132 Eeport of Department of Aximal Industry of the 



For C6H24 O27P6 = 714. 



Calculated. Found a. Found b. 



C 10.08 per ct. 10.57 per ct. 10.76 per ct. 



H 3.36 " 3.21 " 3.22 " 



P 26.05 " 26.37 " 26.16 " 



Titrated against deei-normal sodium hydroxide using phenol- 

 phthalein as indicator the following results were obtained: 

 0.2648 gm. acid required 30.7 cc. N/10 NaOH. 

 Calculated for 8 NaOH 29.65 cc. 

 0.1593 gm. acid required 18.60 cc. N/10 NaOH. 

 Calculated for 8 NaOH 17.60 cc. 



INOSITE FROM THE CRUDE MAGNESIUM COMPOUND. 



Twenty-five gms. of the air-dried substance, containing 20 per ct. of 

 moisture, was heated with 100 cc. 30 per ct. sulphuric acid in a sealed 

 tube for about three hours at a temperature of 140° C. Two tubes 

 equally charged were heated at the same time. After cooling, the 

 reaction mixture was of dark brown color and a considerable quantity 

 of magnesium salts had crystallized out. 



The contents were washed into a beaker, filtered and diluted with 

 water to about 1500 cc. The sulphuric and phosphoric acids and 

 the magnesium were then precipitated by barium hydroxide, filtered 

 and well washed in hot water. The filtrate was evaporated to about 

 350 cc. and the excess of barium removed by carbon dioxide, filtered, 

 the filtrate decolorized with animal charcoal and then evaporated 

 on the water bath to a syrupy consistency. This was taken up in 

 a small quantity of hot water, filtered and alcohol added to the 

 filtrate until a cloudiness was produced. By scratching with a 

 glass rod crystallization began; more alcohol was then added and 

 the mixture placed in the ice-chest over night. After filtering and 

 washing in alcohol and ether and drying in the air the product 

 weighed from 5.1 to 5.4 gm. From the mother hquor a further 

 quantity of crystals from 0.4 to 0.6 gm. could be obtained on the 

 addition of ether and allowing to stand for twenty-four hours in 

 the cold. 



For purification the raw product was dissolved in 6 parts of water 

 and again brought to crystaUization by the addition of alcohol as 

 before. It was then obtained in large, thin, colorless plates. 



It gave the reaction of Scherer. The dried substance melted at 

 220° C. (uncor.) 



Dried at 100° C. 0.4136 gm. substance lost 0.0669 gm. H2O and 

 0.1600 gm. lost 0.0258 gm. H2O. 



The dried substance was analyzed. 



0.1342 gm. substance gave 0.0791 gm. H2O and 0.1981 gm. CO2. 



For C6H6(OH)6 = 180. 

 Calculated C 40.00 per ct., H 6.66 per ct., 2 H2O 16.66 per ct. 

 Found C 40.26 per ct., H 6. 59 per ct., 2 H2O 16.17 per ct. - 16.1 2 

 per ct. 



This substance was used in subsequent experiments with phos- 

 phoric acid. Some 40 gm. of inosite were prepared in this way. 



