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CAS Number
PubChem CID
ECHA InfoCard 100.013.575 Edit this at Wikidata
Chemical and physical data
Formula C12H17BrN2O3
Molar mass 317.179 g/mol
3D model (JSmol)
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Sigmodal (Rectidon) is a barbiturate derivative. It has sedative, hypnotic and anticonvulsant properties, and was used in surgical anaesthesia in the 1950s, and frequently appeared in drug mixtures in the 60's. [1] [2]

It was never widely used compared to better known barbiturates such as thiopental, and has now been replaced by newer drugs with a better safety profile.


  1. ^ Meder, F. (1952). "Our experiences with Rectidon basal anesthesia". Zentralblatt für Gynäkologie (in German). 74 (48): 1895–1896. PMID 13050081. 
  2. ^ Frommolt, G. (1952). "On Rectidon basis narcosis". Die Medizinische (in German). 20 (47): 1503–1504. PMID 13024592.