Methanedisulfonic acid
# Methanedisulfonic acid

Methanedisulfonic acid is the organosulfur compound with the formula $CH_2(SO_3H)_2.$ It is the disulfonic acid of methane. It is prepared by treatment of methanesulfonic acid with oleum. Its acid strength $(pK_a)$ is comparable to that of sulfuric acid.

