Acid Black 2Name:C.I.Acid Black 2, C.I.50420Molecular Structure: azine classC.I.Acid Black 2, C.I.50420, CAS 1064-48-8, Acid Black 6RB, Acid NigrosineMolecular Formula:Molecular Weight:CAS Registry Number:8005-03-6Manufacturing Methods : will all grades of alcohol solution aniline Black (C.I.Solvent Black 5, C.I. 50415) stlfonation, again into their products for all kinds of sodium salt.Properties and Applications:  black. Black with flash in the granular, a violet is soluble in water, soluble in ethanol is blue. The strong sulfuric acid dyes is blue, it will be diluted and the generated purple precipitation. Blue light purple in aqueous solution, and sodium hydroxide show dark purple precipitation. Mainly used for leather dyeing. Also applies to paper, wood, soap, electrical-controlled aluminum, wool and silk dyeing of content, but also can be used in the manufacture of ink.StandardLight FastnessSoapingPersperation FastnessOxygen bleachingFastness to seawaterFadingStainFadingStainFadingStainISO544