Accession Number : AD0877678

Title :   Effect of Relative Humidity on the Penetrability and Sporicidal Activity of Formaldehyde,

Corporate Author : FORT DETRICK FREDERICK MD

Personal Author(s) : Hoffman, Robert K. ; Spiner, David R.

Report Date : NOV 1970

Pagination or Media Count : 17

Abstract : The effect of relative humidity (RH) on formaldehyde penetration through paper, glassine, and cotton was determined by the death rate of bacterial spores in glass tubes covered with these materials. The data show that paper is readily penetrated regardless of RH, but the RH greatly affects the penetration rate through glassine and cotton. The effect of RH on the penetrability of formaldehyde generated from formalin and paraformaldehyde was also compared. At low RH all three closures were penetrated more readily by formaldehyde from paraformaldehyde than from formalin, but at high RH no difference in the two was observed. The difference at low RH is probably primarily due to the condensation of the vaporized formalin. (Author)

Descriptors :   *FORMALDEHYDE), (*GERMICIDES, HUMIDITY, PENETRATION, VAPORS, STERILIZATION, BACTERIA, SPORES.

Subject Categories : Hygiene and Sanitation
      Medical Facilities, Equipment and Supplies

Distribution Statement : APPROVED FOR PUBLIC RELEASE