The purpose of this article is to alert our peers on the danger faced by those who carry out experiments involving molten ammonium dinitramide (ADN). In recent experiments aiming at preparing submicron particles of this compound, a preliminary study of the sensitivity to impact of molten ADN was performed. These first tests have shown that the sensitivity threshold of molten ADN to impact is more than one order of magnitude lower that the one on solid ADN (<0.25 J vs. 4 J) and similar to the one of nitroglycerin (<0.25 J), making liquid ADN extremely hazardous to handle. Detonation tests, which were performed in strong steel sheaths open to one end, have shown that the initiation of the detonation and its subsequent propagation occur both in solid and liquid ADN charges, having a diameter of only 4 mm. The critical diameter of solid ADN which is between 25 and 40 mm according to literature, is therefore decreased by at least an order of magnitude when ADN is placed in strong metallic confinement. On the other hand, the detonation of liquid ADN produces stronger destructive effects than the detonation of solid ADN, meaning that the detonation mechanisms of this explosive are different in its two physical states. In conclusion, liquid ADN must be considered in practice as a more hazardous and powerful explosive than solid ADN. This raises the issue of all experiments in which ADN is likely to be formed in molten state.

中文翻译：

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熔融二氨基乙酰胺的危险特性

本文的目的是提醒我们的同行，那些从事涉及熔融二硝胺（ADN）的实验的人面临的危险。在旨在制备该化合物的亚微米颗粒的最新实验中，对熔融ADN的撞击敏感性进行了初步研究。这些最初的测试表明，熔融ADN对撞击的敏感性阈值比固态ADN的敏感性阈值（<0.25 J vs. 4 J）低一个数量级，并且与硝酸甘油的敏感性阈值（<0.25 J）相似，使液体ADN极其危险。在一端开口的结实的钢制护套中进行的爆震测试表明，爆震的开始及其随后的传播发生在直径仅为4 mm的固体和液体ADN装药中。因此，根据文献，当将ADN置于牢固的金属限制中时，固态ADN的临界直径在25到40 mm之间，至少减小了一个数量级。另一方面，液体ADN的爆炸比固体ADN的爆炸具有更强的破坏力，这意味着该炸药在两种物理状态下的爆炸机理不同。总之，在实践中必须将液态ADN视为比固态ADN更危险，更强大的爆炸物。这就提出了所有实验中ADN可能以熔融状态形成的问题。液体ADN的爆炸比固体ADN的爆炸具有更强的破坏力，这意味着该炸药在两种物理状态下的爆炸机理不同。总之，在实践中必须将液态ADN视为比固态ADN更危险，更强大的爆炸物。这就提出了所有实验中ADN可能以熔融状态形成的问题。液体ADN的爆炸比固体ADN的爆炸具有更强的破坏力，这意味着该炸药在两种物理状态下的爆炸机理不同。总之，在实践中必须将液态ADN视为比固态ADN更危险，更强大的爆炸物。这就提出了所有实验中ADN可能以熔融状态形成的问题。