Cas No.:1326-83-6 Type: sulphur dye BR100% Molecular Formula: C6H4N2O5 25kg bag/carton,iron drum Product DescriptionCAS: 1326-83-6 Colour Index No.:C.I. Solubilised Sulphur Black 1(53186)Standard of identity:HG/T3632-1999AppearanceBlack Uniform Granules or powderSpectrometer strength100±5Strength(with the standard )100%ShadeApproximate to the StandardMoisture,% ≤7.0Insoluble Impurity in Water, % ...