Will muriatic acid kill fleas

Yes, muriatic acid can kill fleas. The product in question also carries the name hydrochloric acid and represents an extreme measure that is unfriendly to people, pets, places and wildlife. Fleas respond to such gentler measures as cedar chips; diluted salt, soap or vinegar sprays; and essential cedarwood, eucalyptus, lavendar, lemongrass and peppermint oils.