Direct Black 78
Name:C.I.Direct Black 78,C.I.30015
Molecular Structure: Double azo class
C.I.Direct Black 78,C.I.30015,CAS 8003-79-0,755.69,C32H23N9Na2O7S2
Molecular Formula:C32H23N9Na2O7S2
Molecular Weight: 755.69
CAS Registry Number:8003-79-0
Manufacturing Methods : 4-Nitrobenzenamine diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid matches, will the nitro reduction for amino, again diazo, and 4-Nitrobenzenamine diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid coupled to product matches, then will the nitro reduction.
Properties and Applications: green and black. Soluble in water, slightly soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for blue to blue-ray black, diluted for purple, have precipitation; In the light of nitric acid solution for dark brown. The dye solution for blue-ray black, add thick sodium hydroxide solution to blue.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3 | 3 | 5 | 2 | 2 | ||
| AATCC | 1 | 3 | 3 | 4 | 4 | ||
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