When used in the extemporaneous preparation of topical medications, it is supplied in the form of coal tar topical solution USP, which consists of a 20% w/v solution of coal tar in alcohol, with an additional 5% w/v of polysorbate 80 USP; this must then be diluted in an ointment base such as petrolatum.
Hiram Rhodes Revels, R-Miss. Revels was the first African-American to serve as a state senator, representing Mississippi. Revels was elected by the Mississippi State Senate to fill a vacant U.S. Senate seat, which was abandoned by Albert G. Brown when Mississippi seceded from the Union during the Civil War.
The sudden addition of millions of black voters resulted in a number of African Americans being voted into Congress. The first African American elected to the U.S. Senate was Hiram Rhodes Revels, who in 1869 filled the seat vacated by Confederate President Jefferson Davis. Also in 1869, fellow Republican Joseph H. Rainey became the first black member of the U.S. House of Representatives.