English Name: Direct Black 38; Chlorazol Black E； Disodium 4-amino-3-[[4'-[(2,4-diaminophenyl)azo][1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate

Other names: Direct Black ex; Direct qingguangyuan; Direct element; Direct Yuanqing; Clozazole black; Carazole black E; Acid green light direct black; Direct Black 38

CAS No.: 1937-37-7

C34H25N9Na2O7S2=781.73

Grade: BS

Physicochemical Properties (the following information is for reference only): dark brown or black powder, green and black, with a solubility of 40g / L (85 ° C). Slightly soluble in ethanol, green blue black, soluble in fibrinolysin, insoluble in other organic solvents. In case of concentrated sulfuric acid, it is dark red and blue, and after dilution, it is purple and brown to red and black; Yellow brown solution in concentrated sulfuric acid; It is dark red and black precipitated in concentrated hydrochloric acid. The dye aqueous solution is added with concentrated hydrochloric acid to precipitate in a purple brown color; Adding concentrated sodium hydroxide solution will produce blue gray precipitate.

Usage: This product is only for scientific research, not for other purposes

Saving: RT