The present invention concerns a dialysis acid precursor composition for use during preparation of a dialysis acid concentrate solution and for mixing with water, a sodium containing concentrate, and a bicarbonate containing concentrate into a ready-for-use dialysis solution. Said dialysis acid precursor composition consists of powder components comprising glucose, at least one dry acid and at least one magnesium salt, and optionally potassium salt, and calcium salt. According to the invention said glucose and said at least one magnesium salt, are present as anhydrous components in said dialysis acid precursor composition.本發明關於一種透析酸前驅物組成物,其係供透析酸濃縮物溶液的製備期間使用及用於與水、含鈉之濃縮物及含碳酸氫鹽之濃縮物混合成即用型透析溶液。該透析酸前驅物組成物係由包含葡萄糖、至少一種乾酸及至少一種鎂鹽與隨意的鉀鹽及鈣鹽之粉末組分所組成。根據本發明,該葡萄糖及該至少一種鎂鹽係呈無水組分存在於該透析酸前驅物組成物中。