• Direct Dyes Direct Blue 2
  • Direct Dyes Direct Blue 2
  • Direct Dyes Direct Blue 2
  • Direct Dyes Direct Blue 2
  • Direct Dyes Direct Blue 2

Direct Dyes Direct Blue 2

Colour: Blue
Appearance: Powder
Usage: Paper, Ink, Leather, Textile, Food, Plastic, Paint
Application Material: Wool
Name: Direct Blue 2
Content: 100%
Customization:
Diamond Member Since 2013

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Basic Info.

Model NO.
22590
C.I.No.
Direct Blue 2
Related Name
Direct Black SD
Light Fastness
2
Washing Fatness
3
Rubbing Fastness
4
Transport Package
Bag
Trademark
emperor
Origin
China
HS Code
3204140000
Production Capacity
80000t/Y

Product Description

Direct Dyes Direct Blue 2

C.I.Direct Blue 2,
C.I.22590,
CAS 2429-73-4,830.71,C32H21N6Na3O11S3,Direct Blue BH,Direct Diazo BlackBH

Molecular Formula:C32H21N6Na3O11S3

Molecular Weight: 830.71

CAS Registry Number:2429-73-4

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in alkaline conditions respectively with the 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: dark blue. Blue gray powder. Soluble in water for deep purple to black, solubility 35 g/L (85 ºC), 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 ºC 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.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4 2 2   2  
AATCC 3 3 3 3   3  

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Direct Dyes Direct Blue 2



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Direct Dyes Direct Blue 2
Direct Dyes Direct Blue 2
Direct Dyes Direct Blue 2
Direct Dyes Direct Blue 2

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