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

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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1967
Accession Number
AD0652850

Entities

People

  • Charles C. Haun
  • David L. Geiger
  • Edmond H. Vernot
  • J. D. Macewen
  • Robert P. Geckler

Organizations

  • Aerojet Rocketdyne Holdings

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Analytical Chemistry
  • Analytical Chemistry Techniques
  • Biomedical Research
  • Body Weight
  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Fire Extinguishers
  • Halogen Compounds
  • Halogenated Hydrocarbons
  • Halogens
  • Hydrocarbons
  • Laboratory Animals
  • Mass Spectra
  • Materials
  • Phosgene

Fields of Study

  • Environmental science

Readers

  • Electrochemical Engineering/ Fuel Cell Technologies
  • Fire Suppression Systems Design.
  • Toxicology/Environmental Toxicology