Circular 21 - Insecticides and Subsidiary Materials 53 
Two well known commercial products are 
Demotex, manufactured in America, and Eulan 
C. N. , a foreign product. 
For manufacturers and distributors 
see numbers 3, 4, 15, 33, 37, ^6, 70, 74, 
75, and 109 of list at end of this circular. 
NAPHTPU\LSN3 
Naphthalene is used extensively in 
preventing injury by and for killing such 
fabric pests as the various kinds of clothes 
moths, and carpet beetles which attack woolen 
fabrics used for raal<:ing uniforms, blankets, 
wool- and fur-lined helmets, boots, also furs, 
and various other items. The flakes are 
ordinarily used for this purpose and are 
about as effective as paradichlorobenzene. 
■.Vhen fabrics become saturated vvlth the 
fumes they kill the insects and prevent them 
from attacking the materials. Naphthalene 
is applied directly to the fabrics in enclosed 
containers at the rate of 2 to 4 pounds per 
100 cubic feet of space. It is also used to 
kill fleas in living quarters and in the 
preparation of certain louse powders. 
Chemically, naphthalene, C-jqKo, is a 
white, crystalline, flaky material and is 
the chief constituent o^ moth balls. It 
vaporizes very slov/ly and forms a noninflam- 
mable gas having a pungent, tarry odor. It 
is used in various industries such as in the 
manufacture of dyes, resins, and in disinfec- 
tants. 
