CaCO₃ content %

≥ 98

PH value

9.0~10.5

Volatiles content at 105°C %

≤ 0.5

Hcl insolubles %

≤ 0.10

Sedimentation volume ml/g

≥ 2.6

Fe%

≤ 0.05

Mn%

≤ 0.005

Residue on sieve 36um%

≤ 0.001

Whiteness

≥ 95

Water solubles

≤ 0.2