Accession Number:

AD0652850

Title:

INHALATION TOXICITY OF PYROLYSIS PRODUCTS OF MONOBROMOMONOCHLOROMETHANE (CB) AND MONOBROMOTRIFLUOROMETHANE (CBRF3)

Descriptive Note:

Final rept., Sep 1965-Jun 1966

Corporate Author:

AEROJET-GENERAL CORP DAYTON OH TOXIC HAZARD RESEARCH UNIT

Report Date:

1967-03-01

Pagination or Media Count:

33.0

Abstract:

The toxicities of the pyrolysis products of two fire extinguishant compounds, CH2ClBr and CBrF3, were investigated using albino rats and 14 day LC50 values were determined for single 15-minute exposures. Both fire extinguisher compounds, currently used by the USAF for aircraft fires, were pyrolyzed at 800C in a hydrogen-oxygen flame. The pyrolysis products of each compound were examined and the principle constituents were identified and quantitated. The determined LC50 value of 2300 ppm for pyrolyzed CBrF3 produced a hydrogen fluoride concentration of 2480 ppm consistent with the reported LC50 value for a single 15-minute exposure to this gas. Monobromomonochloromethane pyrolysis products were found to have a LC50 of 465 ppm as CH2ClBr under the experimental parameters tested. The toxic response producing this LC50 value appeared to result from a mixture of hydrogen chloride, hydrogen bromide, and bromine gases.

Subject Categories:

  • Toxicology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE