... DSD ACID Chemical name : 4,4'aaDiaminostilbeneaa2,2'aaDisulfonic acid Dyes intermediates Purity :above 95 % 1,Chemical name : 4,4 ... customer's specifications.8,Uses:Dyes intermediates to produce Fluorescent whitener , paper ,direct dyes.Reative dyes and used as insecticide ect .9 ... ,Packing : 25kg/450kg/500kg/bag or at customer's option . DSD Acid / Dyes ...