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Old Dec 26th 2017, 09:47 AM   #1
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Glycerin + sulphuric acid or perchloric acid = ???

Hi there,

I'm working on my thesis, but I have some questions and hoped maybe someone could help me out.

I have been mixing glycerin with sulphuric acid to obtain solutions in the range of 0.1M up till 1M with mass fractions of glycerol varying from 0.5 to 0.9 but somehow it colors a little bit pink over time. For the 0.1M solution it takes a while, but the 1M solution immediately turns a little bit pink. Does anybody know what is being produced in this way?

Besides that I've tried exactly the same with perchloric acid (65 wt%) but than the solutions turned a little bit more orange or yellow. Still indicating some kind of reaction going on...

Hope someone can help me here!!

Kind regards,

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