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About This Item
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
MDL number:
UNSPSC Code:
23201100
PubChem Substance ID:
NACRES:
SB.52
Product Name
Silica, 99.8%
grade
standard
Quality Level
assay
99.8%
form
powder
technique(s)
LPLC: suitable
surface area
175-225 m2/g
matrix
Silica
matrix active group
silica
particle size
0.011 μm
pore size
60 Å mean pore size
separation technique
hydrophilic interaction (HILIC)
SMILES string
O=[Si]=O
InChI
1S/O2Si/c1-3-2
InChI key
VYPSYNLAJGMNEJ-UHFFFAOYSA-N
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General description
Silica is a naturally occurring material in minerals, flint and in some plants in crystalline phase. Silica commonly used in industries is in synthetic form. Surface area, pore volume, pore size and particle size are independently controllable to some extent. The crystalline silica may be classified based on atmospheric pressure as:
a. Quartz: = 1143K
b. Tridymite: 1143 - 1743K
c. Cristobalite: = 1743, over 1973K it forms amorphous vitreous silica glass.
a. Quartz: = 1143K
b. Tridymite: 1143 - 1743K
c. Cristobalite: = 1743, over 1973K it forms amorphous vitreous silica glass.
Application
Silica was used in synthesis of silicalite. Silica was used to assist the catalytic growth of oxide and nitride nanowires.
Features and Benefits
Has interesting thickening and thixotropic properties, and an enormous external surface area.
Other Notes
Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long.
May contain adsorbed H2O and CO2 which is removable by calcining at >900°C
Storage Class
13 - Non Combustible Solids
wgk_germany
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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