Chitosan can dissolve in diluted acetic acid solutions so you can try 1 acetic acid. The antimicrobial mechanism of dissolved water-insoluble chitosan was hypothesized as forming an impervious layer around the cell.

Solubility Of Chitin Solvents Solution Behaviors And Their Related Mechanisms Intechopen
Chitosan is not soluble above pH 6.

Why chitosan is not soluble in water. The results suggest that optimum chitosan as food preservative should be water-insoluble chitosan from mild depolymerization of native chitosan. The water-insoluble chitosans with Mw around 510 4 were the optimum for antimicrobial action in these tested samples. So it is not water soluble.
The antimicrobial mechanism of dissolved water-insoluble chitosan was hypothesized as forming an impervious layer around the cell.

Solubility Of Chitin Solvents Solution Behaviors And Their Related Mechanisms Intechopen

Solubility Of Chitin Solvents Solution Behaviors And Their Related Mechanisms Intechopen

Solubility Of Chitin Solvents Solution Behaviors And Their Related Mechanisms Intechopen

Exploring The Factors Affecting The Solubility Of Chitosan In Water Sogias 2010 Macromolecular Chemistry And Physics Wiley Online Library

Newest And Top Quality Of Seaweed Fertilizer Algas Marinas With Pure 100 Organic Process Seaweed Extract Crop Protection Grass Care

Using Chitosan And Chito Oligosaccharide In Animal Nutrition All About Feed

Solubility Of Chitin Solvents Solution Behaviors And Their Related Mechanisms Intechopen

Solubility Of Chitosan In Aqueous Acetic Acid And Pressurized Carbon Dioxide Water Experimental Equilibrium And Solubilization Kinetics Sciencedirect
