Direct Black 19

Chemical Structure:

Multiazo

Chemical Formula:

C₃₄H₃₇N₁₃NaO₇S₂

CAS NO.

6428-31-5

Molecular Weight:

839.77

EINECS NO.

229-208-1

C.I.

35255  

Molecular Structure:

Appearance:

Shade:

Strength:

Moisture:

Ash:

Solubility:

Insoluble:

Fineness:

PH value:

Conductance:

Chlorine ion content:

Black uniform powder.

Similar to the standard.

Corresponding to standard 262±3%

≤8.0%

Not available

≥10g/L (90°C)

≤0.5%

≤0.5%

10.0-10.5

209ms/cm

2.54%

Property:

Black-powder. Diluted a red light black precipitation; The concentrated nitric acid which was dark brown.

Application:

For cotton, rayon, silk and wool fabrics blended fabric dyeing and printing. And with the bath can disperse dyeing polyester / rayon blended fabric. Cymbalta major black dye, one can replace the structure with Benzidine direct black BN. In addition to the main stained black, and brown makes up for various depth of brown, a small adjustment for Shade to increase chromatography.