lansoprazole CAS NO.: 103577-45-3 Molecular Formula: C16H14F3N3O2S Molecular Weight: 369.36 Density:1.5 g/cm3 Melting Point:178-182 °C Boiling Point:555.8 °C at 760 mmHg Flash Point:289.9 °C Purity:≥99% Appearance:white crystalline powder. Storage Temperature: 2-8°C Usage: Used as a gastric proton pump inhibitor. An antiulcerative.