This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
Crude Carbolic Acid
A liquid consisting of various constituents of coal-tar, chiefly cresol and phenol, obtained by fractional distillation between the temperatures of 3020 and 392° F.; 1500 and 2000 C, and twice rectified between the temperatures of 3380 and 3740 F.; 1700 to 1900 C.
A nearly colorless or reddish, or brownish-red liquid of a strongly empyreumatic and creosote-like odor, having a benumbing, blanching and caustic effect upon the skin and mucous membrane, and a slightly acid reaction.
Used only externally.