Chemical Name: 1-Diazo-2-Naphthol-4-Sulphonic acid; DIAZO 1, 2, 4 ACID
CAS RN: 887-76-3
Formula: C10H6N2O4S
M．W．:250.23
HS code:
Structure:
Properties: Yellow needle crystal or paste, micro-insoluble in water, soluble in alkali. The melting point of sodium is 168 ℃. Flammable, heated to around 100 ℃ ,it is possible to explode.
Quality Indicators:
Index
|
Common specification |
Appearance |
Yellow to light brown moist material |
Purity %min. |
75 |
Content by HPLC %min. |
95 |
Insoluble substance %max. |
0.1 |
Free acid (H2SO4) %max. |
2 |
Fe mg/kg max. |
30 |
Uses: It is an important component in azo dyes for
A)After chroming, Mordant black-3, Mordant black-17, Mordant red-7
B)Pre-formed 1:1 metal complex dyes like Acid blue 155,Acid blue 158, Acid blue 158:1, Acid blue 161, Acid red 186, Acid red 201
C)Pre-formed 2:1 metal complex dyes like Acid blue 193, Acid violet 90, Acid violet 92
Package: In woven bags with poly liner.Net weight: 30kg/bag. |
