• the degree of sensitisation depends on the oxidizer (sensitive to friction and impact with potassium chlorate, friction with potassium perchlorate, impact with ammonium perchlorate, and insensitive to either with potassium nitrate). (wikipedia.org)
  • Though early thermal weapons , such as Greek fire , have existed since ancient times, the first widely used explosive in warfare and mining was black powder , invented in 9th century China. (infogalactic.com)
  • The first useful explosive stronger than black powder was nitroglycerin , developed in 1847. (infogalactic.com)
  • TNP nitronates formed under these conditions are more unstable than the picrates in what they turn back after standing a while in neutral media (return to the yellow color). (power-labs.com)
  • Many pyrotechnic compositions - especially involving aluminium and perchlorates - are often highly sensitive to friction, impact, and static electricity. (wikipedia.org)
  • Sensitive materials that can be initiated by a relatively small amount of heat or pressure are primary explosives and materials that are relatively insensitive are secondary or tertiary explosives . (infogalactic.com)
  • It is widely known that Picric Acid should not be allowed to contact metals or their salts due to the danger of formation of metal picrates. (power-labs.com)
  • If there are mineral deposits where large masses of native metal (usually copper) are present in the ground, using explosives to "liberate" the ore typically doesn't work well. (infogalactic.com)
  • Metal picrates are salts of Picric Acid formed by the addition of the metal to the 2,4,6TriNitroPhenol ring at the first hydroxide, as seen on the example to the left (KO-C 6 H 2 (NO 2 ) 3 or KC 6 H 2 N 3 O 7 ). (power-labs.com)
  • Their explosive strength is lower than Picric Acid's own (between 48 and 70% depending on the particular salt), but their sensitivity is much greater, increasing with the weight of the particular metal ion used. (power-labs.com)
  • For curiosity's sake experiments were performed on the synthesis of a few metal picrates and they were tested as to their properties. (power-labs.com)
  • Below, the synthesis of a small potassium Picrate batch is outlined for informational purposes only. (power-labs.com)
  • [1] The increased availability of chemicals has allowed the construction of improvised explosive devices . (infogalactic.com)
  • In turn, these have largely been replaced by more powerful explosives such as C-4 and PETN . (infogalactic.com)
  • the degree of sensitisation depends on the oxidizer (sensitive to friction and impact with potassium chlorate, friction with potassium perchlorate, impact with ammonium perchlorate, and insensitive to either with potassium nitrate). (wikipedia.org)
  • I am not experienced in making energetics except for black gunpowder and nitrocellulose, both of which I've made a few times with great success (but no more than 10 grams of powder and 2 cotton balls at a time), and I wanted to try my hand at making small quantities of the following: RDX, ETN, Picric acid, Ammonium Picrate, Nickel Hydrazine Nitrate, and (possibly) DDNP. (sciencemadness.org)