Purity: ≥ 89%-93%

CaO: ≤ 0.3%

Fe: ≤ 0.1%

SiO2≤ 0.25%

Seive Residue≤ 0.02

Cl-≤ 0.15%

Ignition loss≤ 8%

I2 Obserption value≥ 130mg/g

Bulk density≤ 0.2g/ml

Whitenes≥ 93%