BET specific surface area (m2 / g)

135±15

160±15

185±15

Silica content (dry goods)%

≥98

≥98

≥98

Heating loss (%)

6.0-7.2

6.0-7.2

6.0-7.2

PH value

6.9±0.3

6.9±0.3

6.0-7.0

DBP oil absorption (cm3 / g)

1.80-2.50

2.00-2.50

1.80-2.50

Sulfate content (%)

≤1.5

≤1.5

≤1.5

The total iron content (mg / kg)

≤150

≤150

≤150

Exterior

According to customer requirements, can be supplied in powder, beads, flaky particles.