Item

Specification

Result

Appearance

White Granular

White Granular

Loss on drying 105℃ 2h %

4.5-6.9

6.23

Lgnition loss   1000℃  %

≤6.0

4.55

PH value

6.4—7.2

6.72

BET specific surface area  m²/g

161-190

183

DBP absorption value  cm³/g

2.20—2.80

2.38

SiO₂ %(Dry basis)

≥92

92.7

Na₂SO₄ %

≤2.0

1.06

Fe mg/KG

≤500

318

20 mesh sieve residue

Min65

85

80 mesh sieve residue

Min75

93