Cosmo Speciality Chemicals, a 100% subsidiary of Cosmo Films Ltd., has launched a range of organic complexing agents – Sequest SA and Sequest DM. The agents are effective in hard water and exhibit excellent chelation properties over a wide range of pH. Applicable in pre-treatment, dyeing and printing processes like desizing, bleaching, dyeing and printing, both agents prevent the corrosion of the metal. Sequest SA is a highly effi cient, eco-friendly, high temperature stable sequestering agent for Ca+2, Fe+3 and other heavy metals; while Sequest DM is a high performance demineralising agent to remove heavy metal ions from cotton and process water. The two agents form complexes by reaction of their negatively charged donor groups with polyvalent metal ions like iron present on the greige fabric and in process water.
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