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By certification 
Molecular Formula:FeSO4•5H2O
Property:It is gray or light green particle. The relative density is (114°C)1.89,Under 73°C it can change to white. And under 90°C, it can lose 4 crystal waters,and under 300°C it will lose all the crystal waters. In wet environment it can turn into yellow or brown. It can be water and glycerol soluble,and alcohol insoluble.
Quality standard:Ferrous sulfate pentahydrate content =98.5%,Iron content=19.8%
Use:It can be used for the industrial production of iron salts and ink, iron oxide , indigo and carbon monoxide shift catalyst ,and it can still be used as the disinfectant , purificant , tanning agent, and preservatives,and in agriculture, it can be used as the iron fertilizer and the additive of iron element of feed industry.
