... granular or crystalline powder Uses:Leather, chrome tanning.Refind Sodium Formate 90%,92%,94%,95%,97% Properties:White ... ; Printing and dyeing industry, reducing agent..For the production of sodium hydrosulfite, oxalic acid and formic acid .ItemsIndexContent ,% ≥90929597Sodium hydroxide ,% ... 005Fe3+≤20PPm≤30PPm*PH9---139---13Note:“*”mark means it is only for reference only Packing: 25kg/40kg/50kg ...