What does formic acid smell like?

Answer 1

It is a difficult to describe odor, Acrid and reminiscent of urine mixed with cleaning products.

It's best described as the smell of crushed ants.

That said, some people can't smell ants, this is why many people can't smell formic acid.

Answer 2

Formic acid has a pungent odor that is often described as sharp, similar to the smell of vinegar or a stinging sensation.