Question

Is methanoic acid responsible for painful stings of nettle plant leaf?

Answer 1

Stinging hair of nettle leaves inject methanoic acid causing burning sensation or pain.

Your answer is here

Answer 2

Yes,

$\mathcal\blue{Formic\:Acid(HCOOH)}$

$\mathcal\red{Or}$

$\mathcal\blue{Methanoic\:Acid}$