 |
Disperse Dyestuff | |
Reactive Dyestuff | |
Direct Dyestuff |
|
Intermediate | |
Indigo | |
H-acid |
|
Sulfuric acid | |
H acid monosodium salt (1-Amino-8-hydroxy-3,6-naphthalenedisulfonic acid monosodium salt)
|
Specification of quality |
Paste cake |
powder |
H-acid mono sodium salt% % |
42±2.0 |
≥85.0 |
H-acid mono sodium salt%(HPLC) ≤ |
97.0 |
97.0 |
chromotropic acid disodium salt %≤ |
1.5 |
1.5 |
T-acid disodium salt %≤ |
0.5 |
0.5 |
ω-acid disodium salt %≤ |
0.5 |
0.5 |
Moisture %≤ |
--- |
5.0 |
Insoluble %≤ |
0.2 |
0.2 |