DOW DOWFROST inhibited propylene glycol heat transfer fluid — 208L steel drum, UAE stock

DOW — Inhibited Glycol Heat Transfer Fluids

DOWFROST™ Inhibited Propylene Glycol

DOWFROST & DOWFROST HD | –45°C to 160°C | UAE Stock

DOWFROST™ fluids are inhibited propylene glycol-based heat transfer fluids for low-temperature, water-based closed-loop systems. Both grades contain specially formulated packages of industrial corrosion inhibitors that protect system metals and extend equipment life.

Because propylene glycol carries low acute oral toxicity — against the moderate acute oral toxicity of ethylene glycol — DOWFROST fluids are the usual specification wherever a leak could reach product, people or potable water. The inhibitor packages are long-lasting and replenishable, extending the interval between fluid change-outs and lowering total cost of ownership.

Two Grades Available

DOWFROST

–45°C to 120°C. 96% propylene glycol with specially formulated packages of industrial inhibitors that help prevent corrosion. Because propylene glycol fluids have low acute oral toxicity, DOWFROST is often used in applications where contact with food or beverage products could occur. Dow lists it for secondary heating and cooling, freeze and burst protection of pipes, and deicing, defrosting and dehumidifying.

DOWFROST HD

–45°C to 160°C. 94% propylene glycol with a specially designed package of industrial corrosion inhibitors and higher reserve alkalinity (15.0 ml min). Dyed bright fluorescent yellow to aid leak detection. Dow lists it for single-fluid process heating and cooling, closed-loop duty, and water-based HVAC where propylene glycol is preferred or required.

Supplied as concentrate or pre-diluted to your required concentration, from Abu Dhabi with fast dispatch across the UAE, Saudi Arabia, Kuwait, Qatar, Bahrain and Oman.

Grade

Concentration

Pack Size

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DOWFROST™ vs DOWFROST™ HD — Typical Properties

The deciding questions are top-end temperature and whether a leak could reach food or beverage product. DOWFROST HD runs 40°C hotter and carries a stronger inhibitor package and a leak-detection dye; DOWFROST is the grade Dow positions for potential food or beverage contact.

Property	DOWFROST Food Grade	DOWFROST HD Heavy Duty Industrial
Product Type	Inhibited propylene glycol-based heat transfer fluid
Propylene Glycol (% by weight)	96	94
Performance Additives (% by weight)	4	6
Colour	Colourless	Fluorescent yellow (dyed for leak detection)
Recommended Use Range	–45°C to 120°C (–50°F to 250°F)	–45°C to 160°C (–50°F to 325°F)
Specific Gravity 15/15°C (60/60°F)	1.050–1.060	1.053–1.063
pH of Solution (50% glycol)	9.0–10.0	9.5–10.5
Reserve Alkalinity (min.)	10.0 ml	15.0 ml
Freeze Protection	To below –50°C (–60°F)	To below –50°C (–60°F)
Burst Protection	To below –73°C (–100°F)	To below –73°C (–100°F)
Inhibitor Adjustment Required Below	30% glycol	20% glycol
Maximum Attainable Glycol Concentration	96%	94%
Acute Oral Toxicity	Low — versus moderate for ethylene glycol fluids
Dow-Stated Applications	Secondary heating and cooling; freeze and burst protection of pipes; deicing, defrosting and dehumidifying	Single fluid process heating and cooling; closed-loop; water-based HVAC where propylene glycol is preferred or required
Availability (UAE)	Concentrate or pre-diluted — enquire for stock position

Values taken from Dow technical data sheets 180-01314-1019 (DOWFROST) and 180-01315-1019 (DOWFROST HD). Typical properties, not to be construed as specifications; complete sales specifications are available on request. Operating range varies with glycol concentration.

Concentration Required for Freeze & Burst Protection

Freeze protection keeps the fluid pumpable; burst protection only prevents the pipe splitting — the fluid may still slush. Note how much less glycol burst protection needs, which matters when you are balancing heat transfer efficiency against cold-weather risk.

Temperature °C (°F)	DOWFROST (Vol %)		DOWFROST HD (Vol %)
Temperature °C (°F)	Freeze	Burst	Freeze	Burst
–7 (20)	18.8	12.6	19.1	12.8
–12 (10)	30.4	20.9	30.9	21.3
–18 (0)	37.7	25.1	38.3	25.5
–23 (–10)	44.0	29.3	44.7	29.8
–29 (–20)	48.2	31.4	48.9	31.9
–34 (–30)	52.4	34.6	53.2	35.1
–40 (–40)	56.5	36.6	57.4	37.2
–46 (–50)	59.7	36.6	60.6	37.2
–51 (–60)	62.8	36.6	63.8	37.2

Dow advises selecting a temperature at least 3°C (5°F) lower than the expected lowest ambient for an extended margin of protection. Inhibitor levels must be adjusted below 30% glycol for DOWFROST and below 20% for DOWFROST HD. These are typical figures, not specifications.

Freezing & Boiling Points by Concentration

Applies to both grades. Refractive index is included for field verification of concentration with a handheld refractometer.

