Isobutane, aswell accepted as methylpropane, is an isomer of butane. It is the simplest alkane with a tertiary carbon. Concerns with burning of the blast band by freon gases accept led to added use of isobutane as a gas for algidity systems, abnormally in calm refrigerators and freezers, and as a propellant in aerosol sprays. If acclimated as a refrigerant or a propellant, isobutane is aswell accepted as R-600a. Some carriageable affected stoves use a admixture of isobutane with propane, usually 80:20. Isobutane is acclimated as a feedstock in the petrochemical industry, for archetype in the amalgam of isooctane.
Its UN amount (for chancy substances see shipping) is UN 1969. Isobutane is the R accumulation for the amino acerbic leucine.
Uses
The use in refrigerators started in 1993 if Greenpeace presented the Greenfreeze activity with the German aggregation Foron.
Blends of pure, dry "isobutane" (R-600a) (commercial appellation acclimated to call isobutane mixtures) accept negligible blast burning abeyant and actual low Global Warming Abeyant (having a amount of 3.3 times the GWP of carbon dioxide) and can serve as a anatomic backup for R-12, R-22, R-134a, and added chlorofluorocarbon or hydrofluorocarbon refrigerants in accepted anchored algidity and air conditioning systems.
As a propellant for aerosol cans and cream products.
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