812 



IX. THE VITAMIN E GROUP 



5. Properties of the Tocopherols 



The tocopherols and their esters are soluble in fat solvents and insoluble 

 in water. Although such esters as the allophanates, the p-nitrophenyl- 



F\g. 2. Crystalline natural a-tocophcrol ( X30)." 



Fig. 3. Crystalline natural 7-tocopherol (XlO.5).-'^ 



urethans, and the 3,5-dinitrobenzoates were the only crystalline forms which 

 had been obtained over a number of years, Robeson*^ has recently been 



