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Isobutane
Isobutane
(
i
-butane
), also known as
methylpropane
, is a
chemical compound
with
molecular formula
and is an
isomer
of
butane
. It is the simplest
alkane
with a
tertiary carbon
. Concerns with depletion of the
ozone layer
by
freon
gases have led to increased use of isobutane as a gas for
refrigeration
systems, especially in domestic
refrigerators
and
freezers
, and as a
propellant
in
aerosol sprays
. When used as a
refrigerant
or a propellant, isobutane is also known as
R-600a
. Some
portable camp stoves
use a mixture of isobutane with
propane
, usually 80:20. Isobutane is used as a feedstock in the
petrochemical
industry, for example in the synthesis of
isooctane
.
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