- Mono
Ethylene glycol or MEG is otherwise called as 1,2-ethanediol.
- MEG is an
alcohol with two -OH groups (a diol), a chemical compound widely
used as an automotive antifreeze.
- In its pure
form, MEG is an odorless, colorless, syrupy liquid with a sweet
taste. Ethylene glycol is toxic.
- The major
danger from ethylene glycol is ingestion. Due to its sweet taste,
children and animals will sometimes consume large quantities of it
if given access to antifreeze.
- MEG is
miscible with water and some other solvents, slightly soluble in
ether, but practically insoluble in benzene, chlorinated
hydrocarbons, petroleum ethers, and oils.
- Ethylene
glycol is produced from ethylene, via the intermediate ethylene
oxide. Ethylene oxide reacts with water to produce ethylene
glycol.
- The major
use of ethylene glycol is as an antifreeze in automobiles and
personal computers.
- Ethylene
glycol can be recovered from the natural gas and reused as an
inhibitor after a purification treatment that removes water and
inorganic salts.
- Ethylene
glycol has become increasingly important in the plastics industry
for the manufacture of polyester fibers and resins, including
polyethylene terephthalate, which is used to make plastic bottles
for soft drinks.
- The
antifreeze capabilities of ethylene glycol have made it an
important component of vitrification mixtures for low-temperature
preservation of biological tissues and organs.
- Large bolus
doses of ethylene glycol (EG) are developmentally toxic in
rodents. However, human occupational and consumer exposures
typically involve low doses and slow dose-rates.
- On a
worldwide basis, approximately two-thirds of ethylene glycol is
used as a chemical intermediate, with a further one-quarter used
as an antifreeze in engine coolants.
- MEG demand
growth has been driven by a combination of increases in both
domestic and export demand for downstream products, primarily
polyester fibre and polyethylene terephthalate (PET) resin.
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