xionoland
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Dark brown Propionyl Chloride?
A suposed 98% air sealed propionyl chloride is dark brown in color. Isn't that chemical suposed to be clear liquid? Maybe some of it have reacted with
moisture from air.
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Ozone
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The stuff I have made was 98+% and water-white. It also eats the caps off of scintillation vials. Butyryl chloride, ditto.
It may be photochemically reactive.
Cheers,
O3
-Anyone who never made a mistake never tried anything new.
--Albert Einstein
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woelen
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Propionyl chloride, even when some of it has reacted with water, still must be colorless. The products of reaction with water also are colorless. If
yours is dark brown, then I'm afraid that it is a load of crap, not suitable for any serious experiments. You might have some luck with distilling off
the compound from the dark brown crap.
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Arthur Dent
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Maybe it reacted somehow with the bottle cap or the lining of the cap, melted it and dissolved it, and further reaction discolored the Propionyl
Chloride? Unscrew the cap and see what shape it is in... If that's the case, then as woelen suggested, you might want to try distillation.
A few MSDS sheets suggest these properties:
Density: 1.06
Melting point: -94 ºC
Boiling point: 77-79 ºC
Robert
--- Art is making something out of nothing and selling it. - Frank Zappa ---
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DJF90
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It may be that his "air sealed" sample is actually an ampoule. The fact he can tell its a dark colour may hint that its a clear glass ampoule, as
opposed to an amber one which would exclude ultraviolet radiation from the sample (although it is possible to tell if something in an amber glass
vial/bottle is dark - so I'm just guessing). Try distilling it; don't forget a calcium chloride tube on your reciever adaptor to prevent the ingress
of moisture.
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mr.crow
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Maybe some sort of polymerization or condensation with the enol form. Sort of like the HVZ reaction
You could react it with sodium propionate to get propionic anhydride. That should be a lot better for long term storage.
Double, double toil and trouble; Fire burn, and caldron bubble
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