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84880

Sigma-Aldrich

Silicon dioxide

purum p.a., acid purified

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Synonym(s):
Cristobalite, Quartz, Sand, Silica
Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
MDL number:
UNSPSC Code:
12352303
PubChem Substance ID:
NACRES:
NA.21

grade

purum p.a.

Quality Level

form

powder or crystals

quality

acid purified

loss

≤0.1% loss on ignition

refractive index

n20/D 1.544 (lit.)

particle size

40-200 mesh

mp

1610 °C (lit.)

density

2.6 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤200 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤100 mg/kg
K: ≤100 mg/kg
Na: ≤200 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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General description

Silicon dioxide is one of the important constituents of sedimentary rock bauxite, basalt fibers and ceramic fibers. It is added to cement for improving the hydraulic properties of cement.
may contain dark particles

Application

Silicon dioxide may be employed in the preparation of calcium silicide.

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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