Manganese Sulfate Monohydrate (MnSO4·H2O) is widely used in agriculture, animal feed, and industrial batteries. For agricultural grade, ensure a Manganese (Mn) content of ≥31.8% and check for solubility, as it must be 100% water-soluble for fertigation. For feed grade, strict control over heavy metals is mandatory; look for Lead (Pb) <10ppm and Arsenic (As) <5ppm. If sourcing for battery grade (high-purity), the purity should exceed 99.9% with extremely low magnetic substance limits to ensure battery safety and cycle life.