Silicon Dioxide
Silica
Standards: Grace ED and Degussa
Molecular Formula: SiO2
Molecular Weight: 60.084
CAS: 14808-60-7;112945-52-5
EINECS: 215-683-2;238-878-4
Appearance: Loose white powder
Content of SiO2: 98% min
Heating loss(150℃):5%
Ignition loss (950℃):7% max
PH (5% solution): 5-8
Whiteness: 90% min
Bulk density (g/ml): 0.09 max
DBP oil absorption (cm3 /g): 200 min
Residue on 45um sieve: 0.05% max
Specific surface (m2 /g): 180-400
Particle size: 2-3μm