Composé chimique de formule brute CH₂O₂ et de formule semi-développée H-COOH, formant le premier acide de la série des acides monocarboxyliques saturés.
eş: acide méthanoïque, acide hydroxycarboxylique, acide des fourmis, acide formicin
formic acid, methanoic acid (the simplest carboxylic acid, HCOOH, a colourless, corrosive liquid with a sharp odour; it is present in the stings of ants, bees and nettles, and is prepared industrially by the oxidation of methanol or formaldehyde)