Formaldehyde is an organic compound with the formula CH2O. It is the simplest aldehyde, hence its systematic name methanal.

Formaldehyde is a colorless gas with a characteristic pungent odor. It is an important precursor to many other chemical compounds, especially for polymers. In 2005, annual world production of formaldehyde was estimated to be 23 million tonnes (50 billion pounds).[4] Commercial solutions of formaldehyde in water, commonly called formalin, were formerly used asdisinfectants and for preservation of biological specimens.

In view of its widespread use, toxicity and volatility, exposure to formaldehyde is a significant consideration for human health.[5] On 10 June 2011, the US National Toxicology Programhas described formaldehyde as “known to be a human carcinogen“.

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