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|Section1= | CASNo = 74-95-3 | CASNo_Ref = | PubChem = 3024 | ChemSpiderID = 2916 | ChemSpiderID_Ref = | EINECS = 200-824-2 | UNNumber = 2664 | MeSHName = methylene+bromide | ChEBI = 47077 | ChEBI_Ref = | RTECS = PA7350000 | Beilstein = 969143 | Gmelin = 25649 | SMILES = BrCBr | StdInChI = 1S/CH2Br2/c2-1-3/h1H2 | StdInChI_Ref = | StdInChIKey = FJBFPHVGVWTDIP-UHFFFAOYSA-N | StdInChIKey_Ref = }} |Section2= |Section3= |Section4= |Section5= }} Dibromomethane or methylene bromide, or methylene dibromide is a halomethane. It is slightly soluble in water but very soluble in carbon tetrachloride, diethyl ether and methanol. Its refractive index is 1.5419 (20 °C, D). ==Preparation== Dibromomethane can be prepared from bromoform by reaction :CHBr3 + Na3AsO3 + NaOH → CH2Br2 + Na3AsO4 + NaBr using sodium arsenite and sodium hydroxide.〔(Methylene bromide preparation )〕 Another way is to prepare it from diiodomethane and bromine. 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「dibromomethane」の詳細全文を読む スポンサード リンク
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