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C.I.NO: Solvent Black 5

Alias: C.I. 50415; C.I. Solvent Black 5; Solvent Black 5; Nigrosine, alcohol soluble; Nigrosin,alcohol soluble; Solvent Black 5; Spirit Nigrosine; Oil Black; Solvent Black 7 (50414:1); Nigrosin alcohol soluble; Alcohol soluble nigrosine.

Physical and chemical properties: Appearance is a black uniform powder. It is insoluble in water, soluble in ethanol, pure benzene and toluene, and easily soluble in oleic acid and stearic acid. It has good heat resistance, blue-black in ethanol, blue to blue-black in concentrated sulfuric acid solution, and blue-black precipitation after dilution. After adding sodium hydroxide to its aqueous solution, it showed a brownish purple precipitate.

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Uses: Mainly used for the coloring of plastics, adhesive tape powder, bakelite powder, shoe polish, printing ink and ink.