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|Section2= |Section7= |Section8= }} Methylsulfonylmethane (MSM) is an organosulfur compound with the formula (CH3)2SO2. It is also known by several other names including DMSO2, methyl sulfone, and dimethyl sulfone.〔(【引用サイトリンク】title= Various Names for MSM )〕 This colorless solid features the sulfonyl functional group and is considered relatively inert chemically. It occurs naturally in some primitive plants, is present in small amounts in many foods and beverages, and is marketed as a dietary supplement. It is also commonly found in the atmosphere above marine areas, where it is used as a carbon source by the airborne bacteria ''Afipia'',〔(page 5 of 6, quote slightly edited).〕 and is found distinctively in human melanoma cells.〔(【引用サイトリンク】url=http://theinstitute.ieee.org/technology-focus/technology-topic/sniffing-for-cancer )〕 ==Structure and chemical properties== MSM and the corresponding sulfoxide dimethyl sulfoxide ((CH3)2SO, DMSO) have different physical properties. MSM is a white crystalline solid at STP (m.p. = 109 °C) whereas DMSO is a liquid under standard conditions. The sulfoxide is a highly polar aprotic solvent and is miscible with water; it is also an excellent ligand. MSM is less reactive than DMSO because the S-atom of the sulfone is already in its highest oxidation state (VI). Indeed oxidation of the sulfoxide produces the sulfone, both under laboratory conditions and metabolically. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「methylsulfonylmethane」の詳細全文を読む スポンサード リンク
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