vibbzlab
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Anthranilic Acid crystals turn dark. Why?
I had made some Anthranilic Acid crystals as part of my organic chemistry research. initially it was pure white after recrystallisation. But later it
turned brown. Why does this color change occur?
Amateur chemist. Doctor by profession
Have a small cute home chemistry lab.
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DraconicAcid
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It oxidizes in air.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Amos
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Every aniline derivative does this. The oxidized impurity is very potent in color and just a miniscule amount will discolor the whole batch, and thus
a dark color doesn't really mean anything about the purity of your anthranilic acid. It's good to use still. In the future try to look around on the
forums first rather than starting a new thread; I know we've had this same conversation on the board multiple times in the last couple of years.
[Edited on 2-13-2022 by Amos]
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draculic acid69
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Look for other recent threads on anthranillic acid. One uses a soxelt extractor and heptane to purify it instead of water and it came out sparkly
white. It seems that as soon as water is used for recrystallisation it goes brown. Try making it again and don't recrystallize in water.
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Texium
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Thread Moved
17-3-2022 at 06:11 |
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