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Propylene glycol is a clear, colorless and hygroscopic liquid. Propylene glycol contains an asymmetrical carbon atom, so it exists in two enantiomers. The commercial product is a racemic mixture.Pure optical isomers can be obtained by hydration of optically pure propylene oxide.t is produced on a large scale and is primarily used in the production of polymers but also sees use in food processing as the E-number E1520. The compound is sometimes called Î±-propylene glycol to distinguish it from the isomer propane-1,3-diol (Î²-propylene glycol).
Stearic acid. Water soluble wax, Carbowax, polyethylene glycol and PEG are all terms used to describe the same material. Chemically they are polyethylene glycols of varying degrees of polymerisation and molecular weights, or polyethylene glycol fatty acid esters, such as polyethylene glycol monostearate.ike paraffin waxes, polyethylene glycol is usually a mixture of materials with varying molecular weights, due in this case to varying degrees of polymerisation, rather than a single molecular entity. When purchasing, the molecular weight has to be specified to ensure the correct material.