PROPYLENE GLYCOL Inhibited
Ready-to-use inhibited propylene glycol for reliable closed-loop cooling and heat transfer
Inhibited Propylene Glycol 40/60 is a ready-to-use aqueous heat-transfer fluid containing 40% v/v propylene glycol in deionized water and a hybrid OAT (organic-acid technology) corrosion inhibitor package. It is supplied as a clear, colorless liquid and provides freeze protection to ≤ -22°C and burst protection to ≤ -38°C. The formulation is designed for closed-loop heat-transfer applications where corrosion control and reliable thermal performance are important, including HVAC chillers, hydronic systems, secondary-loop food and beverage cooling, data-center liquid cooling, and glycol-charged process cooling.
Product Identification
| CAS | 57-55-6 |
| INCI | Propylene Glycol |
Technical Specifications
| Property | Specification |
|---|---|
| Appearance | Clear, colorless liquid (or fluorescent dye if specified) |
| Odor | Mild, slightly sweet |
| Specific Gravity at 20 ℃ | 1.034 - 1.038 |
| Density at 25 C | ~1.032 g / cm3 |
| pH (as supplied) | 8.5 - 10.5 |
| Reserve Alkalinity | 6 - 10 mL 0.1 N HCI |
| Freeze Point | <= -22 ℃ (-7°F) |
| Burst Protection | <=- 38 ℃ (-37 °F) |
| Boiling Point at 760 mm Hg | >= 102 °C (>=215 °F) |
| Refractive Index at 20 ℃ | 1.359 - 1.365 |
| Viscosity at 40 °C | 1.9 - 2.3 cP |
| Viscosity at 100 ℃ | ~0.70 cP |
| Specific Heat at 20 ℃ | 0.91 Btu / Ib-°F (3.81 kJ / kg-K) |
| Thermal Conductivity at 50 C | 0.40 - 0.44 W / m-K |
| Vapor Pressure at 20 ℃ | ~14 mm Hg |
| Solubility in Water | Completely miscible |
| Flash Point | Non-flammable as supplied (water-rich blend) |
Why Choose Our PROPYLENE GLYCOL Inhibited
Ready-to-Use Cooling Solution
The 40/60 formulation combines propylene glycol, deionized water, and an OAT-based hybrid corrosion inhibitor package in a ready-to-use blend. This simplifies system charging while providing a controlled glycol concentration for closed-loop cooling and heat-transfer applications
- 40% v/v propylene glycol concentration
- Ready-to-use formulation
- Deionized-water based blend
- Designed for closed-loop heat-transfer systems
- Suitable for HVAC and process cooling applications
Corrosion Control Across Multi-Metal Systems
The OAT inhibitor package is formulated around corrosion protection for systems containing multiple metal surfaces. Documented ASTM D1384 coupon results show PASS results against ASTM D3306 limits for copper, solder, brass, steel, cast iron, and aluminum.
- Hybrid OAT corrosion-inhibitor technology
- Protection across multiple metal types
- Copper and brass protection supported by the formulation
- Suitable for systems with aluminum components
- ASTM D3306 corrosion limits addressed
Built for Practical Closed-Loop Operation
The formulation combines defined freeze and burst protection with controlled physical properties and established maintenance guidance. Under design operating conditions, typical closed-loop service life is 5+ years, with annual fluid analysis recommended to monitor system condition.
- Freeze point ≤ -22°C
- Burst protection ≤ -38°C
- Complete miscibility with water
- Annual fluid analysis recommended
- 5+ years typical service life under suitable conditions
Applications
Reliable Cooling for HVAC Chiller Systems
Inhibited Propylene Glycol 40/60 is designed for closed-loop HVAC chiller and hydronic applications where freeze protection and corrosion control are important. Its ready-to-use formulation supports glycol-charged systems operating with multiple wetted metals and components.
Secondary-Loop Cooling for Food & Beverage Facilities
The product can be used in secondary-loop cooling systems serving food and beverage processing operations. Its application is specifically suited to indirect cooling systems rather than direct food-contact applications.
Liquid Cooling for Data Centers
For data-center liquid cooling systems, the formulation provides a glycol-based heat-transfer medium with defined freeze and burst protection. Its corrosion-inhibitor package is designed for systems containing a range of metal components.
Glycol-Charged Process Cooling
The 40/60 blend supports industrial process-cooling systems requiring a ready-to-use propylene glycol heat-transfer fluid. Its combination of controlled glycol concentration and corrosion-inhibitor technology makes it suitable for closed-loop process cooling applications.
Closed-Loop Hydronic Heat Transfer
The formulation is suited to closed-loop hydronic systems where heat-transfer performance and protection against freezing are required. Complete water miscibility and defined thermal properties support practical use in glycol-charged circulation systems.
Freeze & Burst Protection for Cooling Systems
The product provides freeze protection to ≤ -22°C and burst protection to ≤ -38°C, helping closed-loop cooling systems operate in low-temperature conditions. It can be used where glycol-based protection is required as part of a properly designed heat-transfer system
Industries
- HVAC & Cooling
- Industrial Manufacturing
- Hydronic Systems
- Food & Beverage
- Heat Transfer