Merck’s 1899 Manual of the Materia Medica
Sozolic acid. Ortho-phenol-sulphonic acid. - Yellow-brown liq.; odor carbolic acid - sol. In alcohol, glycerin; all proportions water. - Antiseptic, Disinfectant. - Usss: Extern., in diseases of bladder, eye, skin, and in diphtheria, laryngitis, gingivitis, eta - applied in 1 to 10% solut.