Table of Contents 



PAGE 



Introduction 5 



Inosite phosphoric acid or phytin 7 



Distribution of inosite phosphoric acid in the plant world 8 



Nomenclature and constitution of inosite phosphoric acid 9 



Properties of inosite phosphoric acid 14 



Properties of salts of inosite hexaphosphoric acid 16 



Synthetic esters of inosite and phosphoric acid 18 



Methods for estimating inosite phosphoric acid 19 



Other phosphoric acid esters occuring in plant material 20 



Effect of enzymes upon inosite phosphoric acid 23 



Methods for isolating inosite phosphoric acids from plant material 24-32 



Preparation of crystalline tribarium inosite hexaphosphate 28 



Preparation of the free inosite hexpahosphoric acid 29 



Method of analysis of barium inosite hexaphosphate 29 



Composition of crystalline barium inosite hexaphosphates 31 



Composition of free inosite hexaphosphoric acid 31 



Preparation of inosite monophosphoric acid 34-37-47 



Properties of inosite monophosphoric acid ,. . 35 



Cleavage of inosite monophosphoric acid -. 36 



Isolation of inosite triphosphoric acid 37 



Preparation of strychnine and barium salts of inosite triphosphoric acid 38-39 



Preparation of the free inosite triphosphoric acid 41 



Properties of inosite triphosphoric acid 42 



Cleavage of inosite triphosphoric acid 42 



Hydrolysis of phytin by the enzyme phytase 43 



Isolation of inosite 36-42-47 



Hydrolysis of the organic phosphorus compound of wheat bran by the enzyme 



phytase 48 



Destruction of the enzyme phytase 51 



Concerning some chemical properties of inosite hexaphosphoric acid 52 



Is inosite formed in the spontaneous decomposition of inosite hexaphosphoric 



acid ? 55 



Decomposition products of inosite hexaphosphoric acid after drying at 105°.. 57 



Methyl ester of inosite hexaphosphoric acid 61 



Summary 62 



Bibliography 64 



