It is a white or slightly yellow amorphous powder, soluble in water, clear and transparent in aqueous solution, stable in nature, with many characteristics, such as strong antibacterial, fresh-keeping, and amphoteric polyelectrolyte.

Carboxymethyl chitosan is a kind of water-soluble chitosan derivative, which has many characteristics, such as strong antibacterial property, fresh-keeping function and amphoteric polyelectrolyte. It is extensively applied in cosmetics, fresh-keeping and medicine, and is also one of the chitosan derivatives studied frequently in recent years. Carboxymethyl chitosan is a kind of chemical compound appearing in recent years, which is of great significance in medicine, chemical industry, environmental protection and health care products. Its stability and pharmacological effects such as antibiosis, anti-infection, lipid-lowering and arteriosclerosis prevention are destined to play a greater role in human daily life in the future.