CaCO₃ content %

≥ 98

PH value

9.0~10.5

Volatiles content at 105°C %

≤ 0.5

Hcl insolubles %

≤ 0.1

Sedimentation volume ml/g

≥ 2.5

Fe%

≤ 0.05

Mn%

≤ 0.005

Residue on sieve 125um%

≤ 0.005

Residue on sieve 45um%

≤ 0.02

Whiteness

≥ 96