The FeCl3 Test
Shows positive test for:
Reactions:
phenols complex with the iron ion
How to perform the test:
About 20 drops of 5% FeCl3 solution (a yellow solution) are added to a tube containing 3 drops of the substance to be tested and the tube is stirred.
Indications of a positive test:
An intense color ranging from purple to reddish brown to green is observed.
a negative test (left) and a positive test (right)