CAS: 10039-54-0 EC No: 233-118-8 MDL No: MFCD00044869 RTECS: NC5425000 UN No: UN2865; Haz Class: 8; Packing Group: III Crystalline Linear Formula: NH₂OH·0.5H₂SO₄ MW: 164.14 Melting Point: 170° (decomposes) Density (g/mL): 1.88