Substances

Index

First-class

CaCO₃ (as dry basis)

97% Min

PH (10% solution)

9.0-10.5

105 ºC  volatile

0.7% Max

Insoluble matter in HCl

0.2% Max

Sedimentation volume

2.6 mL/g Min

Fe

0.1% Max

Mn

0.008% Max

Whiteness

90 Min

Screening

Remainder

125 µm sieve

0.01%

45 µm sieve

0.4%