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 first African Americans to serve in the United States Congress were Republicans elected during the Reconstruction Era. After slaves were emancipated and granted citizenship rights, freedmen gained political representation in the Southern United States for the first time.t the same time, there was a different movement among whites in the South, who began to vote for Republican candidates for national and then state offices. A total of 139 African Americans have served in the United States Congress, mostly in the United States House of Representatives.