Which chemical disinfectant works by methylating enzymes and nucleic acids and is known for being toxic and carcinogenic?

sorbic acid

triclosan

formaldehyde

hexaclorophene

Answer: Formaldehyde

Explanation:

The chemical agent that is carcinogenic in nature is Formaldehyde. It causes irritation in the living tissues and therefore should not be used as an antiseptic.

This can be used a chemical disinfectant which works by killing the harmful organisms by methylating enzymes and nucleic acid. This is toxic in nature and hence used as chemical disinfectant.