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Glycerine

Name (also glycerol or propanetriol) for a colourless, syrupy, trivalent type of alcohol with a slightly sweet taste. The name is derived from the Greek "glykos" (sweet). However, glycerine should not be confused with the divalent alcohols of the glycol group, such as ethylene glycol or diethylene glycol, which also have a sweet flavour, but are more similar to glycerine. These are used as antifreeze agents and are harmful to health.

Occurrence

Glycerine occurs naturally in seed oils (e.g. from rapeseed, soya, sunflower, olive, coconut and palm fruits), in fatty fruits (e.g. avocado) and also in grapes. The natural content in healthy grapes is between 6 and 10 g/l, and can reach up to 25 g/l in noble sweet wines. A moderate increase can also be achieved through the traditional Governo process used in Chianti.

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