... ,Insoluble in water. DSD ACID1,Chemical name : 4,4'–Diaminostilbene–2,2'–Disulfonic acid2,Commodity name : DSD ACID3,Structural Formula: 4,Molecular Formula ... oxidized red in air .There is similar properties with aromatic acid and amine .7,Specifications : ItemMoist productsDry productsAppearanceLight yellow pasteLight yellow ... : 25kg/450kg/500kg/bag or at customer's option . DSD Acid