Ethylene glycol
Ethylene glycol is an organic compound with the formula (CH2OH)2. It is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, flammable, viscous liquid. Ethylene glycol has a sweet taste, but it is toxic in high concentrations.
Ethylene glycol is also useful as a reagent in organic chemistry, useful particularly as a protecting group for carbonyl groups (C=O), by adding to the carbonyl groups, it forms an acetal, useful for protecting the C=O bond, in order to guide the reagent towards less reactive groups. The ethylene glycol protecting group can then later in the synthesis be selectively removed, leaving a C=O bond in the final product.
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