Carbolic soap
![Bar of carbolic soap](/Images/godic/202501/03/Bar_of_carbolic_soap3417.jpg")
Carbolic soap is a mildly antiseptic soap containing carbolic acid and/or cresylic acid, both of which are (phenols) derived from either coal tar or petroleum sources.
In 1834, German analytical chemist Friedlieb Ferdinand Runge discovered a phenol, now known as carbolic acid, which he derived in an impure form from coal tar.