Is fluorine caustic?

Probably because it was first recognized in fluorspar or fluorite (which is calcium fluoride).

Fluoride(s) may be found in toothpaste and is even added in trace quantities to drinking water in certain parts of the world. Fluorine is extremely reactive and not found in nature. It may be found...

The bond is covalent. Two atoms of the same element will never form an ionic bond with each other.

non caustic

The name fluorine comes from the Latin verbfluere, meaning "to flow." The material fluorspar was widely used in the 16th century as a flux, a chemical cleaning agent that facilitates soldering,...