Appearance white crystal
Main content 99.5% min
Mgso4 48.6% min
Mgo 16.3% min
Mg 9.8% min
Ph(5w/v%sol) 4-6.5
Ferron(fe) 0.0015% max
Chlorid(cl) 0.005% max
Heavy metal(pb)0.001 %max
Arsenic(as) 0.0002% max
Insoluble 0.0010% max
Size(mm)0.1-1