联系人 Mr. Zhang
West Suburb,Jiayuguan City,Gansu China, Jiayuguan, Gansu
| Index Items | Class I | Class II | Class III | |||
| Excellent product | First grade | Qualified product | First grade | Qualified product | ||
| Sodium Sulfide（Na2S）content | *0.*0%min | *0.*0%min | *0.*0%min | *0.*0%min | *0.*0%min | *5.*0%min |
| sodium sulphite（Na2SO3）content | 2.*0%max | |||||
| sodium hyposulfite（Na2S2O3）content | 2.*0%max | |||||
| Iron(Fe) content | 0.**0%max | 0.**0%max | 0.**0%max | 0.**3%max | 0.**5%max | 0.**0%max |
| sodium carbonate（Na2CO3）content | 3.*0%max | 5.*0%max | - | 2.*0%max | 3.*0%max | |
| water insolubilitycontent | 0.*0%max | 0.*0%max | 0.*0%max | 0.*5%max | 0.*0%max | 0.*0%max |
