Manganese Carbonate(MnCO3)

   Test                              Specification

Assay(as Mn)                   44.0%minimum

Insoluble in HCI               0.05% maximum

Sulfate(SO4)                   0.5% maximum

Aluminum(Al)                   0.0030% maximum

Calcium(Cl)                    0.0050% maximum

Copper(Cu)                     0.0020% maximum

Iron(Fe)                       0.0035% maximum

Lead(Pb)                       0.0020% maximum

Magnesium(Mg)                  0.010% maximum

Potassium(K)                   0.0050% maximum

Sodium(Na)                     0.0100% maximum

Bulk density (tapped),g/cc(by

ASTM B 527 70)                 0.7-0.7typical

Average particle diameter,in

microns (by sedigraph)         1.0-3.0 typical

+325 Mesh (by ASTM 371 77 )    0.1%

packing: net weight 25kgs,50kgs per each plastic woven bag,or 1000kgs per each package.