| Use |
Used in papermaking, soap, dyes, rayon, aluminum, petroleum refining, cotton fabric finishing, purification of coal tar products, as well as food processing, wood processing and machinery industry. |
| Index |
①32% sodium hydroxide solution index:
| Item |
Premium |
First grade |
| Content≥% |
32 |
32 |
| Sodium carbonate ≤ |
0.04 |
0.06 |
| Sodium chloride≤ |
0.004 |
0.007 |
| Ferric oxide≤ |
0.0003 |
0.0005 |
| Sodium chlorate≤ |
0.001 |
0.002 |
| Calcium Oxide≤ |
0.0001 |
0.0005 |
| Aluminum Dioxide≤ |
0.0004 |
0.0006 |
| Silica≤ |
0.0015 |
0.003 |
| Sodium sulfate≤ |
0.001 |
0.002 |
②48% sodium hydroxide solution index:
| Item |
Premium |
First grade |
合格品 |
| Content≥% |
48 |
48 |
48 |
| Sodium carbonate≤ |
0.1 |
0.2 |
0.2 |
| Sodium chloride≤ |
0.007 |
0.01 |
0.01 |
| Ferric oxide≤ |
0.0005 |
0.0007 |
0.001 |
| Sodium chlorate≤ |
0.002 |
0.003 |
0.003 |
| Calcium Oxide≤ |
0.0003 |
0.0008 |
0.0008 |
| Aluminum Dioxide≤ |
0.001 |
0.002 |
0.002 |
| Silica≤ |
0.002 |
0.003 |
0.003 |
| Sodium sulfate≤ |
0.002 |
0.003 |
0.003 |
③98% industrial flake sodium hydroxide index:
| Item |
Standard value |
| Appearance |
White flake solid |
| Content≥% |
98.0 |
| Sodium carbonate≤% |
0.8 |
| Sodium chloride≤% |
0.05 |
| Ferric oxide≤% |
0.008 |
④Indices of food additive sodium hydroxide:
| Item |
Standard value |
| Appearance |
White flakes, allowing micro-strip color |
| Total alkali |
98.0-100 |
| Sodium carbonate≤% |
2.0 |
| Arsenic，≤% |
3.0 |
| Heavy metal，≤% |
5 |
| Hg，≤ |
0.1 |
| Insoluble matter and organic impurities |
Pass the test |
|
