This November, 1943 photograph was provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH). The image depicted an industrial chemist in the process of analyzing test tubes filled with solutions of TNT (trinitrotoluene), and Tetryl, which is an organic explosive compound that is potentially an irritant known to cause industrial dermatitis. The tests being performed induced color changes in the solutions, which were then compared, and the results recorded. Note that the scientist was not wearing a protective filtered breathing mask, goggles, or gloves while carrying out these experiments.
CDC/ Barbara Jenkins, NIOSH
December 1, 2012
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