Carbon Black.
Calcium Carbonate.
Lithium carbonate.
Solubility in Carbon Disulphide (CS2), % by wt, Min 99.9 (on dry basis) IS: 6655 99.9 2 Acidity (as H2SO4), % by wt., Max 0.03 IS: 6655 0.002 3 H2S content, ppm wt, Max 300 - 100 4 Colour in Solid State at ambient temperature, Visual Bright Whitish Yellow Visual Bright Yellow 5 Ash, % by wt., Max 0.25 IS: 6655
