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.
Mississippi sent the first two (and only) black senators of this period to Congress. The first senator, Hiram R. Revels (1827-1901), was a free black from North Carolina who served as a chaplain to black troops during the Civil War. Revels moved to Natchez in 1866 and founded schools for freedmen throughout the South.