Circular 21 - Insecticides and Subsidiary Plater ials 30 
Ethylene dichloride in admixture with 
carbon tetrachloride can be purchased in 55 
gallon drums for about 6^ to 7 cents per pound. 
In smaller quantities it can be purchased for 
about 75 cents per ppllon, 
?or manufacturers and distributors see 
numbers lU, 16, 21, 36, 37, 68, and 116 of 
list at end of this circular. 
ETHYLSI\^ OXIDE 
Ethylene oxide, in admixture with 
carbon dioxide, may be used to fumigate small 
quantities of cured meats or cheeses in atmos- 
pheric vaults to control mites, ham beetles, 
and skippers that infest these commodities. 
It is also used to control the various pests 
affecting furs and fabrics in storage rooms. 
It does not injure fabrics or furs or leave 
any obnoxious odor or poisonous f'^^^idue on 
foodstuff. 
Ethylene oxide (C2H/O) is a colorless 
liquid which boils at 51.8^ Fo The concen- 
trated vapor of this material is inflammable. 
It is a product of the natural gas chemical 
industry. The material has been used in rather 
large quantities in atmospheric vault and 
vacuum fumigation. Although ethylene oxide 
may be used alone for some purposes, it is 
safer to use it in admixtures with carbon 
dioxide to make it non inflammable. See 
Circular No. 22. 
Caution : As ordinarily used the danger 
from breathing the vapors of ethylene oxide 
are not considered to be great. However, 
precautions taken against breathing the vapors 
should be the same as with other poisonous gases 
