New York Agricultural Experiment Station. 129 



For C6H12O9 [(P03H)2 Ba]3 =ll20. 

 Calculated C 6.42 per ct.,H 1.60 per ct.,P 16.60 perct.,Ba36.78 per ct. 

 Found C 6.42 per ct.,H 1.44 per ct.,P 16.89 per ct.,Ba37.25 perct. 



P 16.85 perct.,Ba37. 17 perct. 



The barium salt prepared in the same manner from a natural 

 crude magnesium organic phosphorus compound gave the following 

 result on analysis: 



0.2057 gm. substance gave 0.0273 gm. H2O and 0.0480 gm. CO2 

 0.1422 gm " « 0.0886 gm. BaS04 and 0.0841 gm. Mg2P207. 



Found C 6.36 per ct., H 1.48 per ct., P 16.48 per ct., Ba 36.66 per ct. 



The two salts are therefore identical. 



CRYSTALLIZED TRI-BARIUM PHYTATE. 



One gm. purij&ed phytic acid was dissolved in 10 cc. water and 4 

 gm. of the above mentioned tri-barium phytate added. It was 

 filtered from traces of undissolved particles and allowed to stand for 

 two days at room temperature. The substance had then separated 

 as a heavy crystalline powder of irregular form. From less con- 

 centrated solutions the substance separates in small, needle-shaped 

 crystals. 



The substance was filtered, washed well in water and finally in 

 alcohol and ether and dried in the air. 



For analysis it was dried at 120° C. 

 0.1972 gm. substance lost 0.0153 gm. H2O. 



0.2028 gm. substance gave 0.1251 gm. BaS04 and 0.1216 gm. Mg2P207. 

 Found P 16.71 per ct., Ba 36.30 per ct. 

 Calculated for 5H2O, 7.44 per ct. Found 7.75 per ct. 



PENTA-BARIUM PHYTATE. 



This salt is obtained on neutralizing a solution of the tri-barium 

 phytate in 0.5 per ct. hydrochloric acid with barium hydroxide and 

 then acidifying with acetic acid. The precipitate was filtered, 

 washed thoroughly in water, alcohol and ether and dried in vacuum 

 over sulphuric acid. 



The product was a white amorphous powder. For analysis the 

 substance was dried at 130° C. 



0.2970 gm. substance gave 0.0307 gm. H2O and 0.0500 gm. CO2. 

 0.2507 gm. " " 0.2080 gm.BaS04 and 0.1207 gm.Mg2P207. 



0.1856 gm. « " 0.1543 gm. BaS04 and 0.0899 gm. Mg2P207. 



For C6Hi4027P6Ba5 = 1391. 

 Calculated C 5.17 perct.,H 1 .00 per ct., P 13.37 per ct., Ba 49.37 per ct. 

 Found C 4.59 perct.,H 1.15 per ct.,P13.42per ct.,Ba48.82 perct. 



P 13.50 per ct.,Ba 48.92 per ct. 



PENTA-BARIUM AMMONIUM PHYTATE. 



When the tri-barium phytate is digested in dilute ammonia it is 

 transformed into the penta-barium ammonium salt and ammonium 



