Other Name: C.I. 37520; Naphthol AS-D (VAN); C.I. Azoic Coupling Component 18; 3-Hydroxy-2`-methyl-2-naphthanilide;Naphthanil AS-D
CAS No: 135-61-5
Molecular Formula: C18H15O2N
Molecular Weight: 277.34
Physical and chemical properties:
Cream-colored yellow uniform powder, initial melting point of dry product 193 . Insoluble in water. It is yellow transparent solution when soluble in sodium hydroxide. It can couple with diazoic salt of aromatic amine series ot produce insoluble azoic dyes.
Specifications:
|
Grade A |
Grade B |
|
|
Appearance |
Light yellow powder |
|
|
Shade |
Similar(comparison with the standard) |
Similar(comparison with the standard) |
|
Strenght |
100 |
100 |
|
Contact |
98.5% |
96.5% |
|
I.M.P of dry product |
193 |
190 |
|
Insolubles in alkali solution |
0.2% |
0.4% |
|
Content of Bon acid |
0.1% |
|
|
Fineness(resdiue on |
5% |
|
Application:
For manufacturing azo dyes, dyeing and printing cotton fibre, viscose fibre and synthetic fibre. Packing: Woven bag, paper bag, polywood drum and iron drum all lined with plastic bag, net weight 25Kg.