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Appearance:White to yellow suspension
Throughput:100|Kilogram|Month
pd_productuse:intermediate
Delivery Time:large stock
Purity:99% purity
Silicon dioxide Chemical Properties
Melting point >1600 °C(lit.)
Boiling point >100 °C(lit.)
density 2.2-2.6 g/mL at 25 °C
refractive index 1.46
Fp 2230°C
storage temp. Refrigerator (+4°C)
solubility Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.
form suspension
color White to yellow
Specific Gravity 2.2
Specific Gravity 0.97
Specific Gravity 1.29
PH 5-8 (100g/l, H2O, 20℃)(slurry)
Water Solubility insoluble
Sensitive Hygroscopic
Hydrolytic Sensitivity 6: forms irreversible hydrate
Hydrolytic Sensitivity 5: forms reversible hydrate
Hydrolytic Sensitivity 4: no reaction with water under neutral conditions
Merck 14,8493
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)
Safety Information
Hazard Codes Xn,Xi
Risk Statements 36/37/38-36/37-22-43-52/53-36/38
Safety Statements 26-37/39-36-36/37/39-36/37-61
HS Code 2811221000
Toxicity LC inhalation in rat: > 200gm/m3/1H
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