Sodium Hyaluronate (SH) is the sodium salt form of hyaluronic acid, a straight-chain macromolecular mucopolysaccharide composed of repeating disaccharide units of glucuronic acid and N-acetylglucosamine. It is highly water-soluble and widely distributed in the extracellular matrix of human and animal tissues, including skin, joints synovial fluid, vitreous humor, umbilical cord, and cockscomb. Sodium Hyaluronate is known for its excellent moisturizing, lubricating, and tissue-repairing properties, making it a key ingredient in pharmaceuticals, cosmetics, and nutritional supplements.

Ethyl cellulose is the ethyl ether of cellulose, a long-chain polymer with β-anhydroglucose as a unit linked by acetal, and is one of the most widely used water-insoluble cellulose derivatives.

HPMC is a semi-synthetic, inactive, viscoelastic polymer often used as a lubricant in ophthalmology or as an excipient or excipient in orally administered drugs.

Polyvinylpyrrolidone (PVP) is currently one of the important excipients. It is mainly used in the pharmaceutical industry as a binder, film-forming agent, thickener for tablets and capsules, as well as a cosolvent for poorly soluble drugs and a pore-forming agent in the film industry.

Povidone-iodine is an unstable complex formed by the complexation of surfactants and iodine, which is an iodophor external disinfectant. It has good stability, no irritation, and has strong killing effect on bacteria, viruses, fungi, molds and spores. It is the first choice for iodine-containing fungicides.