Of or relating to the replacement of three of several atoms or groups in a compound, such as an amine in which three valences of the functional group are taken by carbon atoms. c. Of or relating to salts of acids containing three replaceable hydrogen atoms.
Hayden is a town in Blount County, Alabama, United States. At the 2010 census the population was 444.[3]
Dallas County, Alabama. Dallas County is a county of the U.S. state of Alabama. As of the 2010 census, its population was 43,820. The county seat is Selma. Its name is in honor of United States Secretary of the Treasury Alexander J. Dallas, who served 1814-1816. Dallas County comprises the Selma, AL Micropolitan Statistical Area.