Manganese sulfate hydrate is weathered in dry air. It starts to decompose at 850 ℃, and can emit sulfur trioxide, sulfur dioxide or oxygen due to different degrees of heating. Soluble in water. The market price of electrolytic manganese in China is rising; With the widespread use of manganese fertilizer in China, the demand for manganese sulfate in paint, catalyst, ceramics, paper making, printing and dyeing industries has increased.