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Direct Blue 6
Direct Blue 6
/ CAS : 2602-46-2| Appearance | Dark blue powder, soluble in water, blue to navy blue solution, slightly soluble in ethanol and fibrinolysin, insoluble in other organic solvents. It is brilliant blue in case of concentrated sulfuric acid and purple to red blue after dilution. Adding concentrated hydrochloric acid to its aqueous solution to form navy blue precipitate; Add sodium hydroxide solution to form dark purple precipitation. When dyeing cellulose fiber, the dye absorption is good. When the temperature is 60-80 ℃, the affinity is the largest and the discharge is good. | Formula | C32H20N6Na4O14S4 | Molecular Mass | 932.75200 |
| HS | 32041100 | UN | 0 | DG Class | 0 |
| Synonyms | Direct Blue; C.I. Direct Blue 6, Tetrasodium Salt; Diaminreinblau; Modrprima15; Benzo Blue 2B; Essex Direct Blue 2 B Conc; Tetrasodium 5,5'-(1,1'-Biphenyl-4,4'-Diylbisazo)-Bis-7-Amino-6-Hydroxy-Naphthalene-1,4-Disulphonate; Direct Blue 6 (C.I. 22610); Nippon Blue B; Light Blue; Direct Sky Blue 5B; Paperblues; Directbluehh; Airedaleblued; Skyblue4B; Skyblue5B; Disulfonsaeure,Natriumsalz; Diazoverb.-Tetranatrium-Salz; 5,5'-Diamino-4,4'-Dihydroxy-3,3'-(3,3'-Dimethoxy-Biphenyl-4,4'-Diyl-Bis-Azo)-Bis-Naphthalene-2,7-Disulfonic Acid,Sodium Salt | ||||
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