siegfried
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Guanidine Perchlorate
There has been some discussion about the solubility of this chemical. I have made this using Guanidine Carbonate and 70% Perchloric Acid: Add 194 ml
of the acid to 200g of 99% guanidine carbonate in 500 ml of water warmed on a hot plate. Add the acid slowly with heating and stirring until all of
the carbonate has dissolved. Add additional acid, if necessary, until solution has a pH of 4 or 5 but no lower. Guanidine perchlorate, about 320g,
will settle out upon cooling in a freezer. Filter and dry solid in air. Store in a glass bottle and protect from heat. It is not very sensitive to
either friction or impact and will not light but can be detonated with lead or thallium azide or confined magnesium and perchlorate flash powder.
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woelen
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Wow, you made a lot of this chemical. I just received some guanidinium carbonate and I'll try to do your experiment on a smaller scale (e.g. 2 grams
of solid with appr. 2 ml of 60% HClO4). Isn't it more safe to keep pH a little higher (using a small excess amount of the carbonate), to assure that
no free HClO4 remains in the solid? I can also imagine that the presence of a tiny amount of HClO4 makes the solid more hygroscopic.
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siegfried
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The solution should not be alkaline and a pH of 4 or 5 will produce nice safe crystals. This substance is not hygroscopic. I have 500g in a glass
bottle for over 10 years and the stuff is still good. It does have explosive powers but must be detonated. It will not catch fire from a fuse or a
match.
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woelen
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OK, I will try making it at slightly acidic pH and try to experiment with some of its properties.
I also have aminoguanidine bicarbonate and I'll also try this with HClO4 on a small scale. The aminoguanidine has an extra NH2 attached to one of the
NH-groups of the guanidine and hence can be regarded as a derivative of hydrazine and I can imagine that the perchlorate of this compound is more
energetic.
Guanidine salts are not easily reduced (I tried with aqueous acidic solutions of K2Cr2O7), but a solution of the aminoguanidine salt instantly reduces
an acidic solution of K2Cr2O7.
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