Patent ID: 6602859
Filing Date: 2003-08-05
Classification: C08B

Abstract:
A photocurable hyaluronic acid derivative comprising hyaluronic acid and a photoreactive crosslinking group bonded thereto, wherein a 1.0 wt. % aqueous solution of the photocurable hyaluronic acid derivative obtained by dissolving a solid photocurable hyaluronic acid derivative in an aqueous solvent, is capable of passing through a porous filter having a pore size of 0.45 &mgr;m and a diameter of 25 mm at a rate of not less than 2 ml/minute at 24Â° C. under a pressure of 5.0 Kg/cm2wherein the photoreactive crosslinking group is derived from cinnamic acid, substituted cinnamic acid or derivatives thereof.