||Inhalation toxicology of red and violet mixtures. : Chamber concentration and particle size distribution report /
Higuchi, M. A. ;
Davies, D. W.
||Health Effects Research Lab., Research Triangle Park, NC. Environmental Toxicology Div. ;ManTech Environmental Technology, Inc., Research Triangle Park, NC.;Army Medical Research and Development Command, Fort Detrick, MD.
|| U.S. Environmental Protection Agency, Office of Research and Development, Atmospheric Research and Exposure Assessment Laboratory,
Air pollution effects(Animals) ;
Indoor air pollutants ;
Smoke munitions ;
Chemical analysis ;
Particle size ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||39 pages ; 28 cm
An inhalation exposure facility was developed at the U.S. EPA, RTP, NC to conduct inhalation exposures of rodents and guinea pigs to dye mixtures used by the U.S. Army in the manufacture of smoke munitions. Initially, an evaluation of the prototype chamber aerosol homogeneity was conducted to determine the uniformity and reproducibility of the concentration and particle size of dye aerosol throughout the breathing zone of the test animals (Davies, et al.). The three dyes, DR11, SR1, and DB3, were chemically analyzed for purity and optically examined for size and shape. All pure dyes appeared to be stable at room temperature except DB3, which decomposes if not stored at 4 C. The particle size ranges varied for each pure dye and structures were either amorphous (azo dye) or crystalline (anthraquinone dyes). The bulk red and violet dye mixtures were analyzed for composition. The chemical analysis of the relative composition of each dye mixture, collected by cascade impactor sampling, revealed fractionation of the mixtures into component dyes.
EPA/600/9-91/003. "July 1991." Microfiche.