ethylene glycol

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ethylene glycol:

see glycolglycol
, dihydric alcohol in which the two hydroxyl groups are bonded to different carbon atoms; the general formula for a glycol is (CH2)n(OH)2.
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Ethylene Glycol


(also 1,2-ethanediol), HOCH2CH2OH, the simplest of the glycols.

Ethylene glycol takes the form of a colorless, viscous liquid with a sweet taste. It has a melting point of – 12.3°C, a boiling point of 196°C, and a density of 1.113 g/cm3 at 20°C. Miscible in all proportions with water, alcohol, and acetone, it is poorly soluble in ether and insoluble in chloroform, aliphatic hydrocarbons, and aromatic hydrocarbons. Ethylene glycol is hygroscopic.

An important property of ethylene glycol is its capacity to produce a marked lowering of the freezing point of water. A 40-percent solution of ethylene glycol in water has a freezing point of – 25°C, and a 60-percent solution has a freezing point of – 40°C. For this reason, ethylene glycol is commonly used in the manufacture of antifreezes.

Similar to other dihydric alcohols, ethylene glycol forms monoglycolates and diglycolates (such as HOCH2CH2ONa and NaOCH2CH2ONa), ethers, and esters. Among the other derivatives of ethylene glycol are cellusolves (the monoethers HOCH2CH2OR, where R is a hydrocarbon) and polyesters, including polyethylene terephthalate, that have the general formula (—OCH2CH2OCO—R—CO—)n; cellosolves are used as solvents, and ethylene glycol polyesters are used in the preparation of Dacron and similar synthetic fibers (seeLAVSAN and POLYESTER FIBER). Nitroglycol, a diester of ethylene glycol and nitric acid, is an explosive.

The principal industrial method for the production of ethylene glycol is the hydration of ethylene oxide at a pressure of 10 atmospheres and a temperature of 190°-200°C (or at 1 atmosphere and 50°-100°C) in the presence of 0.1–0.5 percent sulfuric or ortho-phosphoric acid; diethylene glycol and a small quantity of higher polymeric homologues of ethylene glycol are formed as by-products in this process. Ethylene glycol is used on a limited scale as a solvent for printer’s inks and certain other dyes, and it is used in the production of various inks, including inks for ball-point pens. It is also used in organic synthesis. Ethylene glycol is toxic.


ethylene glycol

[′eth·ə·lēn ′glī‚kȯl]
(organic chemistry)

ethylene glycol

A type of alcohol, completely miscible in water, used in latex and water-based paints to provide stability when frozen; used in heating and cooling systems as a fluid for transferring heat.
References in periodicals archive ?
After trying out several different polymer recipes and optimizing the conditions, it was found that the polymer made with ethyleneglycol dimethacrylate as cross-linker and vinylpyridine as functional monomer performed best when tested by immunoassay.
Summary:A novel surface molecularly imprinted polymer (SMIP) selective for di(2-ethylhexyl) phthalate (DEHP) was prepared on the surface of silica gel, which was modified by aminopropyltriethoxysilane and acryloyl chloride in a two-step method, with DEHP as template, methyl acrylic acid (MAA) as functional monomer, ethyleneglycol dimethacrylate (EGDMA) as cross-linker and azobisisobutyronitrile (AIBN) as initiator.
The aim of this work was to obtain and compare by dynamic light scattering (DLS) studies the temperature-pH responsive nanogels obtained from both nanolatexes (prepared by heterophase-polymerization process) and microemulsion polymerization using ethyleneglycol dimethacrylate (EGDMA) as crosslinking agent by means of gamma radiation.
Ethyleneglycol diglycidyl ether (EGDE, Fluka, Switzerland) was chemical purity and used as received.

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