Product Name: Direct Black 239 C.I. No.: 22580 CAS No.: 3626-23-1 Molecular Formula:C32H22N6Na2O8S2 Molecular Weight: 728.66
Shade: Black.
Direct Direct Black 239 Physical Properties and light fastness, solubility.
Direct Black 239
Dyeing depth %
2
Insolubles %
0.15
Light Fastness
4
Washing Fatness
2
Rubbing fastness(dry)
4
Rubbing fastness(wet)
3
Direct Direct Black 239 Properties: blue ash. Soluble in water (for violet black) and soluble fiber element, slightly soluble in ethanol is shallow purple, insoluble in other organic solvents. The strong sulfuric acid in blue, diluted for purple, have precipitation. The dye solution to join strong hydrochloric acid for dark, precipitation; Add thick sodium hydroxide solution for purplish red color, have precipitation.
