CAS Number 112945-52-5
·
Linear Formula SiO2
·
Molecular Weight 60.08
Fumed silica (CAS number 112945-52-5), also known as pyrogenic
silica because it is produced in a flame, consists of microscopic
droplets of amorphous silica fused
into branched, chainlike, three-dimensional secondary particles which then
agglomerate into tertiary particles.
Detailed description
The resulting powder has an
extremely low bulk density and high surface area. Its three-dimensional
structure results in viscosity-increasing, thixotropic behavior when used as a thickener
or reinforcing filler.
Applications
Fumed silica serves as a universal thickening agent and an anticaking agent (free-flow agent) in
powders. Like silica gel, it serves as
a desiccant. It is used
in cosmetics for its
light-diffusing properties. It is used as a light abrasive, in products
like toothpaste. Other uses include
filler in silicone elastomer and viscosity adjustment in paints, coatings, printing
inks, adhesives and
unsaturated polyester resins. It is also used in the production of cat litter box filler and as a core
material in the production of vacuum insulated panels.
Health issues
Fumed silica is not listed as a carcinogen by OSHA, IARC, or NTP. Due to its fineness and thinness, fumed silica can easily
become airborne, making it an inhalation risk, capable of causing irritation.
PRICE
$428.46/KG OR $194.75/IB
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