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Standard:GB/T 11199-89
Uses:It is widely used in papermaking, textile, light industry, petroleum, plastic, rubber, dye, medicine, metallurgy and war industry.
Technical requirements:
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Top-grade |
First grade |
Qualified product |
| Sodium hydroxide , % ≥ |
32.0 |
32.0 |
32.0 |
| Sodium carbonate , % ≤ |
0.04 |
0.06 |
0.06 |
| Sodium chloride , % ≤ |
0.004 |
0.007 |
0.01 |
| Ferric oxide, % ≤ |
0.0003 |
0.0005 |
0.0005 |
| Sodium chlorate, % ≤ |
0.001 |
0.002 |
0.002 |
| Calcium oxide, % ≤ |
0.0001 |
0.0005 |
0.001 |
| alumina, % ≤ |
0.0004 |
0.0006 |
0.001 |
| silica , % ≤ |
0.0015 |
0.002 |
0.004 |
| Sulfate (as Na2SO4), % ≤ |
0.001 |
0.002 |
0.002 |
* The standard of Top-grade is referenced to Japanese standard(1984) .
Molecular formula:NaOH
Relative molecular mass :40
Properties: colorless transparent liquid, is strong alkali
Packing & Storage: Transport in train or clean tank car, no leakage, Do not mix with inflammable/flammable matter, acid and food chemicals.
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