Inhibited propylene glycol for HVAC, hydronic and process loops

RECOFREEZE Alternative

Inhibited propylene glycol premixes and concentrate, matched to RECOFREEZE strengths 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

RECOFREEZE PG is Recochem's inhibited propylene glycol heat-transfer fluid, sold as a concentrate (92% glycol by weight minimum) and pre-diluted, with freeze protection published by percent glycol by volume. RECOFREEZE AL 50/50 is a premixed, pH-neutral propylene glycol for aluminum boilers and heat exchangers, with an additive package Recochem states is free of nitrite. Our inhibited propylene glycol premixes are named by percent by weight and contain nitrite, so match on freeze point, not on the number in the name, and treat ours as an alternative, not the same fluid.

02

What to order

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

For 10 °F protection

Inhibited Propylene Glycol 30/70 with OAT Inhibitor

30% propylene glycol by weight, freezing at about 9 °F, which covers RECOFREEZE PG at 28% by volume (10 °F).

Freeze point: approx. -13 °C (9 °F) at 30 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
For 0 °F protection

Inhibited Propylene Glycol 40/60 with OAT Inhibitor

40% propylene glycol by weight, freezing at about -6 °F, which covers RECOFREEZE PG at 36% by volume (0 °F).

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
For RECOFREEZE AL 50/50 (-24 °F)

Inhibited Propylene Glycol 50/50 with OAT Inhibitor

50% propylene glycol by weight, freezing at about -28 °F, colder than AL 50/50's -24 °F. Ours contains nitrite; AL 50/50 is stated nitrite-free.

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 -30 °F and -40 °F protection

Propylene Glycol 60% Inhibited

60% propylene glycol by weight, freezing at about -60 °F. Our 50/50 freezes at about -28 °F, slightly warmer than RECOFREEZE PG at 50% by volume (-30 °F).

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

96/4 inhibited propylene glycol concentrate for site blending with deionized water, or blended by us to the freeze point you need, such as -60 °F.

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 RECOFREEZE

What Recochem publishes about the fluids.

RECOFREEZE PGPropylene glycol concentrate, 92.0% glycol by weight minimum, 8.0% maximum inhibitors and water; also sold pre-diluted
Food plantsC.F.I.A. approved for non-contact use in federally registered food establishments (Canada)
Freeze tableFreeze protection by percent glycol by volume, for example 50% by volume to -30 °F
RECOFREEZE AL 50/50Premixed propylene glycol for aluminum boilers and heat exchangers; pH 7.0 to 8.5; 46.0% glycol by weight minimum; yellow
AL inhibitorFree of amine, borate, nitrate, nitrite, phosphate and silicate; freeze point -31 °C (-24 °F), burst protection to -60 °C

Matched by freeze point

RECOFREEZE Glycol (their basis) Their freeze point Our match Our freeze point
PG, 18%
18% by volume
20 °F
Inhibited Propylene Glycol 20/80 with OAT Inhibitor
19 °F (20% by weight)
PG, 28%
28% by volume
10 °F
Inhibited Propylene Glycol 30/70 with OAT Inhibitor
9 °F (30% by weight)
PG, 36%
36% by volume
0 °F
Inhibited Propylene Glycol 40/60 with OAT Inhibitor
-6 °F (40% by weight)
PG, 42% and 47%
42 and 47% by volume
-10 °F and -20 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F (50% by weight)
PG, 50% and 55%
50 and 55% by volume
-30 °F and -40 °F
Propylene Glycol 60% Inhibited
-60 °F typical, -58 °F max (60% by weight)
PG, 62%
62% by volume
-60 °F
Blended to order from 100% Propylene Glycol Inhibited
Set to your freeze point
PG concentrate
92% glycol by weight minimum
—
100% Propylene Glycol Inhibited
Concentrate, for site blending
AL 50/50
46% glycol by weight minimum
-24 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F (50% by weight)

Source: Recochem RECOFREEZE PG Fluids sell sheet (freeze and burst protection table, with the RECOFREEZE AL 50/50 data sheet).

04

Side by side

RECOFREEZE compared with our inhibited propylene glycol line

Property RECOFREEZE (published) Alliance inhibited PG Comparison
Glycol
Propylene glycol
Propylene glycol
Same
Forms
Concentrate and pre-diluted
96/4 concentrate; 20% to 60% premixes with deionized water
Same
Strength naming
Percent by volume (freeze table)
Percent by weight
Different
Inhibitor
Inhibitor package, type not named (PG); amine-, borate-, nitrate-, nitrite-, phosphate- and silicate-free package (AL)
Nitrite-containing hybrid organic-acid package
Different
Nitrite
Not stated (PG); free of nitrite (AL)
Contains nitrite (not for nitrite-free specifications)
Different
Food plants
C.F.I.A. approved for non-contact use (PG)
Not food grade. Not for food contact or potable water
Different
AL 50/50 freeze point (-24 °F)
-24 °F
PG 50/50 premix at -28 °F
Meets
Aluminum boilers
AL 50/50 formulated for aluminum boilers and heat exchangers
Check the boiler or heat exchanger maker's fluid specification before use
Different
Color
Yellow (AL)
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 replaces RECOFREEZE AL 50/50?

On freeze point, our Inhibited Propylene Glycol 50/50 with OAT Inhibitor, at about -28 °F against AL 50/50's -24 °F. The chemistry is different: Recochem states AL 50/50 is nitrite-free and pH neutral for aluminum boilers, and ours contains nitrite. Check your boiler or heat exchanger maker's fluid specification before switching.

Is your propylene glycol nitrite-free?

No. Our inhibited propylene glycol contains nitrite. We do not sell a nitrite-free propylene glycol. If your equipment, cold plate or CDU loop calls for a nitrite-free fluid, check the maker's fluid specification before using ours.

Can I top up a RECOFREEZE system with your fluid?

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

Why don't the percentages line up?

Recochem's freeze table is percent glycol by volume. Our premixes are percent by weight. Pick the strength from your coldest fluid temperature, not from the number in the name.

Can I use your propylene glycol in a food plant?

No. Ours is not food grade and is not for food contact or potable-water protection.

Can you add dye?

Yes. 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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RECOFREEZE and RECOFREEZE AL are trademarks of Recochem Inc. Alliance Chemical is not affiliated with Recochem or its distributors, and our products are not RECOFREEZE products. Comparisons use Recochem's published information; confirm against the current data sheet and your system's fluid specification before switching.