Inhibited propylene glycol for chilled-water, hydronic and secondary refrigeration loops

Freez-Kontr'l Alternative

Inhibited propylene glycol premixes and concentrate, matched to each Freez-Kontr'l product by freeze point. Blended and shipped from Taylor, Texas, with a certificate of analysis on every lot.

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01

The short answer

Quick answer

Freez-Kontr'l is Nu-Calgon's line of inhibited propylene glycol heat-transfer fluids: Freez-Kontr'l 35 and Freez-Kontr'l 50 are ready-to-use premixes, and Freez-Kontr'l (70% propylene glycol) and Freez-Kontr'l 95/5 (95%) are concentrates. Freez-Kontr'l 35 freezes at +2 °F and Freez-Kontr'l 50 at -25 °F. Our 35/65 premix freezes at about 2 °F typical and our 50/50 premix at about -28 °F. Our inhibitor is a nitrite-containing hybrid organic-acid package, not Nu-Calgon's phosphate, so this is an alternative, not the same fluid.

02

What to order

The products that fit this spec, and what each one is for.

For Freez-Kontr'l 35 (+2 °F)

Inhibited Propylene Glycol 35/65 with OAT Inhibitor

35% propylene glycol by weight premix at the same +2 °F typical freeze point as Freez-Kontr'l 35. Our guaranteed maximum is 4 °F; for margin, use our 40/60.

Freeze point: approx. -16 °C (2 °F) at 35 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
For Freez-Kontr'l 50 (-25 °F)

Inhibited Propylene Glycol 50/50 with OAT Inhibitor

50% by weight premix that freezes at about -28 °F typical, colder than Freez-Kontr'l 50.

Freeze point: approx. -33 °C (-28 °F) at 50 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
For 0 to -3 °F mixes

Inhibited Propylene Glycol 40/60 with OAT Inhibitor

40% by weight premix at about -6 °F typical, colder than Freez-Kontr'l at 50% and 95/5 at 40%.

Freeze point: approx. -21 °C (-6 °F) at 40 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
Our coldest premix

Propylene Glycol 60% Inhibited

60% by weight premix at about -60 °F typical, colder than 95/5 at 60% (-51 °F). Freez-Kontr'l undiluted is rated below -60 °F, so check this against your design temperature.

Freeze point: approx. -51 °C (-60 °F) at 60 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
Concentrate, or blended to order

100% Propylene Glycol Inhibited

Inhibited propylene glycol concentrate for site blending with deionized water, or blended by us to the freeze point you need.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS

Need a different concentration? We blend to the freeze point you specify, in pails, drums and 275- or 330-gallon totes.

03

About Freez-Kontr'l

What Nu-Calgon publishes about the fluids.

GlycolPropylene glycol: 35% and 50% premixes in deionized water; 70% (Freez-Kontr'l) and 95% (95/5) concentrates
InhibitorDipotassium phosphate (Freez-Kontr'l, Freez-Kontr'l 35); type not named in the 50 and 95/5 bulletins
Grade namesThe number is percent propylene glycol, not a temperature. Dilution charts are percent by volume of the Freez-Kontr'l product
RatingsEach product is rated for both freeze and burst protection: Freez-Kontr'l 35 is +2 °F freeze, -32 °F burst; Freez-Kontr'l 50 is -25 °F freeze, -95 °F burst
ColorBlue (Freez-Kontr'l, 35 and 50)
Food contactGRAS ingredients, for use where incidental contact with food or potable water could occur

Matched by freeze point

Freez-Kontr'l product Their freeze point Their burst point Our closest Our freeze point Note
Freez-Kontr'l 35 (premix)
+2 °F
-32 °F
Inhibited Propylene Glycol 35/65 with OAT Inhibitor
2 °F typical, 4 °F max
Same typical; our max is 2 °F warmer. Our 40/60 (-6 °F) is colder
Freez-Kontr'l 50 (premix)
-25 °F
-95 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F typical, -27 °F max
Colder
Freez-Kontr'l, undiluted (70% PG)
Below -60 °F
-100 °F
Propylene Glycol 60% Inhibited
-60 °F typical, -58 °F max
Gap: rated below -60 °F; ours is -60 °F typical
Freez-Kontr'l at 70%
-29 °F
-100 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F typical, -27 °F max
About 1 °F warmer; blended to order from concentrate if you need -29 °F
Freez-Kontr'l at 50%
-1 °F
-52 °F
Inhibited Propylene Glycol 40/60 with OAT Inhibitor
-6 °F typical, -5 °F max
Colder
95/5 at 60%
-51 °F
-100 °F
Propylene Glycol 60% Inhibited
-60 °F typical, -58 °F max
Colder
95/5 at 50%
-24 °F
-95 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F typical, -27 °F max
Colder
95/5 at 40%
-3 °F
-62 °F
Inhibited Propylene Glycol 40/60 with OAT Inhibitor
-6 °F typical, -5 °F max
Colder
Freez-Kontr'l 95/5 concentrate
Below -60 °F
-100 °F
100% Propylene Glycol Inhibited
Concentrate
For site blending; mix by freeze point, not by Nu-Calgon's dilution chart

