A characteristic test for identifying phenols and enols is the reaction with neutral Ferric chloride ($FeC{l}_3$).

• Observation: A violet, blue, or green coloration is produced.
• Chemical basis: Formation of a colored coordination complex between the phenoxide ion and the $F{e}^{3+}$ center.
• Most aliphatic alcohols do not show this reaction, making it an excellent diagnostic tool for phenolic compounds in organic analysis.