Page 62 - final Practical handout PG 303-Cogno-2- 2024-2025

Clinical Pharm D Level 2 Pharmacognosy-2 (PG 303)

Dried Juices Resin Oleo-gum resins
Aloe ‫الصبر‬ Colophony
Myrrh Asafoetida
Picture (rosin)
‫مر البطارخ‬ ‫الحلتيت‬
‫راتنج التربنتينا‬

Chemical 1. Bromine water 1. Test for abietic 1. Vapor of 1. Place a drop of
test test for barbaloin: bromine: violet sulphuric acid on
yellow precipitate acid: color is given by the freshly
due to the genuine fractured surface
tetrabromoaloin. dilute cupper myrrh. a bright red or
reddish-brown
2. Borax test for acetate emerald 2. Nitric acid: color is produced
anthranols: purplish violet changing to
Green green color is violet on
fluorescence due produced. washing with
to formation of 2. Test for water.
Aloe-emodin terpenes: glacial 3. for Gum
anthranol acetic acid, heat fraction: oxidase 2. The freshly
gently, cooling + enzyme test. fractured surface
3. Test for free H2SO4 a bright assumes a green
anthraquinone purplish red color when
(Aloe-emodin) color changes to touched with
(Borntrager's violet nitric acid
test): (diluted with
with dil. NH4OH, equal volume of
a rose red color in water).
the ammoniacal
layer.

Taste Alliaceous
Odor

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