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Parameter |
Attribute |
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Ethylene glycol |
Ethylene glycol, 1,2-Ethanediol, Ethylene alcohol, Hypodicarbonous acid, Monoethylene glycol, 1,2-Dihydroxyethane, MEG |
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Formula |
C2H6O2 |
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Structure |
  |
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IUPAC |
Ethane-1,2-diol |
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CAS |
107-21-1 |
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Molar mass |
62,068 g/mol |
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Density |
1,1132 g/cm3 |
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Solubility |
Miscible in water and in most organic solvents |
Ethylene glycol. According to the IUPAC nomenclature, 1,2-ethanediol is also called differently or the following names are also accepted: monoethylene glycol (MEG), 1,2-Ethanediol, glycol, 1,2-Dihydroxyethane, ethylene alcohol. It is an odorless, colorless, sweet-tasting, viscous liquid.
In the heating/refrigeration industry, monoethylene glycol is used as a heat transfer agent or component of a heat transfer agent. Having half the heat capacity compared to water, ethylene glycol is able to receive and release heat much faster, as a result of which heat exchange is accelerated. Due to its higher boiling point, ethylene glycol helps to transfer higher temperatures than water. The mixture of ethylene glycol and water provides additional benefits to coolants and antifreeze solutions, such as preventing corrosion and acid breakdown, as well as inhibiting the growth of most microbes and fungi. The exact concentrations are selected based on the required freezing temperature according to the schedule below.
In antifreezes, monoethylene glycol is used to lower the freezing temperature and prevent the formation of water crystals. Even after freezing, the mixture of ethylene glycol and water forms small crystals, and their aggregate is not like a solid structure, but more like a mush.
In the polymer industry, ethylene glycol is one of the main components, for example in the production of PET (polyethylene terephthalate), when the first stage is the formation of terephthalic acid and ethylene glycol ester, and the second stage is the polymerization process. Depending on the depth of polymerization, products range from films to plastic mass for transparent PET bottles.
In the petroleum industry, ethylene glycol is used as a desiccant for natural or petroleum gas. Due to its hygroscopic properties, ethylene glycol absorbs water vapor from gases, so they become dry and do not cause corrosion.
At home, we can find MEG in glass cleaners or shoe cleaners. It is not a major component, but due to its hygroscopic properties, it adds moisture/shine to the shoe for a longer period of time
In the wood industry, ethylene glycol is used as an antiseptic against mold and rot. It can be used for both prevention and elimination of the effects. This is one of the cheapest measures to stop rotting of wooden ships.
In biology, monoethylene glycol is used as an alternative to formaldehyde to preserve various specimens.
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Signal word: Warning |
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Hazard icons:
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Danger phrases: H302 Harmful if swallowed H373 May cause damage to organs (organs) if the substance is exposed for a long time or repeatedly (if swallowed) |
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Precautionary statements: P260 Do not breathe mist/vapor. P270 Do not eat, drink or smoke when using this product. P301+P312 IF SWALLOWED: Call a POISON CONTROL AND INFORMATION OFFICE or seek medical advice if you feel unwell. |
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