Items		Specified
MgO≥		99
Acid-insoluble substance≤		0.02
loss on ignition≤		2.0
Chloride≤		0.1
Sulphate≤		0.05
Fe≤		0.002
325mesh Screen Residues through325mesh≤		0.03
Accumulation density	Light≤g/ml	0.45
Heavy≥g/ml	0.6
Mn≤		0.003
Ca≤		0.05
Soluble Substances ≤		0.3
Ba≤		0.003