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sargent1015
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sad.gif posted on 24-12-2012 at 08:29
Weird Vanillin Problems

So I'm trying to extract vanillin with dichloromethane, however, when I do this I get an organic layer that is very cloudy and almost sludge-like and brown in color.

The ingredients say that there is only water, caramel color, vanillin, and ethyl vanillin.

So what is causing a precipitate in my organic layer? :(



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Hexavalent
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[*] posted on 24-12-2012 at 08:34


Are you sure that it is not just suspended water, or an emulsion?

Unless you are doing it for the experience, why not just buy vanillin online?



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sargent1015
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[*] posted on 24-12-2012 at 08:36


Just the experience and the overall cheapness of vanillin (79 cents for a bottle!)

I will have to check, but why should DCM have an emulsion at all? it is not at all soluble in water.



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kavu
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[*] posted on 24-12-2012 at 08:45


It is nothing unusual, try adding brine and/or swirling.
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sargent1015
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[*] posted on 24-12-2012 at 08:46


I tried brine which didn't do anything :/ I then tried just letting it sit for some time to no prevail



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[*] posted on 24-12-2012 at 08:49


Have you tried using any other solvents, such as EtOAc or PhMe?



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[*] posted on 24-12-2012 at 09:03


I'll give ethyl acetate a try, but I am away from my lab on holiday, so I update you in a week.



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