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Molecular formula : HOOCCH2CH (C2H5) COOH
CAS :
nature : also known as ethyl succinate, butane-1 ,2-dicarboxylic acid. A D - (d-), L - (l-), the racemate (dl-) optical isomers. (1) D-body : mold, melting point 96%, relative density 1.0017; Polarimetry +15.4 °; Anhydride derivatives, 32.5 ° C melting point, optical rotation +0.3 °. (2) L-body : crystallization temperature of 96 ° C; The relative density 1.0018; Polarimetry -15.4 ° (acetone); Its Derivatives : two methyl ester, the boiling point of 91 ~ 94 ° C (1.733kPa), the relative density of 1.053 , polarimetry -14.89 °; anhydride, temperature 32.5 ° C, 0.1 ° degree rotation. (3) BNDADA : needle crystallization temperature to 100% heat of combustion (Carse added) 671.9kcal, pKl (25 ° C) 8.5 × 10-5, pK2 (100 ° C) 1.3 × 10-6, distillation gains anhydride. C Ethyl cyanide and formaldehyde condensation system enough unsaturated acid, and potassium cyanide again after treatment with hydrochloric acid from the system. Raw materials used for organic synthesis. Its Derivatives : two methyl, boiling point, 202 ~ 205 ° C; Two Ethyl, the boiling point of 223 ~ 226 ° C, anhydride, fluid density d341.165; Two amide, and the melting point of 214 ° C. 1cal = 4.18J.
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