설명(영) |
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Hydrocarbons are the group of compounds containing only carbon and hydrogen. Hydrocarbons are generally derived from petrochemicals, but some of them are found in the plant and animal kingdom (e.g., Azulene or Squalene). Their structures can vary widely, and include aliphatic, alicyclic, and aromatic compounds. This category also includes some materials of complex composition which can be a source of a variety of
hydrocarbons.
As a rule these compounds are chemically inert. Typical are petrolatum, paraffin, and mineral oil, all of which are widely used as emollients and vehicles in cosmetics because of their nonvolatility and unctuous character. Lower molecular weight volatile hydrocarbons are used as solvents (e.g., Mineral Spirits). The hydrocarbons which are normally gases at room temperature (e.g., Butane or Propane) are used as aerosol propellants. Finally, it should be noted that many Synthetic Polymers are hydrocarbons (e.g., Polyethylene). |