8 ART. 14. T. SUZUKI : THE OXIMES AND 



The free imide, which is very soluble in water, as well as 

 in alcohol, has a strong acid reaction. It can be precipi- 

 tated from the aqueous solution by adding strong sulphuric or 

 hydrochloric acid. Even a very dilute solution of the imide 

 gives a crystalline precipitate on the addition of au equal volume 

 of strong hydrochloric acid. The imide has a bitterish sour 

 taste. The ammonium salt is tolerably soluble in water and 

 readily crystallises in short prisms. The potassium salt is 

 also somewhat soluble in water and crystallises in long needles 

 of a pearly lustre. 



The most remarkable property of this imide is the slight 

 solubility of the sodium salt, the solution saturated at 24° being 

 about 0.04 normal. It can, therefore, be employed for the 

 detection of sodium. The sodium salt is, however, tolerably 

 soluble in hot water, from which it can be obtained in flat 

 plates. The salts of barium and lead form prismatic crystals of 

 less solubility. The silver salt is also slightly soluble and 

 crystallises in white needles. It can be obtained by adding a 

 solution of the free imide to a solution of silver nitrate. A 

 double salt of silver and potassium was obtained as a white 

 crystalline precipitate by adding silver nitrate to a warm solution 

 of the potassium salt. The mercurous salt forms an insoluble 

 white heavy crystalline precipitate. 



Analytical data. 



m-Benzenedisulphimido. 



a) Water of crystallisation. 

 0.1217 gr., on drying at 100°-10.5°, lost 0.0093 gr. 



