jETHYLIS chloridum. 
Ethyl Chloride. 
C 2 H 5 C1 
Ethyl Chloride is “ a haloid derivative, prepared by the action of 
hydrochloric acid gas upon absolute ethyl alcohol.” Also known as 
chelene or lcelene. 
Character. — “ Colorless, mobile, very volatile liquid, having a char- 
acteristic, rather agreeable odor and a burning taste.’' It boils at a 
temperature of 12.5° to 13^ C. 
Solubility. —Slightly- soluble in water, readily in alcohol. 
Purity. — “If 10 Cc. of ethyl chloride, while cold, be dissolved in 
alcohol, and a few drops of silver nitrate T. S. 
be added, 
no turbidity should be produced (absence of hydrochloric acid)." 
Although ethyl chloride is usually used as a local anaesthetic, it is 
contained in the following mixtures intended for general anaesthesia: 
Ansesthol 
Ethyl chloride 
• Chloroform 
Ether 
17 parts 
36 parts • ^ 
48 parts] wei S ht - 
Somnoform- 
Ethyl chloride 
Methyl chloride 
Ethyl bromide 
60 parts 
35 parts 
5 parts 
. b y 
weight. 
(Jour. Amer. Med. Assoc., April 22, 1905, p. 1303.) 
“ Ancesthol (Speier)” is a mixture of ethyl chloride and methy-1 
chloride for local anaesthesia. Anestyl and coryl are also mixtures of 
ethyd chloride and methy-l chloride. 
Caution. — Very inflammable; should not be used in proximity to a 
gas flame or fire. It should be preserved in hermetically- sealed glass 
tubes in a cool place. 
As a permanent opacity^ may- result when freezing mixtures come 
in contact with the cornea, Merz-Weigandt (Hirschberg's Festschrift, 
1905, p. 1ST) emphasizes the necessity- of caution when using ethy l 
chloride about the head. 
AMMONII SALICYLAS. 
Ammonium Salicylate. 
C 6 H 4 (OH)COONH 4 
Character. — “Colorless, lustrous, monoclinic prisms or plates, or 
a w-hite crystalline powder, odorless, and having at first a slightly 
saline, bitter taste, with a sweetish aftertaste. Permanent in dry air.” 
The concentrated aqueous solution reddens blue litmus. 
Solubility. — Very- soluble in water (0.9 part), slightly- less so in 
alcohol (2.3 parts). 
