Physico-Chemical Compositions		Special Grade	The First Grade	The Second Grade	The Third Grade
Silicon Dioxide% >		60	59	58	55
Magnesia % >		30	30	28	26
Calcium Oxide%  <		0.8	1.2	1.5	2.0
Moisture% <		0.5	0.5	0.5	0.5
Loss On Ignition% <		5.0	5.0	5.0	5.0
Whiteness% >		90	86	83	80
Fineness	325Mesh (45um) passing % >	98	96	96	96
	Remain % <	2	4	4	4

Use: papermaking, cable, rubber, pottery and porcelain, paint, waterproof materials, etc.

Packing: Compound bags and paper bags(or negotiated by two parties) of 25Kgs or 50Kgs. net each.

Note: This is only reference, the concrete standard shall decided by the supply and requisitioning parties.