6) Formic Acid

Formic acid is present in the stings and bites of many insects such as bees and ants. It may irritate. It is also present in the leaves of stinging nettle. It may affect the wart by the way formaldehyde acts on warts or by the action of caustic soda. The effect and strength of the formic acid are between the salicylic acid and trichloroacetic acid. Salicylic acid is the weakest, and trichloroacetic acid is of medium potential.



