Spatter Shield One d the steps in the conversion of aniline into sulfanilamide is the quenching of excess chlorosulfonie acid subsequent to ehlorosulfonylation of acetanilide;' the reaction of this acid with water is vigorous, and spattering inevitably occurs. If the student covers the opening of an icefilled beaker with a n inverted powder funnel, uses an eyedropper or a Pasteur pipet to handle the CISOJH solution, and lowers the tip of the pipet through the neck of the funnel to transfer the acid onto the ice, the funnel acts as a screen to contain airborne particulate matter; spattered product can be recovered by scraping from the funnel surface.
'For example, see Adams, R., Johnson, J. R., and Wilcox, D. F., Jr., "Laboratory Experiments in Organic Chemistry," 6th ed., MacMillan Company, New York, 1970, p. 311. J. D. Wander The Ohio State University Columbus, Ohio 43210
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