Definition Tannins are a group of complex polyphenolic compounds found in many plants. They have the ability to form strong complexes with proteins, polysaccharides, alkaloids, and other macromolecules. Tannins are known for their astringent taste and their ability to precipitate proteins, which is why they are often used in tanning …
DeepakRajput 
Flavonoids: Definition, Classification, Properties, and Tests for Identification
Definition Flavonoids are a diverse group of polyphenolic compounds found in plants, characterized by a common structure consisting of two aromatic rings (A and B) joined by a three-carbon bridge that usually forms a closed pyran ring (C). They are widely recognized for their beneficial effects on health due to …
Qualitative Tests for Phenols
Various qualitative tests exploit the unique chemical properties of phenols to identify them. Some commonly employed qualitative tests for phenols detect the characteristic reactions associated with the presence of phenolic functional groups. 1. Iron (III) Chloride Test Principle: Phenols react with iron (III) chloride (FeCl3) to form colored complexes. Observation: …
Lead Acetate Test
The Lead Acetate Test is a chemical method used to identify the presence of tannins in a given sample. This qualitative test relies on the formation of insoluble lead tannate precipitates when tannins react with lead acetate. Here’s a detailed note on the Lead Acetate Test for tannins: Procedure 1. …