Source: Nu-Calgon Product Bulletin 3-72, Freez-Kontr'l (and Product Bulletins 3-79 (Freez-Kontr'l 35), 3-6 (Freez-Kontr'l 50) and 3-76 (Freez-Kontr'l 95/5) on nucalgon.com).

04

Side by side

Freez-Kontr'l compared with our inhibited propylene glycol line

Property Freez-Kontr'l (published) Alliance inhibited propylene glycol Comparison
Glycol
Propylene glycol
Propylene glycol
Same
Forms
35% and 50% premixes; 70% and 95% concentrates
20/80 to 60% premixes with deionized water; 96% concentrate
Same
Strength naming
Percent propylene glycol; dilution charts by volume of product
Percent propylene glycol by weight
Different
Burst protection
Published for each product and dilution
Not published; we design to freeze point
Not tested
Inhibitor
Dipotassium phosphate (Freez-Kontr'l, Freez-Kontr'l 35)
Nitrite-containing hybrid organic-acid package
Different
Food and potable-water contact
GRAS ingredients for incidental contact
No. Not food grade; not for food contact or potable water
Different
Color
Blue
Undyed; green or purple leak-detection dye can be added
On request

Our column comes from our controlled technical data sheets and SDS. Their column comes from published sources; we do not test competitor fluids.

05

Questions

Which of your products matches Freez-Kontr'l 35?

Our Inhibited Propylene Glycol 35/65 with OAT Inhibitor, at about 2 °F typical against Freez-Kontr'l 35's +2 °F. Our guaranteed maximum is 4 °F, so if you need margin, our 40/60 at about -6 °F freezes colder.

Which of your products matches Freez-Kontr'l 50?

Our Inhibited Propylene Glycol 50/50 with OAT Inhibitor, at about -28 °F typical against Freez-Kontr'l 50's -25 °F.

What is the difference between freeze and burst protection?

Freeze point is where ice crystals start to form and the fluid stops pumping well. Burst protection is the colder temperature down to which the slush will not split the pipes, if the system is idle and has room to expand. Nu-Calgon publishes both; Freez-Kontr'l 50 is -25 °F freeze and -95 °F burst. Compare freeze point to freeze point and burst point to burst point, never one against the other. We do not publish burst ratings; we design to freeze point.

Can I use Nu-Calgon's dilution chart with your concentrate?

No. Freez-Kontr'l charts are percent by volume of a 70% or 95% propylene glycol product. Our concentrate is about 96% propylene glycol by weight, so the same percentage gives a different freeze point. Mix by freeze point and check with a propylene glycol refractometer, or let us blend it to order.

Can I top up a Freez-Kontr'l system with your fluid?

No. Do not mix inhibitor chemistries. Drain, flush with deionized water and refill.

Can I use your propylene glycol where it may contact food or drinking water?

No. Nu-Calgon sells Freez-Kontr'l for use where incidental food or potable-water contact could occur; ours is not food grade and is not for food contact or potable water.

Can you dye it blue like Freez-Kontr'l?

No. Our fluid ships undyed; green or purple leak-detection dye can be pre-mixed on request.

Quote a fill

Pricing, freight and lead time for your site

Tell us where the coolant goes, how much, and when it has to be there.

  • Priced for your volume, from pails to 330-gallon totes
  • Freight to your site from Taylor, Texas
  • Blended to the freeze point you specify, COA with every lot

Prefer to talk? (512) 365-6838

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Freez-Kontr'l is a registered trademark of Nu-Calgon. Alliance Chemical is not affiliated with Nu-Calgon or its distributors, and our products are not Freez-Kontr'l products. Comparisons use Nu-Calgon's published information; confirm against the current data sheet and your system's fluid specification before switching.