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丙酸

中文名稱:丙酸  
拼音:bing suan   
英文名稱: propionic acid ;propanoic acid
CAS No.:79-09-4
分子式:C2H5COOH   
分子量:74.08
  
理化特性: 
主要成分:含量≥99%?! ?br /> 外觀與性狀:無色液體,有刺激性氣味?! ?br /> 熔點(℃): -22   
沸點(℃):140.7   
相對密度(水=1): 0.99   
相對蒸氣密度(空氣=1): 2.56   
飽和蒸氣壓(kPa):1.33(39.7℃)   
燃燒熱(kJ/mol): 1525.8   
臨界溫度(℃): 339   
臨界壓力(MPa): 5.37   
閃點(℃): 52   
引燃溫度(℃): 465   
爆炸上限%(V/V): 12.1   
爆炸下限%(V/V): 2.9   

溶解性:溶于水、乙醇、乙醚等,有毒,高濃度接觸時或引起皮膚、眼粘膜表面的局部損傷?! ?br /> 補充:分子中含有3個碳原子的飽和羧酸。分子式CH3CH2COOH??煽醋魇羌谆宜?。干餾木材制得的木醋酸(或稱焦木酸)中和各種發酵產物中均含少量丙酸。具有刺激性氣味的無色液體。熔點-20.8℃,沸點141℃,密度0.9930克/厘米3(20℃)。易溶于水、乙醇、乙醚和氯仿中。丙酸的化學性質與乙酸相似,可生成鹽、酯、酰鹵、酰胺和酸酐。在光照下,氯氣與丙酸反應。

丙酸-用途 主要用途:用作酯化劑、硝酸纖維素的溶劑、增塑劑、化學試劑和配制食品原料


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