Vat Black 25

CAS：4395-53-3

Molecular formula：C₄₅H₂₂N₂O₆

Molecular weight：686.6

Appearance：VAT black 25 is mainly used for dyeing cotton fibers. It has medium levelness and good affinity. It is generally used for dyeing dark gray and variegated colors. It is also used for dyeing silk, wool and polyester cotton fabrics.

Synopsis: Tan powder. It is green in concentrated sulfuric acid and produces black precipitation after dilution. It is reddish brown in concentrated nitric acid. It is gray in the alkaline solution of insurance powder and dark olive in the acidic solution.

Structural formula： 结构式

Properties

VAT black 25 is mainly used for dyeing cotton fibers. It has medium levelness and good affinity. It is generally used for dyeing dark gray and variegated colors. It is also used for dyeing silk, wool and polyester cotton fabrics.

CAS No.

4395-53-3

Formula

C45H22N2O6

Molecular Mass

686.66600

Exact Mass

686.14800

PSA

130.24000

Logp

8.09390

Matter Classification

organic

Category

Density

1.527g/cm3

Appearance

Tan powder. It is green in concentrated sulfuric acid and produces black precipitation after dilution. It is reddish brown in concentrated nitric acid. It is gray in the alkaline solution of insurance powder and dark olive in the acidic solution.

HS Code

0.0

UN No.

0.0

DG-Class

0.0

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