explodes at 165 °C
Nitrosoguanidine is technically called N-methyl-N'-nitro-N-nitrosoguanidine, other names include MNNG; N-methyl-N-nitroso-N'-nitroguanidine; N'-nitro-N-nitroso-N-methylguanidine; 1-methyl-3-nitro-1-nitrosoguanidine; methylnitronitrosoguanidine; N-nitroso-N-methylnitroguanidine; 1-methyl-1-nitroso-N-methylguanidine; 1-nitro-N-nitroso-N-methylguanidine; MNG; and methyl-N'-nitro-N-nitrosoguanidine. Nitrosoguanidine is a yellow, crystalline powder, it is a primary explosive that detonates producing little heat and no flash. Although this is a sensitive explosive, exploding from shock, friction, and elevated temperatures, it does not have powerful explosive properties and can be stored indefinitely if dry in a sealed bottle. This compound will slowly decompose in the presence of water and will explode on contact with sulfuric acid. I have instructions concerning a demonstration of its flashlessness in a darkened room involving placing 0.5 g on the back of the left hand. A match is lit and blown out, the heated match stick is touched to the powder and it explodes. Suffice to say DO NOT try this. The only after affects are a rash and peeling of the skin if you want to know...
|ammonium chloride||800-mL beaker|
Prepare a mixture of 21 g of nitroguanidine, 11 g of ammonium chloride, 18 g of zinc dust, and 250 mL of water in an 800-mL beaker. Cool this mixture in a salt-ice bath and keep the temperature between 20-25 °C while stirring with a magnetic stirrer. After 2 hours of stirring the gray color of the zinc should have disappeared and the mixture should now be yellowish, there should be no crystals floating around as well. Keep stirring a while longer if not. Next, cool the mixture to 0 °C or lower with the salt-ice bath. Filter the mixture to collect the nitrosoguanidine, discard the filtrate. The yellow residue of nitrosoguanidine will contain some zinc oxide or hydroxide and basic zinc chloride. The residue must be extracted with 4 successive portions of 250 mL of water heated to 65 °C. Combine the extracts and allow them to stand at 0 °C for 12-24 hours, nitrosoguanidine will precipitate out of the solution. Filter to collect the crystals, rinse them with water, and dry at 40 °C. Yield is about 8.0-9.2 g or 45-52% of the theoretical yield. You will need a graduated cylinder for measuring liquids, and a thermometer to monitor the temperature.
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