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

Stiasny’s Test

Screenshot 2023 11 24 105041 Stiasny's Test

Stiasny’s test is a chemical method used to identify the presence of tannins in a given sample. This qualitative test relies on forming blue complexes between tannins and Stiasny’s reagent (ammonium molybdate and hydrochloric acid). Here’s a detailed note on Stiasny’s Test for tannins: Procedure 1. Preparation of Sample: Obtain a sample suspected to contain … Read more