查看“︁二氟二氯甲烷”︁的源代码

{{chembox
| Name = 二氟二氯甲烷
| ImageFileL1 = Dichlorodifluoromethane.png
| ImageSizeL1 = 
| ImageFileR1 = Dichlorodifluoromethane-3D-vdW.png
| ImageSizeR1 = 
| IUPACName = Dichlorodifluoromethane
| OtherNames = 二氟二氯化碳<br />二氯二氟甲烷<br />氟利昂-12<br />氟里昂-12<br />卤代烷 122<br />海龍122<br />CFC-12<br />R-12<br />P-12<br />E 940
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 6151
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 2106634
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = OFM06SG1KO
| InChIKey = PXBRQCKWGAHEHS-UHFFFAOYAX
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/CCl2F2/c2-1(3,4)5
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = PXBRQCKWGAHEHS-UHFFFAOYSA-N
| CASNo = 75-71-8
| CASNo_Ref = {{cascite|correct|CAS}}
| EINECS = 200-893-9
| PubChem = 6391
| SMILES = ClC(Cl)(F)F
| InChI = 1/CCl2F2/c2-1(3,4)5
| RTECS = PA8200000
| KEGG_Ref = {{keggcite|correct|kegg}}
| KEGG = D03789
| UNNumber = 1028
  }}
|Section2 = {{Chembox Properties
|   Formula = CCl<sub>2</sub>F<sub>2</sub>
|   MolarMass = 120.91
|   Appearance = 有类似[[醚]]气味的无色不可燃气体
|   Density = 1.486 g/cm³ (&minus;29.8 °C，液态)<br />5.5389 kg/m³ (0 °C，气态)<ref name="BGIA GESTIS">{{GESTIS|Name=Dichlordifluormethan |ZVG=26210 |CAS=75-71-8 |Datum=9.12.2007 }}</ref>
|   MeltingPt = &minus;157.7 °C (115.5 K)
|   BoilingPt = &minus;29.8 °C (243.3 K)
|   Solubility = 0.286 g/l at 20 °C
|   LogP = 2.16
|   VaporPressure = 568 kPa (20 °C)
|   HenryConstant = 0.0025 mol&thinsp;kg<sup>-1</sup>&thinsp;bar<sup>-1</sup>
  }}
| Section3 = {{Chembox Hazards
|   ExternalMSDS = [http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc00/icsc0048.htm ICSC 0048]
|   EUIndex = 对环境有害 ('''N''')
|   MainHazards = 消耗臭氧层
|   RPhrases = {{R59}}
|   SPhrases = {{S9}}, {{S23}}, {{S59}}
  }}
}}

'''二氟二氯甲烷'''（'''R-12'''），商品名'''[[氟利昂]]-12'''，分子式CF<sub>2</sub>Cl<sub>2</sub>，是一種[[氯氟烴]]無色氣體，常作為[[工作介质|冷媒]]或{{link-en|氣溶膠噴罐|Aerosol spray|氣溶膠推噴劑}}使用。

==性质==
无色几乎无臭的气体，高浓度时有类似[[醚]]的气味且有麻醉性。不可燃，无[[刺激性]]和[[腐蚀性]]。不溶于水，溶于[[乙醇]]和[[乙醚]]，造成的[[溫室效應]]約為同體積[[二氧化碳]]的25000倍。

==制备==
由[[四氯化碳]]与[[氟化氢]]在[[五氯化锑]]催化下进行作用，并控制[[回流_(實驗裝置)|回流]]冷凝温度为−5°C而制得。
:<math>\ CCl_4+2HF \ \xrightarrow [80^oC, \ 709.1kPa]{SbCl_5} \ CCl_2F_2+2HCl</math>

==用途==
二氟二氯甲烷用作[[致冷剂]]、[[灭火剂]]、氟化剂、喷射剂、[[杀虫剂]]和氟树脂的原料等。但因會破壞[[臭氧層]]，致冷劑用途已被[[1,1,1,2-四氟乙烷]]（R-134a）、[[2,3,3,3-四氟丙烯]]（HFO-1234yf）等較不破壞臭氧層的化學物質所取代。

==参考资料==
{{reflist}}

{{卤代甲烷}}
{{Authority control}}
[[Category:氯氟烃]]
[[Category:卤代甲烷]]
[[Category:氟化剂]]
[[Category:全卤化合物|甲]]