OP ARTS AND SCIENCES. 367 



the corresponding mono compound, which, according to "Wallach and 

 Gossmaun,* gives kyaphenine or benzonitrile and benzolmonosulphonic 

 acid. The benzoyl compound is nearly insoluble in water, whether 

 hot or cold, but not absolutely so, as a moist crystal, after being boiled 

 with water, if laid upon litmus paper, gives an acid reaction. It is 

 tolerably soluble in alcohol or methylalcohol, especially when boiling, 

 nearly insoluble in ether, chloroform, or glacial acetic acid, essentially 

 insoluble in ligroine, benzol, or cai"bonic disulphide. It is easily sol- 

 uble in sodic, ammonic, or baric hydrates, or in sodic carbonate ; 

 hydrochloric acid precipitates the original substance from these solu- 

 tions. The solution in ammonic hydrate, if evaporated to dryness on 

 the water-bath, leaves a colorless varnish, which dissolves again in 

 water; this solution, however, gives no characteristic precipitates with 

 the common reagents, although we may mention the white precipi- 

 tates produced by argentic nitrate and basic plumbic acetate (neutral 

 plumbic acetate gives no precipitate). We have studied the sodium 

 and barium salts, and intended also to analyze the silver salt, but 

 found that it was too soluble to be purified conveniently by washing, 

 and came down from its hot aqueous solution as a varnish.- 



Sodic Benzoylbenzoltrisulphamide, CgH3(S02NNaC- 11.0)3. — This 

 salt was made by boiling a solution of the calculated amount of 

 sodic carbonate with benzoylbenzoltrisulphamide, and evaporating to 

 dryness, finally spontaneously. Upon drying at 100° it lost vary- 

 ing amounts of water, but in no case so much as one molecule ; we 

 are therefore inclined to think it was only hygroscopic water, as the 

 salt was of a varnish-like consistency, which would offer great resist- 

 ance to air-drying. 



0.2406 grm. of the salt dried at 100^ gave 0.0794 grm. of sodic 

 sulphate. 



Calculated for CcH3(S02NNaC7H50)3. Found. 



Sodium 9.95 10.43 



The salt is a white varnish, which we did not succeed in obtaining in 

 crystals ; it dissolves in water very slowly, but does not need a large 

 amount for complete solution. The solution is neutral, and we did 

 not succeed in preparing an acid salt, as when the free benzoylbenzol- 

 trisulphamide was boiled with one molecule of sodic carbonate, nearly 

 two thirds of the amide remained undissolved, and the solution was 

 barely acid. 



* Ber. d. ch. G., 1878, p. 754. 



