Corrosive substance due to their capabilities of dissolving greases, proteins or mineral deposits such as limescale inside water pipes. In chemical uses, high chemical reactivity is often desirable, as the rates of chemical reactions depend on the activity (effective concentration) of the reactive species. For instance, catalytic sulfuric acid is used in the alkylation process in an oil refinery: the activity of carbocations, the reactive intermediate, is higher with stronger acidity, and thus the reaction proceeds faster. Once used, corrosives are most often recycled or neutralized. However, there have been environmental problems with untreated corrosive effluents or accidental discharges. Corrosive substance A
CSX milepost prefixes CSX milepost prefixes Most CSX railroad lines are given lettered prefixes before milepost numbers. These prefixes are one to three letters long with the first letter usually refer to the former company. For instance, prefixes beginning with "S" were part of the Seaboard Air Line Railroad. Some of these company prefixes include the following: Lines that were formerly part of the Atlantic Coast Line Railroad system are given milepost prefixes beginning with the letter A. For instance, milepost A790 is on the main line in Orlando, Florida, 1000 miles south of the beginning in Richmond, Virginia, and milepost AN587 is