sodium sulphide 1) type: flake red, yellow 2) stable quality in purity, color, impurity 3) prompt ... Sodium Sulphidespecifications flake form color: RED, YELLOW FE content: 1500 -5 ppm max FeNa2SWater insolubleNa2CO3Na2SO3Na2S2O3Color5ppmMax60%Min0.02%Max1.70%Max1.80 ... APPLICATIONS:Used as reducing agent or mordant agent in making sulphur dyes, as flotation agent in non-ferrous metallurgical industry, ...