Why the pH of xanthan gum in aqueous solution is 7 (neutral) when it has glucuronic and pyruvic acids in its chemical structure?

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Jai Ghosh

No doubt it has these 2 acids but these are in bound form and not in ionic forms and hence the solution has neutral pH.

Ernest Ong

Dr. Ghosh, thank you for your answer. However, as I know, xanthan gum is an anionic polysaccharide that is easily dissolve in water. Therefore, xanthan gum should be negatively charged in aqueous solutions.