Page 134 - Pharmacognosy 02-06203

Karaya gum (Indian Tragacanth, E416)

It is the dried gummy exudates from the tree Sterculia urens family sterculiaceae.
Origin: India, Pakistan
Shape: fine powder or granules.
Odor: acetic acid odor.
Solubility: the least soluble gum in water but swells rapidly, unlike other gums it
swells in 60 % alcohol.
Constituents:
A branched partially acetylated polysaccharide, on hydrolysis yields galacturonic
acid, glucuronic acid, galactose, rhamnose and acetic acid.
Uses:
As a batch for salicylic acid patches for warts.
For denture fixatives.

Locust bean gum (Carob gum, E410)

Endosperm separated from seeds of Ceratonia siliqua Linn family fabaceae
(Leguminosae).
Solubility:
Insoluble in alcohol but swells with water to form a viscous mass.
Constituents:
Galactomannan, 1,4-linked β-D-mannopyranose backbone with branch point from
their 6 position linked to galactose.

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