... color sensitive materials developing and processing, and applied as dyeing trilon b is used as bleaching fixer for the color sensitive materials ... , synthetic rubber, polymerization initiator and heavy metal quantitative analytical reagent.CAS NO 60-00-4 .Specification ItemSpecificationEDTA99.0%minChloride(Cl)0 ... (Fe)0.001%maxHeavy Metal (Pb)0.001%maxAppearanceWhite powder trilon B