2,2-Bis(ethylsulfonyl)butane 76-20-0 Butane, 2,2-bis(ethylsulfonyl)- Diethylsulfonmethylethylmethane Ethylsulfonal Methylsulfonal Metilosulfonal NSC3994 SULFONETHYLMETHANE Sulfonethylmethanum Tional Trional WLN: WS2&X2&1&SW2