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Effect of formaldehyde liberation from formalin mixed with a tablet of bleaching powder on disinfection of chicken houses and hatching eggs



Effect of formaldehyde liberation from formalin mixed with a tablet of bleaching powder on disinfection of chicken houses and hatching eggs



Japanese Poultry Science 27(4): 329-333



A tablet of bleaching powder was used for liberation of formaldehyde from formalin instead of potassium permanganate. Atmospheric formaldehyde concentration liberated from formalin mixed with the tablet was the same degree as that from formalin mixed with potassium permanganate. Using the tablet, gas liberated gently and no overflow of the mixture from container just after mixing was observed. When the tablet was smashed to pieces as a size of red bean, gas liberated quickly and severely as in a case of potassium permanganate. Chloride was also liberated from the tablets. No manganese was detected in residue after gas liberation mixed with the tablet. Concentration of copper, zinc, iron and chromium in the residue after gas liberation were the same degree as those in the case of potassium permanganate. Satisfactory degree of disinfection of chicken houses and hatching eggs was obtained by fumigation for 24 hours for the house and for 20 minutes for the eggs when gas was liberated from 40 ml of formalin mixed with 20 g of bleaching powder (one tablet) per m3, respectively.

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Accession: 002082570

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