Direct Dyes Black 239 for Paper Dyeing

Product Description

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.

Note: The data contained here are based on our current knowledge and experience. It is the responsibility of user to test our products before the final application.
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