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**Systematic name:** Methanal
**Molecular formula:** CHâ‚‚O
**Chemical formula (condensed):** HCHO
**Molar mass:** 30,03 g/mol
**Information:** Methanal is a colourless, acrid, toxic, carcinogenic gas readily soluble in water.
**Use:** A 40% aqueous formaldehyde solution is called formalin and is used as a disinfectant and preservative. It is a raw material for the production of many plastics.
