CARBOLIC ACID
This is got from coal tar and petroleum. When full strength and pure it is in the form of crystals, but is generally bought as a liquid. It is a disinfectant and an antiseptic, and while used internally for some purposes, is largely used internally in washes and solutions. Its principal use is in bathing wounds and sores. Care should be taken not to have a wash contain too much of the acid, as it will burn the wound and stop the healing action. It is a corroding poison taken internally. It should be just strong enough to kill bacteria; say, 1 part to 1,000 parts of water. A very good healing salve is made when 5 drops of pure carbolic acid is used to 4 tablespoonfuls of vaseline.