21 
^THYLIS CHLOKIDUM. 
Etli^ 1 Chloride. 
C,H,C1 
Ethyl Chloride is a haloid derivative, prepared by the action of 
hydrochloric acid gas upon absolute ethyl alcohol.” Also known as 
chelene or helene. 
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. —Slight!}" 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. [Sa*so.] 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: 
{ Ethyl chloride 
Chloroform 
Ether 
17 parts] 
36 parts 
48 parts) 
by 
weight. 
lEthyl chloride 
^omno/ormi Methyl chloride 
Ethyl bromide 
60 parts] 
35 parts i ^ 
5 parts|"’«‘S'’‘- 
(Jour. Amer. Med. Assoc., April 22, 1905, p. 1303.) 
^^Anaesthol (Speier)” is a mixture of ethyl chloride and methyl 
chloride for local anaesthesia. Anestyl and coryl are also mixtures of 
ethyl chloride and methyl 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. 187) emphasizes the necessity of caution when using ethyl 
chloride about the head. 
AMMONII SALICYLAS. 
Ainmoiiiuni Salicylate. 
C6H,(0H)C00NH, 
Character. — “Colorless, lustrous, monoclinic prisms or plates, or 
a white 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). 
