Product Name: Direct Blue 2
C.I. No.: 22590
CAS No.: 2429-73-4
Molecular Formula: C32H21N6Na3O11S3
Molecular Weight: 830.71
Shade: Dark blue
Relative name:Direct Blue BH;Direct Diazo Black BH;Apollo Direct Black BH;Atul Developed Black BT;Bitamine Direct Diazo Black BH;Black BT;Blue BH;Brown M;Concorde Direct Black BH;
Direct Blue 2 Physical Properties and light fastness, solubility.
Direct blue 2 |
|
Light Fastness |
2 |
Persperation Fastness(fading) |
3 |
Persperation Fastness(stain) |
-- |
Soaping(fading) |
2 |
Soaping(stain) |
-- |
Blue gray powder. Soluble in water for deep purple to black, solubility 35 g/l (85 ℃), slightly soluble in ethanol and soluble fiber element. The strong sulfuric acid in blue, diluted red for purple; In nitric acid for brown in the light purple. The dye solution to join strong hydrochloric acid for red light purple; Add thick sodium hydroxide solution for purplish red color. For cellulose fiber dyeing, the dye absorption rate as well, in 60 ~ 80 ℃ temperature when the biggest affinity. Discharge good, after staining with chromogenic diazotization colorimetric method: use Naphthalen-2-ol show color get navy, between 2 amine with benzene show color get black.
Mainly used for cotton, viscose, silk, leather and pulp color.
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.
