Inhibited propylene and ethylene glycol for data center and process loops

Dynalene Alternative

Inhibited glycol premixes and concentrates, matched to each Dynalene strength 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

Dynalene's PG-D series (PG-D15, PG-D25, PG-D55) are pre-diluted USP propylene glycol coolants for direct-to-chip data center loops, and its PG-A1 and EG-A1 are OAT-based, aluminum-safe glycols sold as premixes named by percent by volume. Dynalene also sells EG and PG heat transfer fluids and low electrical conductivity LC-EG and LC-PG fluids. Our inhibited glycol premixes are named by percent by weight, so match on freeze point, not on the number in the name. Our inhibitor packages are different from Dynalene's and our propylene glycol contains nitrite, 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 PG-D25 and PG-A1 25% (14 °F)

Inhibited Propylene Glycol 30/70 with OAT Inhibitor

30% propylene glycol by weight, freezing at about 9 °F, which covers the 14 °F of PG-D25 and PG-A1 25%. Our 25/75 premix freezes at about 15 °F, slightly warmer.

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 PG-D15 (23 °F)

Inhibited Propylene Glycol 20/80 with OAT Inhibitor

20% propylene glycol by weight, freezing at about 19 °F, colder than PG-D15's 23 °F.

Freeze point: approx. -7 °C (19 °F) at 20 wt% propylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
For PG-A1 50% (-31 °F)

Propylene Glycol 60% Inhibited

60% propylene glycol by weight, freezing at about -60 °F. Our 50/50 premix freezes at about -28 °F, slightly warmer than PG-A1 50%, so this is the stock premix that covers it.

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
For EG-A1 40%

Inhibited Ethylene Glycol 40/60, Nitrite-Free

41-44% ethylene glycol by weight with a benzoate package, freezing at about -13 °F typical and -10 °F max. Check it against the freeze point your system needs.

Freeze point: approx. -25 °C (-13 °F) typical; -23 °C (-10 °F) max, at 41-44 wt% ethylene glycol (ASTM D1177) · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
PG 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 for PG-D55.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
EG concentrate, or blended to order

100% Ethylene Glycol Inhibited

Inhibited ethylene glycol concentrate for site blending, or blended by us to the freeze point you need, such as for EG-A1 50%.

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 Dynalene

What Dynalene publishes about the fluids.

PG-D seriesUSP propylene glycol, water and a proprietary inhibitor package (plus biocide in PG-D15); fluorescent green; for direct-to-chip and CDU loops
PG-D freeze pointsPG-D15 23 °F, PG-D25 14 °F (burst -1 °F); Dynalene prints no freeze point for PG-D55
PG-A1 and EG-A1OAT-based, multi-component inhibitor for aluminum systems; PG-A1 is red, EG-A1 is yellow; sold as premixed solutions
Grade namesPG-A1 and EG-A1 strengths are percent by volume, with the weight percent printed alongside; PG-D numbers are nominal percent propylene glycol
LC-EG and LC-PGLow electrical conductivity ethylene and propylene glycol fluids

