Colfosceril Palmitate is a major phospholipid constituent and primary surface tension lowering component of natural lung surfactant. Colfosceril Palmitate is used as pulmonary surfactant and diagnostic aid (fetal lung maturity).pH:4.5-6.5Infrared Spectrum:Conforms to structureFatty acid:≥99%Impurities (HPTLC):Individual: ≤0.2%Total: ≤0.3%Water (Karl Fisher):≤5%Storage and Stability: Store at 4ºC. Stable for 6 months after receipt.