Name:C.I.Acid Black 2,C.I.50420 Molecular Structure: azine class C.I.Acid Black 2,C.I.50420,CAS 1064-48-8,Acid Black 6RB,Acid Nigrosine Molecular Formula: Molecular Weight: CAS Registry Number:8005-03-6 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. Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater Fading Stain Fading Stain Fading Stain ISO 5 4 4 2.International Similar Brand Acid Black 6RB AACL Nigrosine WB ABCOL Nigrosine 02P Acid Black Acid Black No 2 Acid Black WR Acid Nigrosine Acid Nigrosine 02P Cryst Acid Nigrosine Black ADC Nigrosine Black-B [UJ Akacid Nigrosine WB Cryst Akacid Nigrosine WB Pdr/Cryst Classic Acid Black 2 Crystals