- 11 - 
Solutions of chlordane are easily prepared as it is readily soluble 
in the common organic solvents. It is miscible in all proportions with 
kerosene. 
Emulsions containing chlordane can he formulated with or without a 
solvent (Mail, 311 . 312 ). This is because chlordane is a liquid. The 
addition of small amounts of oil-soluble emulsifiers to oil solutions of 
chlordane makes emulsion concentrates which may be added to any desired 
amount of water. Also chlordane may be emulsified directly in water by 
the addition of a soluble emulsifier; however, in this case higher per- 
centages of emulsifier must be used in order to maintain the same cream 
separation rate as that shown by aqueous emulsions made from oil-contain- 
ing concentrates. 
Twenty-two emulsifiers suitable for emulsifying a kerosene solution 
of chlordane in water are listed by Lidov e_t aj„. ( 298 ) . An emulsifiable 
concentrate that produces a moderately stable emulsion is made by dis- 
solving 1 pound of chlordane and 5 ounces of Atlox 1045 A (polyoxy- 
ethylene sorbitol oleate-laurate) in sufficient kerosene to make 1 quart. 
When added to water to make a 2-percent wt./wt. emulsion of chlordane, 
the resulting emulsion will show approximately two percent cream layer 
after standing 2k hours. 
Chlordane dusts are prepared by first formulating a 50-percent by 
weight chlordane dust concentrate and then diluting this to the desired 
concentration. In preparing the dust concentrate, an absorbent type 
carrier such as diatomaceous earth should be used, and the impregnation 
process is carried out in a ribbon type blender. A weighed quantity of 
the absorbent carrier is placed in the blender, and an equal weight of 
the insect toxicant (heated to approximately 150° !.) is sprayed by 
means of air pressure through an orifice directly on the agitated carrier. 
The spraying orifice should be designed so that a finely atomized mist 
will be emitted which will cover a comparatively large surface of the 
carrier, and it should be placed approximately 12-14 inches above the 
surface of the carrier. If the orifice is at a greater distance from 
the carrier, the emitted droplets which cool on emission will become too 
viscous for efficient blending. In addition, if the effective spraying 
area is too narrow, the droplets will coalesce, and they will not blend 
satisfactorily with the carrier. The 50-percent dust concentrate is 
then run through a hammer or attrition mill for additional blending. A 
non-absorbent type of diluent or filler such as pyrophyllite is used to 
cut back the dust concentrate to the desired strength. The dustB finding 
the most universal application are those containing 5 percent and 10 
percent by weight of chlordane. Chemicals having an alkaline reaction 
should not be used with chlordane because such materials can cause de- 
hydrohalogenation of the insect toxicant. 
lettable powder - The manufacturing process for this product is the 
same as that used in preparing the 50-percent by weight dust concentrate. 
Aerosols - In experimental studies a liquefied gas aerosol formula 
(G-556) containing k percent chlordane, 5 percent DDT, 5 percent piperonyl 
