Chemical Name: Silicon Dioxide
CAS No.:7631 - 86 - 9
Product Categories:Inorganic chemistry
Appearance:white power
Type Of Transportation:By Air/By Sea
Sample:Available
Properties Of Silicon Dioxide 7631 - 86 - 9
Melting point | >1600 °C(lit.) |
Boiling point | >100 °C(lit.) |
bulk density | 200-800kg/m3 |
density | 2.2-2.6 g/mL at 25 °C |
vapor pressure | 13.3hPa at 1732℃ |
refractive index | 1.46 |
Fp | 2230°C |
storage temp. | 2-8°C |
solubility | Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides. |
pka | 6.65-9.8[at 20 ℃] |
form | suspension |
Specific Gravity | 2.2 |
color | White to yellow |
PH | 5-8 (100g/l, H2O, 20℃)(slurry) |
Odor | at 100.00?%. odorless |
Resistivity | 1∞10*20 (ρ/μΩ.cm) |
Water Solubility | insoluble |
Sensitive | Hygroscopic |
Hydrolytic Sensitivity | 6: forms irreversible hydrate |
Crystal Structure | Trigonal |
Merck | 14,8493 |
Exposure limits | NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3 |
Stability: | Stable. |
CAS DataBase Reference | 7631-86-9(CAS DataBase Reference) |
IARC | 3 (Vol. Sup 7, 68) 1997 |
NIST Chemistry Reference | Silicon(iv) oxide(7631-86-9) |
EPA Substance Registry System | Silica (7631-86-9) |