Silicon dioxide

$15.65 - $110894

Price

Brand	Packaging	Price	Product name
AK Scientific 1001AP	5g	$69	3-MercaptopropylethylsulfideSilica,60~200μmparticlesize
Alfa Aesar 044386	1kg	$69.1	Silica gel desiccant, -3+8 Mesh Granules
Alfa Aesar 045831	25g	$70	Silica gel, preparative chromatography grade, spherical, 20 micron APS, 100 angstroms
Alfa Aesar 042782	250g	$70.65	Silicon(IV) oxide, amorphous fumed, surface treated, S.A. 205-245m²/g
Alfa Aesar 042570	250g	$70.65	Silica gel 60, 0.040-0.063mm (230-400 mesh), 99.5% (metals basis)
Alfa Aesar 042765		$70.65
Alfa Aesar 089709	250g	$64.7	Silicon(IV) oxide, 99.5% (metals basis)
Alfa Aesar 042757	250g	$65.65	Silica gel 60, with fluorescent indicator, 0.060-0.2mm (70-230 mesh)
Alfa Aesar 044781	25g	$65.8	Silicon(IV) oxide, amorphous, nanopowder, 99.9% (metals basis)
Alfa Aesar L14004	500g	$62.4	Silica gel 60, 0.036-0.071mm (215-400 mesh)

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Melting point	>1600 °C(lit.)
Boiling point	>100 °C(lit.)
Density	2.2-2.6 g/mL at 25 °C
vapor pressure	13.3hPa at 1732℃
refractive index	1.46
Flash point	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
color	White to yellow
Specific Gravity	2.2
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)