130 TJeport of Department of Ani:mal Txbustry of the 



phytate. The latter product, however, was found to contain some 

 barium. 



Two gm. of the analyzed tri-barium phytate was digested for 

 two hours in 25 cc. of 2.5 per ct. ammonia, filtered and washed in 

 dilute ammonia and finally in alcohol and dried in vacuum over 

 sulphuric acid. The product was a heavy white amorphous powder. 

 On moist litmus paper it showed a neutral reaction. 



For analysis the substance was dried at 130° C. 

 0.1509 gm. substance gave 0.1205 gm. BaS04 and 0.0762 gm. Mg2P207. 

 0.1747 gm. « " 0.0026 gm. N (Kjeldahl*) 



For CeHiaOsvPeBas (NH4)2 = 1425. 

 Calculated P 13.05 per ct., Ba 48.19 per ct., N 1.96 per ct. 

 Found P 14.07 per ct., Ba 46.99 per ct., N 1.48 per ct. 



By evaporating the filtrate from the above to dryness on the 

 water-bath an amber-colored mass remained which after drying 

 at 130° C. gave the following result on analysis: 



Found P 20.51 per ct., Ba 6.65 per ct., N 10.48 per ct. 



PENTA-MAGNESIUM AMMONIUM PHYTATE. 



Two gm. phytic acid was dissolved in 400 cc. water and then 

 precipitated by adding excess of magnesia mixture slowly and under 

 constant shaking. After the precipitate had settled the supernatant 

 liquid was decanted, the residue filtered and washed with water until 

 free from chlorides and finally washed in alcohol and ether and dried 

 in vacuum over sulphuric acid. 



The product was a fine white amorphous powder and weighed 

 2.7 gm. It reacts neutral on moist litmus paper. 



For analysis it was dried at 130°. 

 0.1089 gm. substance gave 0.0832 gm. Mg2P207 for P. 

 0.1089 gm. « " 0.0705 gm. Mg2P207 for Mg. 



0.1248 gm. « « 0-0039 gm. N 1 J..,, ,^. 



0.0893 gm. « " 0.0028 gm. N / ^^^^^^^^^ 



For C6Hi2027P6Mg5(NH4)2 = 859.5. 

 Found P21.29per ct.,Mg 14.13 perct.,N 3.12 per ct.— 3.13 per ct. 

 Calculated P 21.64 per ct., Mg 14.13 per ct., N 3.25 per ct. 



If the phytic acid is first neutrahzed with ammonia and then 

 precipitated with magnesia mixture the same product is obtained. 



Two gm. phytic acid in 400 cc. water was neutralized with ammonia, 

 precipitated with excess of magnesia mixture, filtered, washed free 

 of chlorides with dilute ammonia and then in alcohol and dried in 

 vacuum over sulphuric acid. 



For analysis the substance was dried at 130° C. 



Found P 21.49 per ct., Mg 13.96 per ct., N 3.47 per ct., 3.48 per ct. 



TETRA-CUPRIC DI- CALCIUM PHYTATE. 



To a solution of 2 gm. phytic acid in 200 cc. water excess of calcium 

 chloride was added and the solution then neutralized with ammonia. 



* This and subsequent nitrogen determinations were made by Mr. M. P. Sweeney. 



