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Clinical data
SynonymsCrotylbarbital, Crotarbital, Mepertan, Kalipnon, Barotal
CAS Number
PubChem CID
E number{{#property:P628}}
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Chemical and physical data
Molar mass210.23 g/mol

Crotylbarbital (Crotarbital, Mepertan, Kalipnon, Barotal) is a barbiturate derivative invented in the 1960s.[1] It has sedative and hypnotic effects,[2] and was used for the treatment of insomnia until it was replaced by newer alternative drugs with less side effects and lower risk of overdose.


  1. Preussler M. Contribution on the microchemical test for crotylbarbital. Pharmazeutische Zentralhalle fur Deutschland. 1964;103:409-11. (German)
  2. Walther T, Meyer FP, Puchta K, Walther H. Effect of an acute dose of crotylbarbital on reaction time and attention testing in healthy human subjects. International Journal of Clinical Pharmacology, Therapy and Toxicology. 1983 Jun;21(6):306-10.