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Direct Black Db

Direct Black DB / CAS : 6369-65-9

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. UN 0.0
HS 32041590 DG Class 0.0
Synonyms Indanthrene Black Bbn; Indanthrene Black; Threne Black Bb; C.I.Vatgreen9; C.I.Vatgreen9(59850); Caledonblackcnb; Indanthrenblackbb-N; Nihon-Threneblackbb
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Properties

Summary

Formula
C34H15NO4
Molecular Mass
501.48700
Exact Mass
501.10000
PSA
79.96000
Logp
8.59140

Attribute classification

Matter Classification
organic
Category
Dyestuffs and Pigments > Direct Dyes
Dyestuffs and Pigments > Vat Dyes

Chemical and Physical Properties

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.

Export information

HS Code
32041590
Export Rebate
0%
UN No.
0.0
DG-Class
0.0

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