Answer:
Formic
Explanation:
Ants, especially red ants, inject formic acid(or metanoic acid) when they bite, which causes pain, itching and swelling.
In addition, formic acid is used in industry as a raw material for germicides, disinfectants and is also used by doctors to treat rheumatism.
Formic acid can also be found in bees, nettles, pines and also some fruits.
