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Formic Acid

CAS : 64-18-6

Formic Acid


Formic acid, systematically named methanoic acid, is the simplest carboxylic acid, and has the chemical formula H2CO2. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants. Esters, salts, and the anion derived from formic acid are called formates. Industrially, formic acid is produced from methanol.

Formic Acid


Appearance Colorless fuming liquid
Odor Pungent, penetrating
Density 1.220 g/mL
Melting point 8.4 °C (47.1 °F; 281.5 K)
Boiling point 100.8 °C (213.4 °F; 373.9 K)
Solubility in water Miscible
Solubility Miscible with ether, acetone, ethyl acetate, glycerol, methanol, ethanol   Partially soluble in benzene, toluene, xylenes


The principal use of formic acid is as a preservative and antibacterial agent in livestock feed. When sprayed on fresh hay or other silage, it arrests certain decay processes and causes the feed to retain its nutritive value longer, and so it is widely used to preserve winter feed for cattle. In the poultry industry, it is sometimes added to feed to kill salmonella bacteria. Other uses:

·        It is used to process organic latex (sap) into raw rubber.

·        Beekeepers use formic acid as a miticide against the Varroa mite.

·        It is of minor importance in the textile industry and for the tanning of leather.

·        Some formate esters are artificial flavorings or perfumes.

·        It is the active ingredient in some brands of household limescale remover.


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