92 



Phenol has no protective influence ; from the results obtained the 

 opposite would sooner be inferred. 



In acidic solution the properties of phenol differ widely from those 

 of glycine and alanine, in alkalic solution on the contrary phenol 

 behaves as monobasic acid jnst as glycine and alanine. 



TABLE IV. Influence of phenol on the destruction of glucose by alkali. 



500 milligram phenol neutralizes the action of about 5 cm^ 

 1,06 N. NaOH-solution = ± 5,3 cm^ N. NaOH. 



Regarding phenol as monobasic acid 500 milligram corresponds 



with =: 5,3 cm\ N.acid. So the agreement is sufficient. 



94 



In the above we have made acquaintance with two sensible 



methods, which enable us to determine the acidic or basic character 



