ItemIIINa2SO3%90 Min.92.0 Min.Fe %0.02 Max.0.02 Max.Water insoluble material %0.05 Max.0.05 Max.Free alkali(by sodium carbonate) %0.8 Max.0.80 Max.Broad World, Global ReputationMudanjiang Fengda Chemicals Corporation was founded in 1995,it is a specialized manufacturing and operating chemical enter......

| Item | I | II |
| Na2SO3% | 90 Min. | 92.0 Min. |
| Fe % | 0.02 Max. | 0.02 Max. |
| Water insoluble material % | 0.05 Max. | 0.05 Max. |
| Free alkali (by sodium carbonate) % | 0.8 Max. | 0.80 Max. |




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