Inhibited ethylene glycol concentrate

DOWTHERM SR-1 Alternative

An inhibited ethylene glycol concentrate, plus ready-mixed premixes, for the same chiller, HVAC and process loops. Blended and shipped from Taylor, Texas, with a certificate of analysis on every lot.

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01

The short answer

Quick answer

DOWTHERM SR-1 is Dow's inhibited ethylene glycol concentrate (about 95.5% EG) with a phosphate-based, silicate-free inhibitor, dyed for leak detection. Our 100% Ethylene Glycol Inhibited is an ethylene glycol concentrate for the same chiller, HVAC and process loops, and we also sell it ready-mixed at 30% to 50%. Our inhibitor is a nitrite-containing hybrid organic-acid package and the fluid is undyed, so it is an alternative, not an identical fluid.

Industrial chiller plant and dry coolers on a concrete pad with Alliance Chemical IBC totes and a pallet of ethylene glycol drums
02

What to order

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

Concentrate

100% Ethylene Glycol Inhibited

Inhibited ethylene glycol concentrate for site blending with deionized water. Pails, drums and IBC totes.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
Ready-mixed 50/50

Inhibited Ethylene Glycol 50/50 with OAT-908

50% ethylene glycol already blended with deionized water and inhibitor, for outdoor and freeze-exposed loops.

Freeze point: approx. -34 °C (-29 °F) typical; -32.5 °C (-27 °F) max, at 50 wt% ethylene glycol · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDSSDS
Ready-mixed 40/60

Inhibited Ethylene Glycol 40/60 with OAT-908

40% ethylene glycol premix for chillers and dry coolers that do not need 50% protection.

Freeze point: approx. -22 °C (-8 °F) typical; -21 °C (-6 °F) max, at 40 wt% ethylene glycol · 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 DOWTHERM SR-1

What Dow and its distributors publish about the fluid.

GlycolEthylene glycol concentrate, about 95.5% by weight
InhibitorPhosphate-based industrial inhibitors, silicate-free
ColorDyed fluorescent pink for leak detection
UseDiluted with water for chillers, HVAC and process cooling

Source: Dow DOWTHERM SR-1 specification (with distributor specification sheets).

04

Side by side

DOWTHERM SR-1 compared with our 100% Ethylene Glycol Inhibited

Property DOWTHERM SR-1 (published) Alliance 100% EG Inhibited Comparison
Glycol Ethylene glycol Ethylene glycol Same
Form Concentrate, about 95.5% EG Concentrate, 98 to 100% EG by weight including under 2% inhibitor Same
Inhibitor Phosphate-based Nitrite-containing hybrid organic-acid package Different
Dye Fluorescent pink Undyed Different
Ready-mixed option Separate premix products 30/70, 35/65, 40/60 and 50/50 premixes with deionized water Same

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

05

Questions

Is there a DOWTHERM SR-1 equivalent?

Several suppliers sell inhibited ethylene glycol concentrates for the same loops. Ours is an alternative with a different inhibitor package (nitrite-containing hybrid organic acid, undyed), not an identical fluid, so check it against your system's fluid specification.

Can I mix your ethylene glycol with DOWTHERM SR-1 already in the loop?

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

Why buy a premix instead of concentrate?

A premix arrives at the right strength, blended with deionized water, so there is no risk of mixing with tap water or getting the ratio wrong on site.

Is it dyed?

No, it is clear and undyed.

Quote a fill

Tell us the site, the number of totes or the system volume, and the date the coolant has to be on site. We reply with pricing, freight and lead time.

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DOWFROST, DOWTHERM and DOWCAL are trademarks of The Dow Chemical Company or an affiliated company. Alliance Chemical is not affiliated with Dow, and our products are not Dow products. Comparisons use Dow's and its distributors' published information; confirm against the current data sheets and your system's fluid specification before switching.