CaCO₃ content %

≥ 98

PH value

9.0~10.5

Hcl insolubles %

≤ 0.10

Sedimentation volume ml/g

≥2.5

Fe%

≤ 0.05

Mn%

≤ 0.005

Oil absorption number g/100g

≤ 65

Activation grade %

≥ 96

Residue on sieve 400 mesh sieve%

≤ 0.001

Volatiles content at 105°C %

≤ 0.30

Whiteness

≥ 95