DSD acid 4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid CAS No: 81-11-8 EINECS No: 201-325-2 we are manufacturer DSD ACID 1,Chemical name :4,4'– ... Diaminostilbene–2,2'Disulfonic acid2,Commodity name : DSD ACID3,Structural Formula : 4,Molecular Formula : C14H14N2O6S25 ... packing : 25kg/450kg/500kg/bag or at customer's option . DSD ACID