This section is from the book "Materia Medica Pharmacy, Pharmacology And Therapeutics", by W. Hale White. Also available from Amazon: Materia Medica Pharmacy, Pharmacology And Therapeutics..
Dry Chlorine Gas is passed through Aldehyde. Butyl-chloral (C4H6Cl3O) is formed. It is separated by fractional distillation, and water is added.
Dose, 5 to 20 gr.; .30 to 1.20 gm.
The action of this drug is exactly similar to that of chloral, but butyl-chloral hydrate is less certain in its effects. It is said to be less depressant to the heart, but this is doubtful. It has a specific action in relieving neuralgia of the fifth nerve.