CAS: 1313-84-4 EC No: 215-211-5 MDL No: MFCD00149184 RTECS: WE1925000 UN No: UN1849; Haz Class: 8; Packing Group: II Crystalline Molecular Formula: Na₂S·9H₂O MW: 240.18 Melting Point: 50° (decomposes) Density (g/mL): 1.427