title: Methanedisulfonic acid
text: # 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.
  
  