I.The carbonate of trimethylsulphine is obtained by the action of carbonate of silver on the iodide of trimethylsulphine. The solution of the salt may be evaporated to a syrup in the waterbath. On standing for some weeks over sulphuric acid in vacuo it crystallises out in exceedingly hygroscopic prismatic crystals, containing water of crystallisation, and having a strong alkaline reaction.

Heated in the air to 100° the salt gives off water, sulphide of methyl, and carbonic acid. Heated in a sealed tube to 100° C. for about eight hours it was almost entirely decomposed, gave off a gas consisting entirely of carbonic acid, and yielded two layers of liquid—the upper, sulphide of methyl; the lower, water and methylic alcohol.