PROBLEM TO BE SOLVED: To provide a dialysis agent containing at least magnesium chloride as an electrolyte composition, each of the contained components of which is charged in a vessel as a single solid component, which is improved in fluidity of the magnesium chloride when charging the magnesium chloride in the vessel, which is suppressed in solidification and coagulation of medicinal substance in the vessel at a storage stage, and which is prevented from degrading glucose even when containing the glucose as a carbohydrate.SOLUTION: The dialysis agent includes an electrolyte composition at least containing magnesium chloride, the balanced relative humidity of the magnesium chloride at 25°C is 2%RH or less and each of the contained components is charged in a vessel as a single solid component.COPYRIGHT: (C)2013,JPO&INPIT【課題】電解質成分として少なくとも塩化マグネシウムを含み、各含有成分が単一の固体成分として容器に充填された透析用剤において、塩化マグネシウムを容器に充填する際の塩化マグネシウムの流動性を改善し、保管段階においては、容器内での薬剤の固結、凝集が抑制され、さらに糖質成分としてブドウ糖を含む場合でもブドウ糖の分解が防止される透析用剤を提供する。【解決手段】少なくとも塩化マグネシウムを含む電解質成分を含有し、塩化マグネシウムの25℃における平衡相対湿度が2RH%以下であり、各含有成分が単一の固体成分として容器に充填されている透析用剤である。【選択図】なし