Propylene Glycol, USP

USP and food grade propylene glycol at 99.5% minimum.

Typical uses

• Heat transfer fluid in food plants, breweries, and HVAC systems
• Freeze protection where ethylene glycol is prohibited
• Humectant and carrier in personal care and food
• Pharmaceutical excipient, at USP grade
• De-icing and anti-icing formulations

Propylene or ethylene

Ethylene glycol transfers heat somewhat better and costs less. Propylene glycol is far less toxic and is the required choice anywhere a leak could reach food, potable water, or people — which is most food plants, most breweries, and any HVAC loop in an occupied building.

Where the code or the customer specification allows either, the cost difference rarely justifies the risk. Where it does not allow either, the specification decides.

Inhibited or uninhibited

Glycol supplied plain will not protect a metal loop from corrosion. Inhibited grades carry a corrosion inhibitor package and a dye for leak detection. Tell us which your system needs — an uninhibited fill in a steel system is a slow, expensive mistake.