Page 95 - PG 504-theoretical notes-phyto-1-2024-2025..

Clinical pharmacy PharmD program Third level Phytochemistry-1 (PG-504)

Uses of starch:

▪ As a component of dusting powder.

▪ In the form of suspension, it is used as anti-dote for iodine poisoning.

▪ Disintegrating agent in tablet-making.

▪ Diluent agent in tablet making.

▪ Emollient (Glycerin of starch).

▪ Starting material for the preparation of liquid glucose, dextrose, maltose and
dextrins.

2) Dextrin

They are obtained from starch by enzymatic degradation (diastase) or by

incomplete acid hydrolysis. The degradation products vary in molecular weight

and color produced with iodine in the following decreasing order:

Amylodextrin Blue color with iodine.

• Erythrodextrin Reddish-brown with iodine.

• Achrodextrin No color with iodine.

Uses: 1) In infant nutrition (prevent the curdling of milk in baby’s

stomach). 2) As substitute for gums.

3) Glycogen

▪ also known as animal starch

▪ Stored in muscle and liver

▪ Present in cells as granules (high MW)

▪ Contains both  (1,4) links and  (1,6) branches (more frequent than in

starch). The fine structure has been indicated to be similar to that of

amylopectin, but more highly branched.

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