- Several qualitative tests for phenol are used to detect the presence of phenol or phenolic compounds:
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Ferric Chloride Test (One of the Qualitative Tests for Phenol):
- Phenols form colored complexes (violet, blue, green) with FeCl₃.
- Positive Test: Appearance of color indicates phenols.
-
Bromine Water Test:
- Phenols react with bromine to form a white precipitate of tribromophenol.
- Positive Test: Decolorization and white precipitate indicate phenols.
-
Millon’s Test:
- Phenols react with Millon’s reagent to form a red precipitate.
- Positive Test: Formation of red precipitate indicates phenols.
-
Lieben’s Iodoform Test:
-
Phthalein Dye Test:
- Phenols form phthalein dyes when treated with phthalic anhydride and concentrated sulfuric acid.
- Positive Test: Appearance of pink/red color after heating indicates phenols.
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