176 PROCEEDINGS OF THE AMERICAN ACADEMY. 



The substance is readily soluble in water, and in organic solvents 

 with the exception of benzene and ligroine. It crystallizes from acetic 

 acid in transparent quadratic pyramids with basal planes. The sub- 

 stance has a strong acid smell, and gives both primary and secondary 

 salts, which are colored yellow. An aqueous solution of the acid gives 

 with ferric chloride an intense blood-red coloration. 



Primary Silver Salt, CsHgNaOsAg. — This salt separates out slowly 

 in yellow flat prisms on addition of silver nitrate (one molecule) to a 

 concentrated aqueous solution of the acid. The filtrate gives, on long 

 standing, a brownish red precipitate. 



0.1948 gram substance, dried over H2SO4 in a vacuum, gave 0.1172 

 gram AgCl. 



Theory for CsH^NjOgAg. Found. 



Ag 45.76 45.29 



Secondary Potassium Salt, C3HN303K2> HaO. — This salt is obtained 

 quantitatively on adding an alcoholic solution of the acid to an alco- 

 holic solution of potassic hydrate (two molecules). It separates out 

 as a yellow crystalline powder, which, after being well washed with 

 alcohol and dried over sulphuric acid in a vacuum, was analyzed. 



0.2038 gram substance gave 0.1596 gram K0SO4. 



Theory for C3HN3O3K2H2O. Found. 



K 34.98 ' ' 35.11 



Behavior of the Acid towards Ammonia. — On adding concentrated 

 ammonia solution to an aqueous solution of cyanisonitrosoacethydrox- 

 amic acid, the secondary ammonium salt separates out as a yellow 

 amorphous powder, identical with the salt obtained directly from 

 formylchloridoxime and ammonia. If, however, much ammonia solu- 

 tion is used, a yellow solution results, in which, after some standing, 

 no longer the original substance, but its decomposition products are 

 present. These are the products which Ehrenberg (see above) ob- 

 tiiiued on treating his ethereal formylchloridoxime solution with a 

 large quantity of aqueous ammonia. The primary product of the 

 reaction, the ammonium salt of cyanisonitrosoacethydroxamic acid, 

 was obtained by him only in traces, and was not further investigated.* 

 It simply remained dissolved in the aqueous ammonia solution, be- 

 cause he used a very lai'ge amount of the solution. He obtained, on 

 allowing this solution to stand in the air, three compounds. First, a 

 substance,! C3H4N4O2, which separates out in yellow needles ; on 



* Journ. f. prakt. Chem., [2.], XXX. 47. t Ibid., XXX. 49. 



