CaCO₃ content %

≥ 98

PH value

9.0~10.5

Hcl insolubles %

≤ 0.10

Sedimentation volume ml/g

≥2.6

Volatiles content at 105°C %

≤ 0.4

Fe%

≤ 0.04

Mn%

≤ 0.004

Residue on sieve 125um%

≤ 0.002

Residue on sieve 45um%

≤ 0.02

Whiteness

≤ 95.5

Oil absorption number g/100g

≤ 70

Activation grade %

≥ 90