ISO9000 best price,quality and service 4,4-Diaminostilbene-2,2-disulfonic acid / DSD acidMolecular formula: C14H14N2O6S2Molecular weight: 370.4 Property: 1)Light ... easily oxidized into red; has the property of aromatic acid or aromatic amine Specification ItemIndex(1)Appearance dry/wetlight yellow ... product: in 40kg woven bag or upon clients' request. DSD acid /4,4-Diaminostilbene-2,2-disulfonic acid