354 Repokt of the Department of Chemistry of the 



The insoluble portion was changed slowly into a semi-crystalline 

 precipitate. It was filtered and washed in water and then recrystal- 

 lized as follows: It was dissolved in a small quantity of about 3 per 

 ct. hydrochloric acid, the free acid nearly neutralized with barium 

 hydroxide; a concentrated solution of 10 grams of barium chloride 

 was added, the solution filtered and alcohol added gradually with 

 constant shaking until a slight permanent cloudiness was produced. 

 On standing the substance crystallized slowly in the usual crystal 

 form, i. e., in globular masses of microscopic needles. After two 

 days the crystals were filtered off, washed free of chlorides in water 

 and then in alcohol and ether and dried in the air. Yield 4.5 grams. 

 The substance gave no reaction with ammonium molybdate. 



A further quantity of the same-shaped crystals was obtained 

 from the aqueous solution containing the water-soluble portion of 

 the amorphous salt by adding to it 2.5 grams barium chloride and 

 allowing to stand over night. The balance of the water-soluble 

 portion of the substance was recovered by precipitating with an 

 equal volume of alcohol. The resulting precipitate was filtered, 

 washed free of chlorides with dilute alcohol, alcohol and ether and 

 dried in vacuum over sulphuric acid. Yield 4.1 grams. 



These substances were analyzed after drying at 105° in vacuum 

 over phosphorus pentoxide. 



The recrystallized salt gave the following results: 



Found: C = 6.28; H = 1.28; P = 15.93; Ba = 42.18; H 2 = 

 11.81 per ct. 



The crystalline salt which separated from the aqueous solution 

 gave 



C = 6.47; H = 1.23; P = 15.95; Ba = 42.77; H 2 = 12.62 per ct. 



These substances are therefore nearly pure heptabarium salts 

 of inosite hexaphosphate. 



Calculated for (CeHnO^Pe^Ba; = 2267. 



C = 6.35; H = 0.97; P = 16.40; Ba = 42.39 per ct. 



The water-soluble substance precipitated with alcohol gave the 

 following: 



Found: C = 8.58; H = 1.62; P = 15.86; Ba = 38.28 per ct. 



This substance was again treated with about 100 cubic centimeters 

 of cold water, the insoluble portion filtered off and the filtrate, after 

 adding 1 gram of barium chloride, precipitated with alcohol. After 

 washing in dilute alcohol, alcohol and ether and drying in vacuum 

 over sulphuric acid 1.4 grams of a white amorphous substance was 



