| 摘要 |
PROBLEM TO BE SOLVED: To provide a depolymerized hyaluronic acid, a salt thereof, and a production method suitable for the industrial production thereof. SOLUTION: The depolymerization of a hyaluronic acid or a salt thereof is carried out in specific acid-concentration and at a specific temperature, by considering not only the molecular weight and color but also the molecular structure. The depolymerized hyaluronic acid or the salt thereof can be produced suitably for the industrial production without causing the change in its color to brown. COPYRIGHT: (C)2009,JPO&INPIT
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