ITEM

Precipitated

Natural

BasO4 Purity (by dry basis)

98 % Min.

97 % Min.

Whitness

96 % Min.

96 % Min.

Volatility at 105 degree

0.2% Max.

0.3% Max.

pH value

6.5 - 9

6.5 - 9.5

HCL Insoluble Matter

98 % Min.

97 % Min.

Water soluble matter

0.2 % Max.

0.2 % Max.

Loss On Ignition

< 1 %

< 1 %

Iron (on Fe basis)

0.01 % Max.

< 0.3 %

Moisture

0.15 % Max.

< 0.5 %

325 Mesh residue (45 m)

0.01 % Max.

0.05 % Max.

Particle Size Distribution

< 5 m

100 % Min.

100%

< 3 m

60 % Min.

50%

< 1 m

30 % Min.

15%

D50

< 2

2.96

D97

< 5

10.09

Oil absorption

14 - 18 %

14 % Max.

Specific Gravity

4.3 g/cm3

4.2 g/cm3