CAS: 1326-83-6 Colour Index No.: C.I. Solubilised Sulphur Black 1( 53186) Standard of identity: HG/ T3632-1999 Appearance Black Uniform Granules or powder Spectrometer strength 100± 5 Strength( with the standard ) 100% Shade Approximate to the Standard Moisture, %      d 7.0 Insoluble Impurity in Water, % d 0.5 Solubility, G/ L( 60 )  e 60 Packing: In 25 kgs net woven bag / carton / iron drum.