This file contain the test about the flevono

1. -By Sourabh Chauhan
Test for identification
flavonoids

2. Name : SOURABH TARAKESHWAR CHAUHAN
Class : S.Y.B Pharm
Roll No : 18
Division : A
Subject : Physical Pharmaceutics – Ⅱ
College : Shree D.D. Vispute College Of Pharmacy And Research Center, Gate No-04, Vichumbe,
New Panvel.

3. • Definition:
Group of polyphenolic compounds which are found in fruits, flowers,
seeds & vegetable. They are more common in higher plants being
abundant in families, Rutaceae, Leguminosae, Compositae. Flavonoids
(named from flavus meaning yellow, nature) are a class of metabolites.
Polygonaceae, Umbelliferae & the Latin word their colour in plant
secondary

4. Physiological role:
1- Role in plant defense mechanism:- They have a very limited role in this
respect due to their low toxicity when compared with other plant
secondary metabolites such as alkaloids.
2- They are the pigments of flowers and attract pollinating insects.
3- They play a role in plant growth control by inhibiting & activating
enzymes.

7. Identification
A- Test for identification:-
The different types of flavonoides can be characterized by their
colored response to different tests (visible light ) or colored
fluorescence in UV light.
l- Reaction with aluminum chloride:
The different classes of flavonoids give yellow color with AIC13
but fluoresce differently in UV as shown in the following table .
light Flavones Flavonols Flavanones
Visible Yellow Yellow Yellow
UV Green Yellowish to
Yellowish-green
Pale-brownish

10. Thank You