Matched by freeze point

Dynalene grade Glycol (their basis) Their freeze point Our match Our freeze point
PG-D15
Nominal 15% USP propylene glycol
23 °F
Inhibited Propylene Glycol 20/80 with OAT Inhibitor
19 °F (20% by weight)
PG-D25
Nominal 25% USP propylene glycol
14 °F
Inhibited Propylene Glycol 30/70 with OAT Inhibitor
9 °F (30% by weight)
PG-D55
Nominal 55% USP propylene glycol
Not published
Blended to order from 100% Propylene Glycol Inhibited
Set to your freeze point
PG-A1 25%
25% by volume (25.9% by weight)
14 °F
Inhibited Propylene Glycol 30/70 with OAT Inhibitor
9 °F (30% by weight)
PG-A1 30%
30% by volume (31.1% by weight)
8 °F
Inhibited Propylene Glycol 35/65 with OAT Inhibitor
2 °F (35% by weight)
PG-A1 40%
40% by volume (41.2% by weight)
-8 °F
Inhibited Propylene Glycol 50/50 with OAT Inhibitor
-28 °F (50% by weight)
PG-A1 50%
50% by volume (51.2% by weight)
-31 °F
Propylene Glycol 60% Inhibited
-60 °F typical, -58 °F max (60% by weight)
EG-A1 25%
25% by volume (27.3% by weight)
Match by freeze point
Inhibited Ethylene Glycol 30/70 with OAT-908
7 °F typical, 8 °F max (30% by weight)
EG-A1 30%
30% by volume (32.6% by weight)
Match by freeze point
Inhibited Ethylene Glycol 35/65 with OAT-908
0 °F typical, 1 °F max (35% by weight)
EG-A1 40%
40% by volume (42.9% by weight)
Match by freeze point
Inhibited Ethylene Glycol 40/60, Nitrite-Free
-13 °F typical, -10 °F max (41-44% by weight)
EG-A1 50%
50% by volume (53.0% by weight)
Match by freeze point
Blended to order from 100% Ethylene Glycol Inhibited
Set to your freeze point
Dynalene EG, PG, LC-EG, LC-PG
Not published
Not published
Blended to order from our inhibited concentrates (not low-conductivity)
Set to your freeze point

Source: Dynalene PG-D Series technical data sheet (with the Dynalene PG-A1 and EG-A1 technical data sheets and Dynalene's data center product page).

04

Side by side

Dynalene compared with our inhibited glycol line

Property Dynalene (published) Alliance inhibited glycol Comparison
Glycol
USP propylene glycol (PG-D); propylene or ethylene glycol (A1 series)
Propylene or ethylene glycol; our inhibited premixes are not sold as USP or food grade
Different
Strength naming
Percent by volume (A1 series); nominal percent (PG-D)
Percent by weight
Different
Inhibitor
Proprietary package (PG-D); OAT-based multi-component package (A1 series)
Nitrite-containing hybrid organic-acid package (OAT premixes); benzoate package (EG 40/60 Nitrite-Free)
Different
Nitrite
Not stated
Contains nitrite, except our EG 40/60 Nitrite-Free; we have no nitrite-free propylene glycol
Different
PG-D25 freeze point (14 °F)
14 °F
PG 30/70 premix at 9 °F
Meets
Low electrical conductivity (LC-EG, LC-PG)
Offered
Not offered
Does not meet
Color
Fluorescent green (PG-D), red (PG-A1), yellow (EG-A1)
Undyed; green or purple leak-detection dye can be added
On request
Cold plate and CDU loops
PG-D formulated for direct-to-chip cooling
Check the equipment maker's fluid specification before use
Different

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 Dynalene PG-D25?

Our Inhibited Propylene Glycol 30/70 with OAT Inhibitor, at about 9 °F against PG-D25's 14 °F. Our 25/75 premix freezes at about 15 °F, which is 1 °F warmer than PG-D25, so we point PG-D25 users to the 30/70 or a blend made to order.

Is your propylene glycol nitrite-free?

No. Our inhibited propylene glycol contains nitrite. We do not sell a nitrite-free propylene glycol; our only nitrite-free product is the Inhibited Ethylene Glycol 40/60, Nitrite-Free. Check your cold plate, CDU or server maker's fluid specification before using any of our fluids in a direct-to-chip or CDU loop.

Can I top up a Dynalene system with your fluid?

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

Why don't the percentages line up?

Dynalene names PG-A1 and EG-A1 by percent by volume and prints the weight percent beside it. Our premixes are percent by weight. Each PG-D and PG-A1 match above freezes at least as cold as Dynalene's published figure; for EG-A1, pick our premix from the freeze point your system needs. Pick the strength from your coldest fluid temperature, not from the number in the name.

Do you sell a low-conductivity glycol like Dynalene LC?

No. Our inhibited glycols are not low-conductivity fluids. If your system calls for a low electrical conductivity coolant, ours is not a fit.

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