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Hydroxypropylmethyl cellulose

Hydroxypropyl methylcellulose (HPMC) is a non-fermentable semi-synthetic dietary fibre, based on cellulose , which is a carbohydrate consisting of anhydroglucose units
Assay: Not less than 19% and not more than 30% of methoxy groups (-OCH3) and not less than 3% and not more than 12% hydroxypropoxy groups (-OCH2CHOHCH3), on the dried basis
DESCRIPTION:  Hygroscopic white or off-white powder, or granules or fine fibres

FUNCTIONAL USES: Emulsifier, thickening agent, stabiliser

CHARACTERISTICS
IDENTIFICATION:Solubility (Vol. 4) Swells in water, producing a clear to opalescent, viscous colloidal solution; insoluble in ethanol Foam formation A 0.1% solution of the sample is shaken vigorously. A layer of foam appears. This test permits the distinction of sodium carboxymethyl cellulose from other cellulose ethers.