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Direct Black DB

CAS NO.： 6369-65-9

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Specification： 98%

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Lead Time： 14-30 days

Max Capacity： -

Packing： 25KG/Fibre Drum

Product Detail

Properties

Direct Black DB

English Name: Direct Black DB

CAS No.: 6369-65-9

Molecular formula: C34H15NO4

Molecular weight: 501.49

EINECS No.: 228-873-5

Usage: Direct Black DB is mainly used for dyeing cotton fiber. After dyeing, it is treated with oxidant (such as sodium hypochlorite or sodium nitrite and concentrated sulfuric acid), the color changes from dark green to dark black, the color light is stable, and the levelness and affinity are very good. It is also used for dyeing viscose fiber, silk, wool, vinylon and vinylon cotton blended fabrics. Direct black DB is also effective in dyeing silk, with good freshness and levelness. When dyeing viscose fiber, the color is light, and the color light is slightly dark at high temperature. Vinylon can also be dyed, but the color is red and purple. Dyed cotton and Uygur blended fabrics also have a red color. The dye of this product has no change in color light after finishing with urea formaldehyde and other resins.

Properties

Reduced black BBN is mainly used for the dyeing of cotton fiber. After dyeing, it is treated with oxidants (such as sodium hypochlorite or sodium nitrite and concentrated sulfuric acid), the color changes from dark green to dark black, the color light is stable, and the levelness and affinity are very good. It is also used for dyeing viscose fiber, silk, wool, vinylon and vinylon cotton blended fabrics. Reduced black BBN is also effective in dyeing silk, with good freshness and levelness. When dyeing viscose fiber, the color is light, and the color light is slightly dark at high temperature. Vinylon can also be dyed, but the color is red and purple. Dyed cotton and Uygur blended fabrics also have a red color. The dye of this product has no change in color light after finishing with urea formaldehyde and other resins.

CAS No.

6369-65-9

Formula

C34H15NO4

Molecular Mass

501.48700

Exact Mass

501.10000

PSA

79.96000

Logp

8.59140

Matter Classification

organic

Category

Density

1.653 g/cm3

Appearance

Black powder, insoluble in water and ethanol, slightly soluble in acetone, chloroform, pyridine and toluene, soluble in o-chlorophenol, xylene and tetrahydronaphthalene. It is dark purple in concentrated sulfuric acid and precipitates into dark purple after dilution. The leucosomes in alkaline sodium silicate reducing solution are purple and dark red in acid solution. It was originally green and became black after oxidation. At present, they are used as black vat dyes. It belongs to anthrone anthraquinone vat dyes.

HS Code

32041590

UN No.

0.0

DG-Class

0.0

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