Circular 21 - Insecticides and Subsidiary Materials 18 
larvae are carefully picked out after the 
chloroform has been applied, preferably as a 
spray. Chloroform is also used in making 
killing tubes for collecting adult mosquitoes 
for identification purposes. 
Chloroform, CHClo, is a heavy, clear, 
colorless, sweet-tasting liquid. Although 
noninflammable, it is very volatile and has a 
characteristic odor. It is not very soluble 
in v;ater but mixes readily with most other 
solvents, and is employed industrially as a 
general solvent . 
Caution : Keep away from flame when 
using. Even though noninflammable, the vapors 
are decomposed by fire and there is involved 
very irritating and possibly poisonous gas. 
Care should be used to avoid unnecessary 
inhalation. 
Chloroform is marketed in 50 to o50 
pound drums at a cost of 30 to 33 cents per 
pound and is available locally in smaller 
containers at relatively higher prices. 
Available on contract: See Class 51, 
General Schedule of Supplies, Procurement 
Division, Treac^ury Department. 
CIILOROPICRIN 
Chloropicrin may be used to delouse 
clothing in a tight container and will kill 
both the lice and their eggs. It may also be 
employed as a fumigant for large enclosures, 
for the treatment of grain in bins and other 
bulk commodities in vaults. 
