Kashmeer
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Registered: 9-12-2016
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Iodine tincture goes colourless/white?
Hi guys,
I noticed when I mix iodine tincture (iodine and potassium iodide in 90% ethanol) with some cream (main ingredients list parabens, petroleum jelly and
cetearyl alcohol) and zinc oxide, the cream goes from brown (tincture colour) to white after a few hours.
Any ideas where is the iodine escaping to?!
When tested for free iodine, the cream doesn't stain starchy material blue, so I am thinking iodine is not available any more?
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aga
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The iodine isn't escaping, it's just reacting with the 'cream'.
Depending on what ion is produced, it can even become completely colourless.
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Tsjerk
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My guess is that your iodine is reacting with unsaturated carbon species, so indeed the iodine is not available anymore and won't work anti-microbial
anymore.
This reaction is actually used to determine the amount of unsaturated bonds in a compound.
[Edited on 9-12-2016 by Tsjerk]
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MrHomeScientist
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Just like it's not a good idea to mix bleach and ammonia hoping to make "super cleaner", it's probably not a good idea to mix medicines to make "super
meds".
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Bert
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Thread Moved
12-12-2016 at 09:40 |
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