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Product Overview
50% Propylene Glycol Technical Grade (PG) is a pre-mixed, clear, colorless liquid solution comprised of Propane-1,2-diol and deionized water. This concentration is optimized for immediate use in industrial thermal management, acting as a reliable heat transfer fluid and antifreeze in closed-loop systems. With a chemical formula of C₃H₈O₂, it offers low toxicity and excellent hygroscopic properties.
While this product meets rigorous purity standards with alignment to USP-NF monographs, it is designated as Technical Grade for industrial applications. It features precise assay control (50 wt%) to ensure consistent freeze protection and viscosity profiles. The solution is widely utilized as a coolant in chillers, a solvent in paints and coatings, and a humectant in chemical processing. Its low vapor pressure and lack of corrosive properties make it safe for handling in standard carbon steel, stainless steel, or polyethylene equipment.
Key Properties
- CAS: 57-55-6
- Appearance: Clear, colorless liquid
- Odor: Odorless to slightly sweet
- Molecular Formula: C₃H₈O₂
- Density (25°C): ~1.036 g/mL
- Freezing Point: Approx -34°C (-29°F) at 50% concentration
- Solubility: Completely miscible in water
- Grade: Technical Grade
Common Applications
- Heat Transfer Fluid: Serves as a primary coolant and antifreeze in HVAC chillers, solar thermal systems, and geothermal loops to prevent freezing and burst pipes.
- Industrial Antifreeze: Used in automotive and heavy equipment cooling systems where low toxicity is required compared to ethylene glycol.
- Solvent & Carrier: Functions as a solvent for paints, coatings, and resins, improving flow and leveling properties.
- Chemical Formulation: Acts as a feedstock or processing aid in the manufacturing of polymer resins and industrial lubricants.
- De-icing Agent: Applied in non-aircraft de-icing operations for industrial machinery and surfaces.
Safety & Handling
Store 50% Propylene Glycol in a cool, well-ventilated area away from direct sunlight and strong oxidizing agents. Compatible storage materials include stainless steel, aluminum, and polyethylene. While PG is generally considered low-toxicity, standard industrial hygiene practices should be observed. Wear safety glasses and gloves during handling to prevent skin or eye irritation. In the event of a spill, contain the liquid and dispose of it according to local regulations.
Benefits
Ready-to-Use Concentration – Pre-mixed 50% solution eliminates the need for on-site dilution for many chiller applications.
Freeze Protection – Provides effective burst protection for pipes and systems in sub-freezing environments.
Corrosion Inhibition – Naturally non-corrosive to most metals, extending the lifespan of industrial equipment.
Versatile Utility – High purity allows for use across heating, cooling, and manufacturing sectors.
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