Properties of Xantan Gum

Properties of Xantan Gum II

5. Thermal Stability

The viscosity of xanthan gum solution won’t change greatly with the temperature. The viscosity of ordinary polysaccharides will change by heating, but the viscosity of xantan gum is almost unchanged in temperature between 10 to 80 degrees. Even is the solution is in low concentration, it still shows the stable high viscosity in a wide range of temperature. When 1% xantan gum solution (including 1% potassium chloride) is heated from 25 degrees to 120 degrees, its viscosity will change by only 3%.

6. PH Stability

Xantan gum solution is stable in PH. If the PH is 5 -10, the viscosity won’t be affected. If <4 or >11, the viscosity will slightly change. When the PH is in a range of 3-11, the difference of the maximum and minimum viscosity is less than 10%. Xantan gum is soluble in various kinds of acid solution, such as 5% sulfuric acid, 5% nitric acid, 5% acetic acid, 10% hydrochloric acid, 25% phosphoric acid. The xantan gum acid solution maintains stable in normal temperature. Even after several months, its property won’t change. Xantan gum solution is also soluble in caustic soda solution and possesses the thickening property. And the solution is very stable in room temperature. Xantan gum can be graded by such strong oxidizers as perchloric acid, peroxosulfuric acid. Furthermore, the degradation will speed up in line with the elevated temperature.

7. Stability in Salt Resistance  

The xantan gum can maintain its viscosity when dissolved into saline solution such as kali salt, sodium salt, calcium salt and magnesium salt. When in relatively high salinity circumstances, even if in saturated saline solution, it can still maintain its dissolubility and won’t precipitate or flocculate. And the viscosity will be almost unchanged.

8. Stability in Enzymatic Hydrolysis

The stable double helix structure of xantan gum enables itself to possess strong antioxidant and enzyme-resistant capacity. Many enzymes like protease, amylase, cellulose and hemicellulose can’t get xantan gum degraded.

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On December 25th, 2012, posted in: Products and Techniques, xanthan gum by Tags:

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