Organic Chemistry Lab

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Extraction & Evaporation. Separating the Components of "Panacetin, and the Recrystallization & Melting Point Measurement. Identifying a Component of "Panacetin."

This laboratory experiment was a combination of two separate experiments as stated in the above title. The introduction has been split into 2 separate components to briefly give some background on each procedure. 1

This particular lab is set up with quite a different scenario then that of the last one. A roving agent for the ASP Corporation has recently Panacetin, which is an analgesic drug. The agent looked carefully at the bottle and it said that they were produced in the United States, but he later noticed a few discrepancies on the bottle and even the tablets themselves which causes a concern that they may be counterfeit.

The label on the bottle posted the ingredients per tablet as aspirin (200 mg), acetaminophen (250 mg), and sucrose (50 mg). Sucrose is used so that children have an easier time ingesting the tablets. The basis of this lab was to see whether the tablets are as pure as they read on the bottle or whether there is another component that is a chemical relative of acetaminophen, either acetanilide or phenacetin, as well as to find out the percent composition of aspirin, sucrose, and the unknown makeup in the tablet. Both acetanilide and phenacetin fight pain just as effectively as acetaminophen, but both are banned in the United States because of having amounts of toxicity that forbids them from being sold in this country. 2

The purpose of this part of experiment is to purify and identify the unknown component of Panacetin from the first experiment. Separation techniques are never perfect, so there should be at least some impurities expected within the substance that has been separated from a mixture. Therefore, some kind of purification procedure is needed to extract them. Solids can be purified in a number of ways such as, chromatography,...
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