ETAD updates threshold limits on organic impurities

摘要

The Ecological and Toxicological Association of Dyes and Organic Pigments Manufacturers (ETAD) has updated its recommended limits on organic impurities which might be present in dye formulations used for textiles and consumer goods. The question of the presence of impurities in dyes and their potential impact on the environment is a persistent point of discussion. According to ETAD, several sources may contribute to the presence of impurities, such as impurities in reactants or raw materials; residues of solvents, reactants or reaction by-products; particularly in the case of trace metals, use of metal catalysts or corrosion of manufacturing plant equipment.