CAS Registry Number: 52-90-4 Molecular Formula: C3 H7 N O2 S Molecular Weight: 121.16 Purity: HPLC more than 98% Melting Point (Experimental)Value: 240 degrees centigrade (decomp) Boiling Point (Predicted)Value: 293.9 more or less 35.0 degrees centigrade | Condition: Press: 760 Torr Density (Experimental)Value: 1.6666 g/cm3 | Condition: Temp: 45.00 degrees centigrade pKa (Predicted)Value: 2.07 more or less 0.10 | Condition: Most Acidic Temp: 25 degrees centigrade Storage: 2-8 degrees centigrade, keep container tightly in a dry place, out of light.