PROBLEM TO BE SOLVED: To provide dentifrice compositions containing aluminum lactate suitable for hyperesthesia inhibition, the dentifrice compositions having an excellent effect of inhibiting pH reduction simultaneously with a high effect of blocking dentinal tubule, being able to inhibit pH reduction with time, being able to suppress also metallic taste, and having excellent feel when using.SOLUTION: The invention provides a dentifrice composition characterized by compounding (A) 0.01-5 mass% of aluminum lactate, (B) 0.01-5 mass% of a condensed phosphate, and (C) 0.1-3 mass% of α-olefin sulfonate into the dentifrice composition； and a method of inhibiting pH reduction and metallic taste expression in the dentifrice composition by compounding 0.01-5 mass% of the component (A), 0.01-5 mass% of the component (B), and 0.1-3 mass% of the component (C) into the dentifrice composition.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】高い象牙細管封鎖効果を奏すると共にｐＨ低下抑制効果が優れ、経時におけるｐＨ低下が抑えられ、また、金属味が抑えられ使用感も良好な、知覚過敏抑制用として好適な乳酸アルミニウム含有の歯磨組成物を提供する。【解決手段】（Ａ）乳酸アルミニウムを０．０１～５質量％含有する歯磨組成物に、（Ｂ）縮合リン酸塩を０．０１～５質量％と、（Ｃ）α－オレフィンスルホン酸塩を０．１～３質量％とを配合したことを特徴とする歯磨組成物、及び前記（Ａ）成分を０．０１～５質量％含有する歯磨組成物に、（Ｂ）成分を０．０１～５質量％と（Ｃ）成分を０．１～３質量％とを配合し、前記歯磨組成物におけるｐＨ低下と金属味の発現を抑制する方法。【選択図】なし
