China (Mainland) Magnesium Sulfate Fertilizer

Specifications: Appearance white powder or flowing Mgso4 60%-82% Mgo 17%-27% Ph(5w/v%sol) 5-6.5 Ferron(fe) 0.002% max Chlorid(cl) 0.005% max Heavy metal (pb) 0.001 %max Arsenic(as) 0.0002% max Water insoluble 5%-22% Size (mm) 60mesh or 2-4mm