| propylene | <chemistry> A colourless gaseous hydrocarbon (C3H6) of the ethylene series, having a garlic odour. It occurs in coal gas, and is produced artificially in various ways. Synonym: propene. Origin: Cf. F. Propylene. Source: Websters Dictionary (01 Mar 1998) |
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| propylene glycol | <chemical> A clear, colourless, viscous liquid used as a humectant and solvent in pharmaceutical preparations. Derivative of propylene glycol (1,2-propanediol). They are used as humectants and solvents in pharmaceutical preparations. Pharmacological action: cryoprotective agents, solvents, vehicles. (12 Dec 1998) |