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..
Phenolsulphuric Acid is formed by adding Sulphuric Acid to crystallized Carbolic Acid; on heating this mixture it becomes Paraphenol-sulphuric Acid, which yields a clear solution with water. C6H5OH+H2So4 =C6H5Hso4+H2O. Barium Carbonate is then added, and Barium Sulpho-carbolateis precipitated. 2C6H5Hso4+BaCo3=Ba(So3c6h4(OH) )2+H2O +Co2. This is treated with water and Sodium Carbonate; a solution of Sodium Sulphocarbolate is formed, and Barium Carbonate is precipitated. Ba(So3c6h4(OH) )2+Na2Co3=2NaSo3c6h4(OH)+BaCo3. The solution is evaporated to crystallization.
Colorless, transparent, rhombic prisms, odorless and having a cooling, saline, slightly bitter taste. Solubility. - In 4.8 parts of water; in 132 parts of Alcohol.
Dose, 5 to 30 gr.; .30 to 2.00 gm.
This substance is antiseptic, like carbolic acid, and may be used externally for this purpose. Internally it is occasionally given in the hope of controlling gastric fermentation.