Tannins: Definition, Classification, Properties, and Tests for Identification

Screenshot 2024 06 01 123046 Tannins: Definition, Classification, Properties, and Tests for Identification

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 leather and in the clarification of … Read more

Vanillin HCl Test – Definition, Procedure

Screenshot 2023 11 24 104521 Vanillin HCl Test - Definition, Procedure

Vanillin HCl Test: The Vanillin HCl Test is a well-established qualitative chemical assay employed to detect the presence of tannins, particularly condensed tannins (proanthocyanidins), in plant-based or other biological samples. This test is predicated on the principle that tannins, under strongly acidic conditions, react with vanillin to form colored chromophores, primarily exhibiting red to pink … Read more