English name: Fast Black K Salt; Fast Black K Salt hemi (zinc chloride) salt; Azoic Diazo No. 38; 2,5-Dimethoxy-4- (4-nitrophenylazo) benzenediazonium chloride zinc double salt; 4-Amino-2, 5-dimethoxy-4′-nitroazobenzene diazotated zinc double salt
Other names: solid black K; solid black K semi-zinc chloride salt
CAS number: 64071-86-9
C14H12N5O4 • 1 / 2ZnCl4 = 417.88
Level: Practical grade
Dye content: ~ 30%
Solubility: Dark red or red brown solution at 10mg / ml of water
Carbon: 10.0 ～ 14.1%
Nitrogen: 4.1 ～ 5.9%
Properties: date red or brown powder, easily soluble in water, melting point 150 ℃ (decomposition). λmax 457 nm
Uses: biochemical research. Stain preservation: RT
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