Formula：NAOH
Application：
Caustic Soda is an important element for inorganic materials. Widely used in light industry as well as chemical, textile, medicine, metallurgy and electronic industries.
Main Model：
Diaphragmatic method: 30% alkaline solution, 96% alkaline flake.
Ion-exchange membrane method: 30% alkaline solution, 32% alkaline solution, 50% alkaline solution and 99% alkaline flake.
Sodium Hydroxide Standards：
1. Requirements of industrial solid sodium hydroxide (including alkaline flake)(GB209-93)
| ItemIndex | Diaphragmatic Method |
||
Best |
Fine |
Pass |
|
Sodium Hydroxide%≥ |
96.0 |
96.0 |
95.0 |
Sodium Sulphate%≤ |
1.3 |
1.4 |
1.6 |
Sodium Chloride%≤ |
2.7 |
2.8 |
3.2 |
Iron Oxide%≤ |
0.008 |
0.01 |
0.02 |
Note: Comparative figures are listed in the table above.
2. Requirements of industrial liquefied sodium hydroxide：
| ItemIndex | Diaphragmatic Method |
||||
Model I |
Model II |
||||
Best |
Fine |
Pass |
Fine |
Pass |
|
Sodium Hydroxide%≥ |
42.0 |
42.0 |
42.0 |
30.0 |
30.0 |
Sodium Sulphate%≤ |
0.3 |
0.4 |
0.6 |
0.4 |
0.6 |
Sodium Chloride %≤ |
1.6 |
1.8 |
2.0 |
4.7 |
5.0 |
Iron Oxide %≤ |
0.004 |
0.007 |
0.01 |
0.005 |
0.01 |
Note: Comparative figures are listed in the table above.
3. Requirements of ionized sodium hydroxide: (GB/T11199-89)
|
Level of Products |
Level |
First Grade |
Pass |
Method of Testing |
||
Index |
Model I |
Model I |
Model I |
Model II |
||
Name of Index | ||||||
NaOH≥ |
32.0 |
32.0 |
28.0 |
32.0 |
28.0 |
GB11213-1（A） |
Na2CO3≤ |
0.04 |
0.06 |
0.06 |
0.06 |
0.06 |
GB4348-1（B） |
NaCL≤ |
0.004 |
0.007 |
0.007 |
0.01 |
0.01 |
GB7698 |
Fe2O3≤ |
0.0003 |
0.0005 |
0.0005 |
0.0005 |
0.0005 |
GB11213-2 |
NaCLO3≤ |
0.001 |
0.002 |
0.002 |
0.002 |
0.002 |
GB4348-3 |
CaO≤ |
0.0001 |
0.0005 |
0.0005 |
0.001 |
0.001 |
GB11200-1 |
Al2O3≤ |
0.0004 |
0.0006 |
0.0006 |
0.001 |
0.001 |
GB11200-8 |
SiO2≤ |
0.0015 |
0.002 |
0.002 |
0.004 |
0.004 |
GB11200-2 |
Na2SO4≤ |
0.001 |
0.002 |
0.002 |
0.002 |
0.002 |
GB11213-4 |
