The physical form and particle size are not determined for this product. Historical data suggests an average particle size of 0.22 mm with 98% being less than 0.315 mm. However, this testing is not performed routinely, nor is it included as a product specification.
18649
Silicon dioxide
acid washed
Synonym(s):
Cristobalite, Quartz, Sand, Silica
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| Size/SKU | Availability | Price |
|---|---|---|
1 kg | Available to ship TODAYfromMILWAUKEE | $115.00 |
2.5 kg | Available to ship TODAYfromMILWAUKEE | $235.00 $176.25 |
6 x 1 kg | Check Cart for Availability | $704.00 |
6 x 2.5 kg | Check Cart for Availability | $2,230.00 |
About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
NACRES:
SB.52
PubChem Substance ID:
UNSPSC Code:
12352303
MDL number:
$115.00
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form
solid
Quality Segment
quality
acid washed
impurities
≤0.01% in acid soluble iron (Fe), ≤0.5% soluble in HCl
loss
≤0.5% loss on ignition, 800 °C
refractive index
n
matrix
Silicon dioxide base material
mp
1610 °C (lit.)
density
2.6 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤100 mg/kg
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
General description
Silicon dioxide (SiO2) exists in three crystalline forms, namely quartz, tridymite and cristobalite. It reacts with hydrofluoric acid to form silicon tetrafluoride (SiF4) and water. Silicates are formed on reacting SiO2 with alkali melts. SiO2 is the main component in glass, brick and concrete and also forms the insulator in silicon devices. The alteration of the surface of SiO2 with (3-aminopropyl)triethoxysilane (APTES) for binding lactate dehydrogenase (LDH) to form an amino layer has been reported. The silicon-silicon dioxide structure has been investigated at liquid nitrogen temperature by electron spin resonance spectra.
Application
Silicon dioxide may be used to produce silicon by electrochemical reduction in the presence of calcium chloride (CaCl2) electrolyte. It may also be used to prepare FeCl3/SiO2, a supported reagent for the oxidative coupling reactions.
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This Item | |||
|---|---|---|---|
| form solid | form sand | form powder | form solid |
| matrix Silicon dioxide base material | matrix - | matrix - | matrix - |
| impurities ≤0.01% in acid soluble iron (Fe), ≤0.5% soluble in HCl | impurities - | impurities - | impurities - |
| quality acid washed | quality acid purified | quality - | quality - |
| density 2.6 g/mL at 25 °C (lit.) | density 2.6 g/mL at 25 °C (lit.) | density 2.6 g/mL at 25 °C (lit.) | density 2.6 g/mL at 25 °C (lit.) |
| mp 1610 °C (lit.) | mp 1610 °C (lit.) | mp 1610 °C (lit.) | mp 1610 °C (lit.) |
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Storage Class
11 - Combustible Solids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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