I-carbolic acid engahluziwe: inhlanganisela emnyama enamafutha ye-phenol, ama-cresol, amanzi namafutha entiyela, ehlukaniswe kuwoyela we-carbolic nge-caustic soda ne-asidi. Isetshenziswa njengesibulali-magciwane, futhi ihlanziswa ibe yi-carbolic acid enamakristalu (i-phenol) ne-cresylic acid. Inobuthi futhi iyashisa isikhumba.