Acid Black 2 Nigrosine Black Crystal for Leather

Product Name: Acid Black 2, Nigrosine Black Crystal
C.I. No.: 50420
CAS No.: 8005-03-6
Molecular Formula: C22H14N6O9S2-3.2[NA]
Molecular Weight: 616.49Shade:BlackRelative name: Acid Black No 2;Acid Black WR;Acid Nigrosine;Acid Nigrosine 02P Cryst;Acid Nigrosine Black;ADC Nigrosine Black-B;Akacid Nigrosine WB Cryst;Akacid Nigrosine WB Pdr/Cryst;Classic Acid Black ;ConacidBlacB;Cylcotone Black WSY Liq;Dayglo Add Black 2 ;Dinacid Nigrosine WS;Dyacid Nigrosine NBS Xtals;Dycosacid Nigrosine NBL;Elgacid Nigrosine WS [B] ;Haricid Nigrosine Black;Leadacid Nigrosine WS Pdr/CrystLiq;Lecotan Black[DP];
Acid Black 2Standard
FiberSoapingPersperation FastnessOxygen bleachingLight
FastnessFadingStainISOWool4--5
Properties: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.Applications:
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.