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Dow Dowfrost is an inhibited propylene glycol heat transfer fluid in Dow's Dowtherm series. Designed for closed-loop thermal management systems such as low-temperature cold chain, high-precision equipment cooling and air conditioning refrigeration, it is an efficient low-temperature heat transfer medium with extreme corrosion protection and stable low-temperature performance
Extreme Corrosion Protection - Extremely low corrosion rate on carbon steel and other metals, greatly reducing equipment maintenance costs
Wide Low-Temperature Adaptation - Excellent anti-freezing performance, suitable for diverse low-temperature working conditions, good low-temperature fluidity
Stable Heat Transfer Efficiency - Stable heat transfer efficiency and strong thermal stability, ensuring accurate temperature control
Excellent System Compatibility - Highly compatible with closed-loop system materials, suitable for various refrigeration and heat transfer equipment
Industrial Cold Chain Field - Used in cold storage and ice storage systems to maintain a stable low-temperature storage environment
Precision Equipment Field - Suitable for cooling high-precision equipment such as laser machines and data communication equipment to ensure constant temperature operation
Air Conditioning Refrigeration Field - Used as low-temperature coolant for central air conditioning to improve refrigeration efficiency and system stability
Food Industry Field - Applied in food processing cold chain equipment, meeting the safety and hygiene requirements of the food industry
| Chemical Type | Inhibited Propylene Glycol |
| English Name | Dowfrost™ Inhibited Propylene Glycol Coolant |
| CAS No. (Main Component) | 57-55-6 |
| Main Component | Propylene Glycol (with special corrosion inhibitor) |
| Physical Form | Colorless transparent liquid |
| Corrosion Rate (25%-28% Aqueous Solution, Carbon Steel) | 1/200 of pure water, 1/1000 of ordinary propylene glycol |
Q1: What is the primary function of Dow Dowfrost Propylene Glycol in heat transfer systems?
A: Dow Dowfrost Propylene Glycol serves as a non-toxic, low-freezing-point heat transfer fluid base, commonly blended with water to provide freeze protection, corrosion inhibition, and thermal stability in closed-loop HVAC, refrigeration, and industrial cooling systems.
Q2: Is Dow Dowfrost Propylene Glycol suitable for use in food processing or pharmaceutical environments?
A: Yes — Dow Dowfrost Propylene Glycol is manufactured to meet USP/EP-grade purity specifications and is widely accepted for incidental contact applications in food, beverage, and pharmaceutical facilities where non-toxicity and regulatory compliance are essential.
Q3: How does Dow Dowfrost Propylene Glycol compare to ethylene glycol-based coolants in terms of safety and environmental impact?
A: Unlike ethylene glycol, propylene glycol exhibits significantly lower acute toxicity and is readily biodegradable, making it preferred for applications requiring reduced environmental hazard potential and enhanced operator safety — especially in facilities with open systems or risk of leakage near sensitive areas.
Q4: Can Dow Dowfrost Propylene Glycol be mixed with other glycol-based heat transfer fluids?
A: Mixing with other glycols or additives is not recommended unless validated through system-specific compatibility testing, as unintended interactions may compromise thermal performance, corrosion protection, or long-term fluid stability.
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