This video shows How to do Diazotization. When a chemical compound is testing for phenol or other phenol groups, first it is tested with neutral ferric chloride. After that comfirmatory test. Diazotization is one of comfirmatory tests. Presence of the phenols test give orange red color dye as positive result. For this video I uses 2-naphthol and phenol as test compounds.

Warning !

Concentrate hydrochloric acid is corrosive. Aniline is carcinogenic and toxic. Some phenols are caustic and should not be allowed to come in contact with the skin.

Additional notes : Test sample and diazonium salt must be at 5C or below before mix together to get good result from this experiment.
Test sample is a solution of suspect sample in 10% sodium hydroxide at 5C.

Educational Purposes Only !

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