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}} Dichloroacetylene (DCA) is an oily pyrophoric〔 liquid chemical compound with the chemical formula C2Cl2. Its odor is sweet and "disagreeable".〔 The compound is volatile at standard temperature and pressure and explodes on contact with air.〔 It is a toxic compound. It displays nephrotoxic effects to rats, but not to humans. It can be made from the compound trichloroethylene. Dichloroacetylene is not soluble in water. == Properties == Dichloroacetylene has a melting point of -66° Celsius (-86.8° Fahrenheit). It explodes upon reaching its boiling point of 33° Celsius (91.4° Fahrenheit). The compound dissolves in ethanol, diethyl ether, and acetone.〔 However, it is insoluble in water.〔 Dichloroacetylene can explode when heated or upon contact with air. It also engages in vigorous reaction with materials that are oxidizers.〔 It also engages in violent reactions with acids.〔 Dichloroacetylene is an oil at standard temperature and pressure.〔 The chemical has a density of 1.2 times that of water while in its liquid state and 3.3 times that of air while in its gaseous state. Dichloroacetylene can detonate if it is set on fire in an enclosed space.〔 It can also burn in the presence of chlorine to produce phosgene. While dichloroacetylene is an unstable chemical, its stability can be increased by the presence of large amounts of trichloroethylene. A mixture of dichloroacetylene with ether forms an azeotrope. This azeotrope has a boiling point of 32° Celsius. Additionally, when dichloroacetylene is mixed with ether, the likelihood of it exploding is reduced. One of the reasons for this is that the ether prevents oxygen in the atmosphere from reaching the dichloroacetylene and causing it to explode.〔 Unlike the related fluorinated acetylenes, dichloroacetylene does not easily engage in thermal polymerization in either its gas phase or its condensed phase. Despite this, two patents have claimed that it is possible to polymerize dichloroacetylene. Using molybdenum pentachloride to polymerize dichloroacetylene has been investigated. It can be polymerized in certain circumstances, and its polymer is known as polydichloroacetylene. Polydichloroacetylene is white in color.〔 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「Dichloroacetylene」の詳細全文を読む スポンサード リンク
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