Imidodiphosphoric acid tetramide

The checker reports that the melting-point determination, run by inserting a capillary tube into a hot bath, gave a liquid at 170° which evolved a gas. X-ray diffraction data showed the absence of imidodiphosphoric acid tetramide, (NH2)2P(0)—NH—P(0)(NH,)s. f The University, Munich, Germany, t Monsanto Chemical Co., Dayton, Ohio. 

Imidodiphosphoric acid tetramide, formation of, from phosphoryl triamide, 6 110, llln. Iodination apparatus, for preparation of chromium(III) iodide, 6 128... 

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