic azo dye also known as Azorubin, CI 14720, Food Red 5, and Red 14. It carries the EC number 222-657-4 and the molecular formula C20H14N2O7S2.2Na. Approved under various regional food and textile regulations, it is recognised by its characteristic deep red hue in solution.

In food and beverage manufacturing, carmoisine imparts stable red coloration to products such as confectionery, soft drinks, and jams by forming ionic bonds with substrate matrices that resist pH-induced fading. In textile and leather processing, it functions as a direct dye, adsorbing onto fibre surfaces to achieve uniform red shades with controlled wash fastness.

Carmoisine is supplied as a water-soluble sodium salt powder, classified under HS code 2942.00.5000 and subject to REACH registration requirements for EU commerce. Grades are available conforming to food-additive specifications applicable in permitted markets, with standard packaging in fibre drums or multi-wall bags.