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Propylene Glycol

Other Names: Methylethylene glycol, methyl glycol
Formula: CH
3CHOHCH2OH
Sp. Gr.: 1.04
Viscosity: From 10 to 100 cPs.

Remarks: Colorless, viscous, stable, hygroscopic liquid. Miscible with water, alcohols and many organic solvents. b.p. 187°C / 369°F, vapor pressure 0.07 mm @ 20°C / 68°F, flash point (open cup) 107°C / 225°F. Used in making polyester resins, anti-freeze solutions; used as a solvent for fats, oils, waxes, resins, perfumes. Serves as a hygroscopic agent; lubricant in refrigeration machines, plasticizer, cosmetics, solvent in foods, as a wetting agent, an emulsifier and as an animal feed additive.

Pump Notes: Cast iron construction is satisfactory. Buna n elastomers are recommended as is a mechanical shaft seal.