Item

Specification

Grade

wfls35

Form

White powder

Whiteness

                                 ≥ 98

SiO2 (dry product)%

≥99.9

PH value

6.5-7.5

BET m2/g

260-280

DBP ml/100g

280-320

Particle size  um

4-45

Moisture content

2%

Refraction quotiety

1.10

Lead content

0.0001mg/kg

As content

0.0003mg/kg

Other heavy metal

≤0.001%