Product Name:Levothyroxine sodium CAS:55-03-8 MF:C15H20I4NNaO9 MW:888.93 EINECS:200-221-4 Mol File:55-03-8.mol Melting point:207-210 (dec.)(lit.) alpha D20 -4.4° (c = 3 in 70% ethanol) Density d420 2.381 storage temp. 2-8°C