MMAN is an acronym for monomethylamine nitrate, it is also called methylamine nitrate. It is a powerful and stable primary explosive compound. Its stability makes it a better choice for a primary explosive and as a test of the independent chemist's skill. When used as a blasting cap it will probably require some other more sensitive material to help it along, but when it explodes it will detonate even insensitive explosives. The only problem with it is that it is a hygroscopic compound, so keep it very tightly sealed in storage. Another snag is the methylamine solution used, it is not a supermarket item now that drug dealers have made it a DEA watched chemical, it is easy to make though. A note on nitric acid: You can use any concentration of acid from 20% and up, it is the volume of acid that is required. I have given the volume for pure acid, adjust as needed for lesser solutions.
Place 250 mL of 33% methylamine solution in a 1000-mL beaker. Slowly add, with stirring, 385 mL of 100% nitric acid. It will be helpful to divide the acid into four equal portions of 96 mL each and use a salt-ice bath. The acid addition will generate substantial heat and may boil, wait until the solution cools a little before adding the next portion. It is not necessary to add concentrated nitric acid, a concentration as low as 20% will suffice. You must still add the equivalent of 385 mL of pure acid. Remember there is 1 mL of pure acid per 1% of solution in 100 mL. A 20% solution would require 1925 mL. After adding the acid, test the solution with pH paper, or litmus paper. The result must be near pH 7 if using the pH paper and be neutral if using litmus paper. If the solution is acidic add methylamine until pH 7 is reached. If the solution is basic add nitric acid until pH 7 is reached. Evaporate the liquid to precipitate the crystals of MMAN by heating until a slurry is reached, then use vacuum drying to remove the rest of the water. Because the MMAN is hygroscopic, it will be impossible to drive off all the water unless heated under vacuum or placed in a desiccator. Extreme care must be taken when heating an explosive IT CAN EXPLODE. MMAN is safe enough that it only burns when strongly heated. Use either a hotplate, steam bath, or oil bath to heat the explosive. If you have access to vacuum equipment use the vacuum drying method. You will need a graduated cylinder for measuring liquids, and a stirring rod or magnetic stirrer for mixing.
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