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Aerosol spray - Wikipedia, the free encyclopedia |
 | | Aerosol spray is the name given to a type of canister containing liquid under pressure from pressurized vapor in equilibrium with another liquid, which often also dissolves the payload (see propellant below). |
 | | The modern aerosol spray can was invented in Oslo in 1926 by Erik Rotheim, a Norwegian chemical engineer. |
 | | Medicinal aerosols such as asthma inhalers use hydrofluoroalkanes (HFA): either HFA 134a (1,1,1,2,-tetrafluoroethane) or HFA 227 (1,1,1,2,3,3,3-heptafluoropropane) or combinations of the two. |
| en.wikipedia.org /wiki/Aerosol_spray (556 words) |
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