Anticonvulsant.||Synonyms:|3-(Ethyl-d3)-3-methyl-2,5-pyrrolidinedione; 2-(Ethyl-d3)-2-methylsuccinimide; Atysmal-d3; Capitus-d3; Emeside-d3; Etosuximid-d3; H 940;-d3 Mesentol-d3; NSC 64013-d3; Simatin-d3; Succimal-d3; Succimitin-d3; Suxilep-d3; Suximal-d3||CAS No:|1189703-33-0|Unlabeled: 77-67-8||Molecular Formula:|C7H8D3NO2||Molecular Weight:|144.19||Purity:|≥98%||Appearance:|White to pale yellow solid||Melting Point:|42-44°C (lit)||Solubility:|Chloroform (Slightly), Methanol (Slightly)||Method for Determining Identity:|Proton NMR Spectroscopic and Mass Spectrometric analysis||TLC Conditions:|SiO2; Hexanes: Ethyl Acetate=7:3; Visualized with UV and KMnO4; Single Spot, Rf=0.50||Elemental Analysis:|Calculated: %C: 58.31, %N: 7.69, %N: 9.71||Normalized Intensity:|d0: 0.15%, d1: 0.24%, d2: 0.00%, d3: 99.61%||Storage and Stability:|May be stored at RT for short-term only. Long-term storage is recommended at 4ºC for 6 months after receipt.