filtered off, washed free of chlorides with water and then in alcohol 

 and ether and dried in vacuum over sulfuric acid. It weighed 0.65 

 gram. 



The filtrate from above containing the water-soluble portion of 

 the substance was acidified with a few drops of dilute hydrochloric 

 acid, heated to boiling and alcohol added until a slight, permament 

 cloudiness remained. On standing over night a portion had sep- 

 arated in the form of a heavy, granular powder. Under the micro- 

 scope no definite crystal form could be observed, but it appeared to 

 consist of transparent globules. It was filtered off, washed free of 

 chlorides in 30 per cent, alcohol, alcohol and ether, and dried in the 

 air. Yield, 0.67 gram. It was free from inorganic phosphate. 



The mother-liquor from above was precipitated with alcohol. 

 After settling, the precipitate was filtered, washed with dilute alcohol, 

 alcohol and ether, and dried in vacuum over sulfuric acid. Yield, 1.55 

 grams. The substance was a snow-white, amorphous powder. It was 

 free from chlorides and inorganic phosphate. 



These three different portions were analyzed after drying at 105° 

 in vacuum over phosphorus pentoxide. 



The water-insoluble portion gave : 



C = 9.40; H=1.65; P= 13.76; Ba = 39.56 per cent. 



Judging by the analysis this substance consists mainly of barium 

 inosite tetraphosphate. 



The granular powder which separated from the hot, dilute hydro- 

 chloric acid solution and alcohol on cooling gave the following result : 



C = 12.70; H = 2.40; P= 13.84; Ba = 32.29; H 2 = 12.77 per 

 cent. 



This substance appears to be mainly barium inosite triphosphate, 

 although not pure. It was mixed probably with some barium inosite 

 diphosphate. 



The water-soluble portion precipitated with alcohol gave: 



C = 14.07; H = 2.31; P= 12.92; Ba = 33.04 per cent. 



Deducting the barium found, allowing for hydrogen and water, 

 and calculating to the free acid these results became : 



C = 20.88; H~4.ll; P— 19.16 per cent. 



This is approximately the composition of inosite diphosphoric 

 acid, C e H 14 12 P 2 = 340. 



Calculated: C=21.17; H=4.11 ; P=18.23 per cent. 



That these substances, separated from the partially decomposed 

 inosite hexaphosphoric acid, are inosite esters of phosphoric acid and 

 not condensation or other decomposition products, is evident from the 

 fact that on complete cleavage inosite is obtained. Unfortunately, the 

 amount of each of the above substances was too small to permit of 



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