Silicon dioxide CAS NO.7631-86-9

Silicon dioxide Basic information

Product Name:    Silicon dioxide
Synonyms:    SILICA GEL 60 PF254 FOR PREPARATIVE LAYE;LICHROSORB SI 100 (10 MYM) 10 G;TLC-SILICA GEL 60 GF254 MEAN PARTICLE SI;LICHROSORB SI 100 (10 MYM) 100 G;SEA SAND EXTRA PURE 5 KG;SILICA GEL 60 GF254 FOR THIN-LAYER CHROM;SILICA GEL 60 PF254 + 366 FOR PREPARATIV;SEA SAND EXTRA PURE 25 KG
CAS:    7631-86-9
MF:    O2Si
MW:    60.08
EINECS:    231-545-4
Product Categories:    
Mol File:    7631-86-9.mol

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