Xanthan gum stability to acid and alkali

Xanthan gum solution is very stable to acid, at PH 5 - 10 so that theviscosity is not affected, the PH is less than 4 and greater than 11 had a slight change of viscosity. In the PH3 - 11 range, the maximum and minimum values of viscosity to less than 10%. Xanthan gum is soluble in a variety of acid solution, such as sulfuric acid, nitric acid 5% 5%, 5% acetic acid, 10% hydrochloric acid and 25% phosphoric acid, and the xanthan gum acid solution at room temperature is quite stable, several months amatter will not change. Xanthan gum can also dissolve in sodium hydroxide solution, and has a thickening properties. Resulting solution isstable at room temperature. Xanthan gum is a strong oxidizing agent, such as perchloric acid, sulfuric acid degradation, with the increase of temperature, accelerated degradation.