09.06.2013 Views

Food additives data book - wordpres

Food additives data book - wordpres

Food additives data book - wordpres

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Polysaccharides 710<br />

NAME: Karaya gum<br />

CATEGORY: Polysaccharides<br />

FOOD USE: Meringue/ Sherbet/ Ices/ Cheese spreads/ Ground meat products/ French dressing<br />

SYNONYMS: CAS 9000-36-6/ EINECS 232-539-4/ E416/ Sterculia gum/ Sterculia urens gum/ India tragacanth/<br />

Indian tragacanth/ Kadaya gum/ Gum karaya<br />

MOLECULAR MASS: 9,500,000<br />

ALTERNATIVE FORMS: Karaya gum is slightly acidic, so different salt forms are possible, chiefly calcium and magnesium<br />

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

SOLUBILITY % AT VARIOUS Karaya gum is poorly soluble in water and sparingly soluble in other liquids. Optimum solubility is at<br />

TEMPERATURE/pH COMBINATIONS: pH 6–8. Viscosity is dependent primarily on initial particle size<br />

FUNCTION IN FOODS: Stabiliser; thickener; texturiser; crystallisation inhibitor<br />

ALTERNATIVES: Gum ghatti; gum tragacanth (application-dependent)<br />

TECHNOLOGY OF USE IN FOODS: Karaya gum swells in water; larger particles will produce textured pastes whereas smaller particle sizes<br />

yield more homogeneous, viscous preparations. Tannins in the karaya gum result in a lightening of the<br />

solution colour in acidic pHs and a darkening in alkaline pHs.<br />

Karaya gum is a complex polysaccharide aned the structure has not been fully determined. It<br />

contains galactose, rhamnose, D-glucuronic acid. It is acetylated (8%) and contains a substantial<br />

quantity of uronic acid (37%)<br />

SYNERGISTS: None known<br />

ANTAGONISTS: None known<br />

FOOD SAFETY ISSUES: Mildly toxic. ADI 0–20mg/kg. The powder is combustible

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!