Value and Use of Volatile Nitriles for Household Fumigation1

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Abstract
Trichloroacetonitrile (Cl3CCN) and a 50-50 mixture of Cl3CCN and acrylonitrile (CH2CHCN) were tested for use in household fumigation. Both are highly toxic to insects but not highly dangerous to warm-blooded animals. Tests in a fumigation chamber demonstrated that Cl3CCN and the 50-50 mixture are more effective at 80[degree] than at 60[degree] F and that moist conditions prolong the required aeration period several hrs. It was found possible to fumigate a house with Cl3CCN during the day, ventilate for a few hrs. and admit the occupants the same night. Since it is a lacrymator, there is practically no danger from its use because persons cannot tolerate fatal cones. In tight buildings, a dose of 2 lb. per 1000 cu. ft. for 6 hrs., or 1.5 lb. for 12 hrs., should be adequate for all insects. The 50-50 mixture may be used for house fumigations similarly to Cl3CCN using slightly higher concs. or longer exposures.

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