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Merck
CN

S5380

Silica, fumed

powder, 0.011 μm

Synonym(s):

Silica, Silicic anhydride, Silicon dioxide, Silicon dioxide amorphous

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About This Item

Linear Formula:
SiO2
CAS Number:
Molecular Weight:
60.08
UNSPSC Code:
12352200
MDL number:
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form

powder

refractive index

n20/D 1.46 (lit.)

particle size

0.011 μm

density

4.5 lb/cu.ft±0.5 lb/cu.ft at 25 °C (bulk density)(lit.)

cation traces

metal ions:, practically free

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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.


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