sodium sulfite
Product name | Sequence numbers | Testing programmes | Superior | First grade |
sodium sulfite (HG/T2967-2010) | 1 | appearance | white crystalline powder | |
2 | Na2SO3(%) | ≧97 | ≧93.0 | |
3 | Fe(%) | ≦0.003 | ≦0.005 | |
4 | water-insoluble substance(%) | ≦0.02 | ≦0.03 | |
5 | free alkali(%) | ≦0.10 | ≦0.40 | |
6 | sulfates(%) | ≦2.5 | __ | |
7 | chloride(%) | ≦0.10 | __ | |