Wt % Propylene Glycol	Freezing Point °C (°F)	Boiling Point °C (°F)	Refractive Index @ 22°C
20.0	–7.1 (19.2)	100.6 (213)	1.3555
25.0	–9.6 (14.7)	101.1 (214)	1.3615
30.0	–12.7 (9.2)	102.2 (216)	1.3675
35.0	–16.4 (2.4)	102.8 (217)	1.3733
40.0	–21.1 (–6.0)	103.9 (219)	1.3790
45.0	–26.7 (–16.1)	104.4 (220)	1.3847
50.0	–33.5 (–28.3)	105.6 (222)	1.3903
55.0	–41.6 (–42.8)	106.1 (223)	1.3956
60.0	–51.1 (–59.9)	107.2 (225)	1.4008
65.0	Below –50	108.3 (227)	1.4058
70.0	Below –50	110.0 (230)	1.4104
80.0	Below –50	118.3 (245)	1.4193
90.0	Below –50	132.2 (270)	1.4275

Saturation Properties by Concentration

DOWFROST values at 30%, 40% and 50% propylene glycol by volume — the figures needed for pump sizing and heat exchanger duty. DOWFROST HD values differ slightly; refer to its data sheet below.

DOWFROST at 30% Propylene Glycol by Volume

Temp. °C (°F)	Specific Heat kJ/kg·K	Density kg/m³	Therm. Cond. W/m·K	Viscosity mPa·s
–10 (50)	3.821	1033.71	0.4344	4.5068
40 (104)	3.903	1019.56	0.4622	1.6295
65 (149)	3.972	1004.26	0.4771	0.9144
90 (194)	4.041	985.77	0.4846	0.6040
120 (248)	4.123	959.35	0.4838	0.4246

DOWFROST at 40% Propylene Glycol by Volume

Temp. °C (°F)	Specific Heat kJ/kg·K	Density kg/m³	Therm. Cond. W/m·K	Viscosity mPa·s
–20 (–4)	3.569	1053.16	0.3635	48.9043
10 (50)	3.668	1042.14	0.3936	7.2173
40 (104)	3.768	1026.49	0.4150	2.2389
65 (149)	3.850	1009.90	0.4262	1.1762
90 (194)	3.933	990.10	0.4313	0.7462
120 (248)	4.032	962.08	0.4294	0.5084

DOWFROST at 50% Propylene Glycol by Volume

Temp. °C (°F)	Specific Heat kJ/kg·K	Density kg/m³	Therm. Cond. W/m·K	Viscosity mPa·s
–30 (–22)	3.339	1064.83	0.3246	172.8273
–20 (–4)	3.378	1061.71	0.3336	73.0193
10 (50)	3.493	1049.25	0.3560	10.6481
40 (104)	3.609	1032.17	0.3716	3.1103
65 (149)	3.706	1014.40	0.3792	1.5483
90 (194)	3.802	993.42	0.3821	0.9339
120 (248)	3.918	964.00	0.3792	0.6029

Technical Data Sheets

Official Dow technical data sheets — full freezing and boiling point tables, saturation properties by concentration, and corrosion inhibitor guidance.

Why Specify DOWFROST™

Formulated Inhibitor Packages

Specially formulated industrial inhibitor packages help prevent corrosion across system metals, with reserve alkalinity of 10.0 ml on DOWFROST and 15.0 ml minimum on DOWFROST HD.

Low Acute Oral Toxicity

Propylene glycol carries low acute oral toxicity against the moderate toxicity of ethylene glycol — the safer specification wherever a leak could reach people, product or potable water.

Replenishable Inhibitor Package

Inhibitors are long-lasting and can be topped up rather than requiring a full change-out, extending fluid life and cutting the cost of maintaining a closed loop.

Corrosion & Scale Protection

Formulated inhibitors protect system metals including copper against the corrosion and scaling that raise operating cost, cut efficiency and lead to system failure.

Leak Detection Dye (HD)

DOWFROST HD is dyed fluorescent yellow-green so leaks are found fast during operation and maintenance rather than after damage is done.

Supplied to Your Concentration

Available as concentrate or pre-diluted to the concentration your lowest ambient demands — removing on-site mixing and the water-quality risk that can compromise the inhibitor package.

Typical Applications

HVAC chilled water loops

Hydronic heating

Food & beverage processing

Dairy facilities

Breweries & fermentation cooling

Cold storage & refrigerated warehouses

Supermarket secondary loops

Geothermal / ground source heat pumps

Solar hot water systems

Thermal energy storage (TES)

Fire sprinkler systems

Ice rinks & immersion freezing

Frequently Asked Questions

What is the difference between DOWFROST and DOWFROST HD?

DOWFROST is 96% propylene glycol with 4% performance additives, rated -45°C to 120°C, and is the grade used where contact with food or beverage products could occur. DOWFROST HD is 94% propylene glycol with 6% performance additives and a specially designed industrial corrosion inhibitor package, rated to a higher 160°C, with reserve alkalinity of 15.0 ml against 10.0 ml. HD is dyed bright fluorescent yellow for leak detection and is the usual choice for closed-loop and water-based HVAC duty.

Is DOWFROST safe for food processing applications?

Dow states that because propylene glycol fluids have low acute oral toxicity, DOWFROST propylene glycol-based fluids are often used in applications where contact with food or beverage products could occur. DOWFROST HD contains a package of industrial corrosion inhibitors and is not positioned for food contact duty. For any application involving potential food or potable water contact, confirm the current regulatory status directly with Dow before specifying.

Why choose propylene glycol over ethylene glycol?

Propylene glycol has low acute oral toxicity compared with the moderate acute oral toxicity of ethylene glycol. In food processing, potable water systems, occupied buildings and anywhere a leak could reach people or product, propylene glycol is the safer specification.

What concentration of DOWFROST do I need?

Concentration is set by the lowest temperature the system will see. Higher glycol percentages give deeper freeze and burst protection but reduce heat transfer efficiency and increase viscosity. Dow recommends selecting for a temperature at least 3°C below the expected lowest ambient. Inhibitor levels need adjusting below 30% glycol for DOWFROST and below 20% for DOWFROST HD, so weaker dilutions should be discussed before use.