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Food additives data book - wordpres

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Polysaccharides 728<br />

NAME: Xanthan<br />

CATEGORY: Polysaccharides<br />

FOOD USE: Soups/ Syrups/ Beverages/ Dairy products/ Dressings/ Dry formulated products/ <strong>Food</strong> packaging/<br />

Edible films and coatings/ All food products<br />

SYNONYMS: Beta-D-(1 Æ 4) glucose polymer with a trisaccharide side chain composed of alternate glucopyranosyl<br />

units. The side chain is composed of a beta-D-pyranosyl unit between two mannopyranosyl units with<br />

pyruvate and acetyl substituents/ CAS 11138-66-2/ EINECS 234-394-2/ E415/ Gum xanthan/ Corn<br />

sugar gum/ Alginoid/ Dariloid/ Merecol/ Merezan/ Rhodigel/ Ticaxan<br />

MOLECULAR MASS: 3–50 ¥ 10 6<br />

PROPERTIES AND APPEARANCE: White/off-white powder or soft flakes<br />

SOLUBILITY % AT VARIOUS Solubility varies with molecular weight. Generally, xanthan is soluble in water, sucrose solutions,<br />

TEMPERATURE/pH COMBINATIONS: sodium chloride solution and ethanol solutions, but solubility in vegetable oils and propylene glycol is<br />

limited.<br />

Solubility declines with increasing molecular weight and increasing concentration. It is essentially<br />

pH-independent (pH 4 to pH 8). Elevated temperatures will significantly improve the dispersion of high<br />

molecular-weight xanthans<br />

FUNCTION IN FOODS: Thickening agent; stabiliser; bulking agent; suspending agent<br />

ALTERNATIVES: Carrageenans; dextrans; starches; locust bean gum; guar gum; gelatin; agar; alginate (applicationdependent)<br />

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

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

polymers will reduce the viscosity.<br />

Xanthan forms aggregates of single or double helices in solution with a weak gel interaction. This<br />

weak gel formation manifests as a high yield point which helps suspend particles (herbs, fruit chunks,<br />

emulsion droplets) in viscous solutions. Synergistic interactions with gelatin and gum arabic.<br />

Forms gels with locust bean gum and guar gum

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