The sweet-tasting chemical that powers modern industry while posing a lethal hidden danger

Countries & Cities · Published 29 September 2026 Swipe more like this →

In short: Ethylene glycol is a versatile, odorless liquid essential for everything from plastic bottles to aircraft de-icing. Yet, its sweet taste masks a deadly toxicity. While it keeps engines running in freezing temperatures, accidental ingestion remains a significant global health risk, leading to tragic outcomes when contaminated in pharmaceutical products.

First prepared in 1856 by French chemist Charles-Adolphe Wurtz, ethylene glycol is a simple organic compound with a deceptively sweet flavor. Today, it is a high-production-volume chemical, with global output reaching approximately 20 million tons by 2010. Its primary industrial utility lies in the manufacture of polyester fibers and resins, such as polyethylene terephthalate, alongside its ubiquitous role in antifreeze formulations and geothermal heat pump systems.

The chemical's utility stems from its colligative properties; when mixed with water, it significantly lowers the freezing point, preventing ice formation in engines and pipelines. In the natural gas industry, it acts as a desiccant, removing water vapor to prevent the formation of clathrates. However, this industrial utility comes with environmental and biological costs. Because it is highly soluble and biodegradable, it can deplete oxygen in water bodies when released, harming aquatic life. More critically, its mammalian toxicity is severe; ingestion leads to the formation of oxalic acid, which causes central nervous system failure and kidney damage.

The danger of ethylene glycol is exacerbated by its palatability. To mitigate accidental poisoning, many jurisdictions now require the addition of bittering agents like denatonium benzoate. Despite these precautions, the substance remains a source of peril. In 2022, contaminated cough syrups containing ethylene glycol were linked to hundreds of child deaths in Indonesia, The Gambia, and Uzbekistan. These incidents highlight the stark contrast between the compound's vital role in global supply chains and the lethal consequences of its presence in consumer goods.

Production methods continue to evolve, moving from traditional ethylene oxidation to innovative processes like the oxidative carbonylation of methanol. As of 2015, China had established multiple large-scale plants to meet rising demand. While researchers explore safer alternatives like propylene glycol for consumer antifreeze, ethylene glycol remains an indispensable, if hazardous, pillar of modern chemical engineering.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• A sweet-tasting household chemical can cause fatal organ failure if ingested in small amounts.
• A strained three-atom ring sterilises syringes and underpins detergents
• Is the common additive in your food and medicine actually a hidden health risk?
• The sweet, viscous liquid that once served as a vital wartime defense priority
• From saving ancient artifacts to powering missiles, this petroleum derivative does it all.
• A fictional high school teacher who faked a cure to survive the zombie apocalypse
• The debut album from Spiritbox took its name from a notorious NSA cyberattack tool
• The woman who printed the truth when the state tried to silence it
• The high-altitude arena where grass meets engineering and global icons
• Born to rival CNN, Euronews now navigates a complex landscape of shifting ownership and identity.
• Why a phonetic pronunciation of two letters became a global oil empire
• How a British-led experiment in soft euroscepticism became a powerhouse of the European Parliament

More in Cities · More in Countries & Cities · Latest · A–Z · All topics