FIELD: organic chemistry. SUBSTANCE: invention describes method of synthesis of chitosan polyethylene glycol ester that involves chitosan dissolving in acetic acid, alkalization followed interaction of reaction mixture with ethylene oxide under pressure above 1-3 atm at temperature 60-100 C. Synthesized product solution is purified and solvent is distilled off. Synthesized product has no highly toxic substances. EFFECT: improved method of synthesis and quality of product. 3 cl
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