Abstract: Provided is a novel oral mucosa application material that has good handling properties, has excellent application properties for being applied to the oral mucosa even if moisture or saliva on the surface of the oral mucosa is heavy, and is provided with a property for improving the effect of physically protecting an application site by containing the moisture or saliva after application and showing elasticity, and further, a property for remaining at the application site for a long time. This oral mucosa application material is provided with a freeze-dried body containing a polymer on an adhesion surface to the oral mucosa. The content of the polymer in the freeze-dried body is 20 mass % or more, and the content of hyaluronic acid in the polymer is 50 mass % or more.

Abstract: To provide a water-soluble hyaluronic acid gel which does not contain a large amount of an organic solvent, wherein hyaluronic acid is not chemically modified. A water-soluble hyaluronic acid gel which contains hyaluronic acid, a polyhydric alcohol, an acid, and 0-10% by mass of a water-soluble organic solvent.

Abstract: Provided is a novel oral mucosa application material that has good handling properties, has excellent application properties for being applied to the oral mucosa even if moisture or saliva on the surface of the oral mucosa is heavy, and is provided with a property for improving the effect of physically protecting an application site by containing the moisture or saliva after application and showing elasticity, and further, a property for remaining at the application site for a long time. This oral mucosa application material is provided with a freeze-dried body containing a polymer on an adhesion surface to the oral mucosa. The content of the polymer in the freeze-dried body is 20 mass % or more, and the content of hyaluronic acid in the polymer is 50 mass % or more.

Abstract: To provide a water-soluble hyaluronic acid gel which does not contain a large amount of an organic solvent, wherein hyaluronic acid is not chemically modified. A water-soluble hyaluronic acid gel which contains hyaluronic acid, a polyhydric alcohol, an acid, and 0-10% by mass of a water-soluble organic solvent.