Nepa fast blue 43153 Chemical formula: c32 h16 n8 cu C. I. No.: 74160 Cas no.: 147-14-8 Physical appearance: blue odourless powder Purity: 97% min. Specific gravity: 1.4 to 1.6 Particle size: 325 mesh Bulk density: 2.70 0.3 ltr/kg Moisture content: less than 0.80% Ph of 5% extract: 6.8 to 7.5 Grit content: less than 0.08% Water soluble: less than 0.70% Texture: very soft Tinting strength: good tintictorial Heat stability: 200c to 280c Oil absorption: 45% max. In 3 ply paper sacks (one ply duly laminated to provide necessary tensile strength) with inner pe liner each carrying 20/25 kg material net.