Barium hydroxide octahydrate, min. 98 %, extra pure, Molar mass (M) 315,48 g/mol, Density (D) 2,18 g/cm³, CAS No. [12230-71-6], UN-Nr. 3262, EG-Nr. 241-234-5, Empirical formula Ba(OH)2 · 8 H2O