Formic acid 85% 64-18-6 Colorless smoky flammable liquid

Formic acid is a kind of organic matter, chemical formula HCOOH, molecular weight 46.03, common name formic acid, is the simplest carboxylic acid. It is a colorless and pungent liquid. Formic acid is a weak electrolyte, but its aqueous solution is weakly acidic and corrosive, and can stimulate skin blistering. It is commonly found in the secretions of bees, certain ants, and caterpillars. It is an organic chemical raw material and is also used as a disinfectant and preservative.

Formic acid is the only acid in the carboxyl group connected to the hydrogen atom, the hydrogen atom repulsive electron force is much smaller than the hydrocarbon group, so that the carboxyl carbon atom electron density is lower than other carboxyl acids, and because of the conjugation effect, the carboxyl oxygen atom on the electron is more inclined to carbon, so the acid is stronger than other carboxyl acids in the same series. Formic acid has the same properties as most other carboxylic acids in that it does not normally form an acyl chloride or anhydride. Formic acid in aqueous solution is a simple weak acid, acidity coefficient (pKa)=3.75(at 20℃), 1% formic acid solution pH value is 2.2.