| abstract |
Provided is a hyaluronic acid and/or a salt thereof having an average molecular weight of 3,500 or less, a proportion of disaccharide of 1 mass% or more and 30 mass% or less, a content of chlorine of 1 mass% or less, a content of sulfur of 1 mass% or less, and a bulk density of more than 0.25 g/cm 3 . |