PROBLEM TO BE SOLVED: To provide a pharmaceutical container composed of borosilicate glass which has high mechanical strength and can sufficiently endure destruction in ordinary use.SOLUTION: There is provided a pharmaceutical container composed of borosilicate glass, which contains, as a glass composition in terms of mass%, 70 to 80% of SiO2, 5.8 to 10% of Al2O3, 5 to 15% of B2O3, 3 to 10% of Na2O, 0.4 to 2.3% of K2O, 0 to 5% of CaO and 0 to 3% of BaO, in which a compressive stress layer is formed by ion exchange treatment at least on the outer surface of the container.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】機械的強度が高く、通常使用での破壊に十分耐え得るホウ珪酸ガラスからなる医薬品容器を提供する。【解決手段】ガラス組成として、質量%で、SiO2 70~80%、Al2O3 5.8~10%、B2O3 5~15%、Na2O 3~10%、K2O 0.4~2.3%、CaO 0~5%、BaO 0~3%含有するホウ珪酸ガラスからなり、少なくとも容器の外表面にイオン交換処理による圧縮応力層が形成されていることを特徴とする。【選択図】なし
