Item

Standard

Assay

99.5%min

Mgso4

48.59%min

Ph

    5.0-9.2

Arsenic

    0.0002%max

Heavy metal as pb

    0.0006%max

Mgo

   16.20%min

Mg           

     9.80%min

Chloride

    0.03%max

Iron

  0.002%max