Title: Butallylonal
CAS Registry Number: 1142-70-7
CAS Name: 5-(2-Bromo-2-propenyl)-5-(1-methylpropyl)-2,4,6(1H,3H,5H)pyrimidinetrione
Additional Names: 5-(2-bromoallyl)-5-sec-butylbarbituric acid; sonbutal
Molecular Formula: C11H15BrN2O3
Molecular Weight: 303.15
Percent Composition: C 43.58%, H 4.99%, Br 26.36%, N 9.24%, O 15.83%
Literature References: Prepn: US 1739662 (1929).
Properties: Crystals. Slightly bitter taste. mp 130-133°. Freely sol in alcohol, ether, alkaline solns. Practically insol in water (acid to litmus), petr ether, aliphatic hydrocarbons.
Melting point: mp 130-133°
Derivative Type: Sodium salt
CAS Registry Number: 3486-86-0
Additional Names: Sodium 5-(2-bromoallyl)-5-sec-butylbarbiturate
Molecular Formula: C11H14BrN2NaO3
Molecular Weight: 325.13
Percent Composition: C 40.64%, H 4.34%, Br 24.58%, N 8.62%, Na 7.07%, O 14.76%
Properties: Powder or crystals, bitter taste. Soluble in water, alcohol; slightly sol in ether, chloroform. A 10% aq soln (pH of about 9.5) is alkaline to litmus and phenolphthalein.
NOTE: This is a controlled substance (depressant): 21 CFR, 1308.13.
Therap-Cat: Sedative, hypnotic.
Keywords: Sedative/Hypnotic; Barbituric Acid Derivatives.
Status: This monograph has been retired and is no longer subject to revision or update.
Butamben Butamirate Butamisole Butanilicaine Butaperazine

Butallylonal structure.svg
Systematic (IUPAC) name
5-sec-Butyl-5-(beta-bromoallyl)barbituric acid
Clinical data
Legal status  ?
CAS number 1142-70-7
ATC code None
PubChem CID 14362
ChemSpider 13723 YesY
Chemical data
Formula C11H15BrN2O3 
Mol. mass 303.15 g/mol
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Butallylonal is a barbiturate derivative invented in the 1920s.[1] It has sedative properties, and was used primarily as an anaesthetic in veterinary medicine.[2] Butallylonal is considered similar in effects to pentobarbital but is longer in action, being considered an intermediate-acting barbiturate rather than short-acting.