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Food additives data book - wordpres

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Polysaccharides 722<br />

NAME: Propyleneglycol alginate<br />

CATEGORY: Polysaccharides<br />

FOOD USE: All food products/ Edible films and coatings<br />

SYNONYMS: CAS 9005-32-2/ E405/ PGA/ Hydroxypropyl alginate/ Alginic acid ester with 1,2-propanediol/<br />

Propane-1,2-diol alginate<br />

FORMULA: Variable, depending on propylene glycol substitution, ratio of mannuronic to guluronic acid, and the<br />

presence of other substituents<br />

MOLECULAR MASS: Variable<br />

ALTERNATIVE FORMS: None<br />

PROPERTIES AND APPEARANCE: White powder<br />

SOLUBILITY % AT VARIOUS Solubility in aqueous solution varies with differences in structure, molecular weight, pH and cations.<br />

TEMPERATURE/pH COMBINATIONS: The primary property of propylene glycol is that, unlike other alginates, it is soluble at low pHs<br />

FUNCTION IN FOODS: Gelling agent; thickening agent; stabiliser; flocculant; bulking agent. It can be used to stabilise<br />

emulsions and to retard ice-crystal formation<br />

ALTERNATIVES: Alginates; carrageenans; methylcellulose; gum ghatti; xanthan; furcellaran (application-dependent)<br />

TECHNOLOGY OF USE IN FOODS: Propyleneglycol alginate should be dispersed in cold water and heated to 80°C for 10 minutes to<br />

hydrate the polysaccharide. A high shear mixer will aid dispersion, although prolonged shear of high<br />

molecular-weight polymers will reduce the viscosity.<br />

In addition to viscosity, propylene glycol alginate has surface-active properties due to the<br />

hydrophobic nature of parts of the molecule. This makes it a useful emulsifier<br />

SYNERGISTS: Proteins<br />

ANTAGONISTS: None known

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