| 摘要 |
<p>Provided are a dentifrice composition which comprises ascorbic acid phosphate ester or a salt thereof having outstanding stability, has a good feel when used, and has decreased buccal irritation during use and after use, and a method for stabilizing ascorbic acid phosphate ester or a salt thereof in the dentifrice composition, wherein ascorbic acid phosphate ester or a salt thereof is maintained stable over time at a pH of 8.0 or less. The dentifrice composition contains (A) ascorbic acid phosphate ester or a salt thereof, and includes (B) a silica-based abrasive and (C) an alkali metal salt selected from sodium chloride, potassium chloride, sodium sulphate, and potassium sulphate, and the dentifrice composition has a pH at 25°C of 6.0-8.0. The method for stabilizing ascorbic acid phosphate ester or a salt thereof in the dentifrice composition comprises mixing constituent (B) and also constituent (C) in the dentifrice composition containing constituent (A), and making the pH at 25°C to be 6.0-8.0.</p> |
