Starch

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Synonyms Amylum
BS Starch consists of polysaccharide granules obtained from the grains of Maize Zea mays L. or of rice Oryza sativa L or of wheat Triticum aestivum L. or from the tubers of the potato Solarium tuberosum L.
Family Graminae, Solanaceae
CC
  • Starch contains generally a mixture of two polysaccharides, amylopectin (α- amylose) and amylose (β-amylose).
  • Amylopectin it is the main constituent of most of the starches (more than 80%) and is present in outer parts of granules. It contains both strait chained and branched glucose unit. It is insoluble in water and is responsible for gelatinizing property. It gives bluish black colour with iodine solution.
  • Amylose most starches contain 20% amylose. It contains straight chained glucose units and is present in inner parts of granules. It is soluble in water and produces blue colour with iodine solution.
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    Uses
  • It is mainly used as a dusting powder.
  • As a Pharmaceutical aid.
  • Used as an antidote for iodine poisoning.
  • Source of Food-nutrition.
  • Protective and demulcent.

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