Patent ID: 9617298
Date: 2017-04-11
CPC Classifications: A61K,A61Q,C07K,C08H,C08J,C08L

Claim:
1. A collagen powder and/or a collagen derivative powder, which are obtained by dispersing in a hydrophilic organic solvent a crude collagen precipitate which comprises 12 to 50% by mass of a collagen precipitate and/or a collagen derivative precipitate having an average particle size of 1 to 1,000 μm, prepared by salt precipitation or isoelectric precipitation of solubilized collagen and/or solubilized collagen derivative, recovering solids and then drying the solids to obtain the collagen powder and/or the collagen derivative powder, wherein the collagen powder and/or collagen derivative powder have an initial dissolution rate of not less than 0.2 mg/min. in a pH 6.5 solution comprising 5 mg of the collagen powder and/or the collagen derivative powder.