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Axt
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Registered: 28-1-2003
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You are correct about bi/carbonate being present, it fizzed under a drop of HCl.
The solution turned opaque milky with no noticeable precipitate settling out, but I stopped at that because I didn't have much to waste. Zinc
carbonate being practically insoluble it does explain that.
Hydrazine reduces silver nitrate on contact, immediate browning and fizzing. I assume carbohydrazide would form a carbonate too, this seems most
likely based on the silver complex being at least transiently stable. I dried the precipitate and there were a couple bits less black than pitch black
that decomposed energetically when ignited.
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Microtek
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IIRC, I experimented with synthesizing carbohydrazide myself before deciding that buying some was the way to go, possibly because it was annoying to
isolate. I do think that your urazine is probably fine since the low solubility makes it easy to purify.
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