Acid green 50

Acid Green 50, also known as Green S and listed under C.I. 44090, is a synthetic triarylmethane dye registered under CAS 3087-16-9 and EC 221-409-2. It carries no E-number designation for food use in the EU and is classified under HS code 32041200 for customs purposes.

In textile and leather processing, Acid Green 50 bonds to protein and polyamide fibres through ionic interaction with amino groups, producing stable green coloration under acidic dyebath conditions. In printing and packaging applications, it functions as a surface-active colorant, contributing to ink adhesion and substrate wetting on coated papers and films.

Acid Green 50 is supplied as a powder and is subject to REACH registration requirements for EU market entry. Buyers should confirm grade specification and purity documentation prior to procurement, particularly for applications in regulated sectors such as food contact materials or leather goods destined for consumer markets.