Propylene glycol is a clear, colorless and hygroscopic liquid. Propylene glycol contains an asymmetrical carbon atom, so it exists in two stereoisomers. The freezing point of water is depressed when mixed with propylene glycol due to increased opportunity for hydrogen bonding.
Propylene glycol is a solvent in many pharmaceuticals, including oral, injectable and topical formulations, such as for diazepam and lorazepam that are insoluble in water, use propylene glycol as a solvent in their clinical, injectable forms. It is also used as automotive antifreeze.
Key Applications: Solvent
Application Areas: Molecular biology
Product Type: Solvents
Chemical Class: Polar
Density: 1.04 g/cm3 at 20°C (Lit.)
Specific Gravity: 1.038 at 20°C (lit.)
Auto Ignition: 400°C at 1013 hPa (Lit.)
Boiling Point: 187.9°C at 1013 hPa(Lit.)
Melting Point: -60°C (Lit.)
Vapor Density: 2.62 (air = 1) (Lit.)
Vapor Pressure: .11 hPa at 20°C (Lit.)
Refractive Index: 1.433 (lit.)
Presentation: Liquid
Solubility: Soluble in water.
Storage & Handling: Store at room temperature. Store dessicated.