ORGANIC PHOSPHORIC ACIDS OF WHEAT 



BRAK* 



R. J. ANDERSON. 



SUMMARY. 



I. The results of a more extensive investigation of the organic 

 phosphoric acid compound of wheat bran completely confirm the 

 results previously published in Technical Bulletin 22. 



Again it has been impossible to isolate any salts of phytic acid 

 or inosite hexaphosphate. 



The amorphous barium salts obtained agree in composition with 

 those previously reported. 



It appears probable, however, that these amorphous salts are 

 not homogeneous but that they are mixtures of salts of various 

 organic phosphoric acids. The isolation of definitely homogeneous 

 compounds from this mixture has not succeeded. 



Attention is called to the rather large content of oxalates in the 

 crude organic phosphoric acid compound and also to the high per- 

 centage of inorganic phosphate contained in wheat bran. 



II. A previously unknown organic phosphoric acid, inosite 

 monophosphate, CcHi 3 9 P, has been isolated in beautiful crystal- 

 line form from wheat bran. 



All the salts of this acid, with the exception of the lead salt, are 

 very soluble in cold water. The alkaline earth salts are not pre- 

 cipitated with ammonia, differing in this respect from other known 

 organic phosphoric acids as well as from ordinary phosphoric acid. 



I. CONCERNING THE ORGANIC PHOSPHORIC ACID 

 COMPOUND OF WHEAT BRAN. II. 



(Ninth Paper on Phytin.) 



INTRODUCTION. 



It has been shown in a preliminary report 1 from this laboratory 

 that the composition of the organic phosphoric acid isolated from 

 wheat bran is different from that of phytic acid or inosite phosphoric 

 acid which is present in other grains and seeds. Patten and Hart, 2 

 who first investigated this substance from wheat bran, came to the 

 conclusion that it was identical with the " anhydro-oxymethylene 

 diphosphoric acid " of Posternak. The analysis which they report 



1 Joum. Biol. Cheyn. 12: 447 (1912); and N. Y. Agric. Exp. Sta. Tech. Bull. 22. 

 (1912). b p 



i Amer. Chem. Joum. 31 : 566. 1904. 



* Reprint of Technical Bulletin No. 36, July. 



[362] 



