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Iodine test for stearic acid

  1. Oct 30, 2011 #1
    In my lab at college we were analysing various pharmaceutical excipients, stearic acid being one of them. We did an iodine value test on it. From what I've read, the iodine-value test is to determine the degree of unsaturation of a compound. Stearic acid is a saturated fatty acid so I don't understand how this test can be performed on it. It was a raw material sample we were analysing like you would do if you were a quality assurance analyst for a pharmaceutical company. What purpose could performing an iodine value test on a stearic acid raw material sample serve?
     
  2. jcsd
  3. Oct 30, 2011 #2

    Borek

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    Staff: Mentor

    Just guessing - if the result is anything but zero, you know you have unsaturated impurities.
     
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