Carbolic soap, sometimes referred to as red 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. One of the earliest manufacturers of carbolic soap was F. C. Calvert and Company of Manchester, England, established in 1859 and taken over by Unilever in 1965. In the United States, the license for manufacturing carbolic soap was held by James Buchan and Company.In 1894, William Lever, 1st Viscount Leverhulme, introduced the Lifebuoy brand of carbolic soap to the market.