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Nitrilotrimetaphosphoric acid

Nitrilotrimetaphosphoric acid is said to be formed by heating crude imidodiphosphoric acid to 290°-300° C., washing out ammonium chloride, dissolving the residue in ammonia, acidifying and filtering off the white precipitate. The solution contained this acid,



which yielded a crystalline sodium salt.

Amido-, Imido- and Nitrilo-thiophosphoric Acids

These compounds are made by the application of a few general methods:—

  1. By the action of ammonia on thiophosphoryl halides.
  2. By the action of ammonia on sulphides of phosphorus.
  3. By heating ammonium chloride with sulphides of phosphorus.
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