Inhibited propylene glycol concentrate

KOSTChill PG HD Alternative

An inhibited propylene glycol concentrate for the same HVAC, chiller 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

KOSTChill PG HD is KOST USA's heavy-duty inhibited propylene glycol concentrate for HVAC and chiller loops, diluted on site to 25 to 70%. Our 100% Propylene Glycol Inhibited does the same job: about 96% propylene glycol with a 4% corrosion-inhibitor package, diluted with deionized water to the freeze point you need. The inhibitor packages differ (ours contains nitrite) and ours is undyed, so it is an alternative, not an identical fluid.

HVAC chiller plant room with insulated chilled-water piping, pumps and valves, with Alliance Chemical IBC totes and drums of propylene glycol concentrate on the floor
02

What to order

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

Concentrate

100% Propylene Glycol Inhibited

Inhibited propylene glycol concentrate (96/4) for site blending with deionized water. Pails, drums and IBC totes.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet
Ready-mixed 30/70

Inhibited Propylene Glycol 30/70 with OAT Inhibitor

8.4 °FFreeze point
typical · 30 vol% propylene glycol

30% propylene glycol already blended with deionized water and inhibitor, for indoor loops.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet
Dilution water

Deionized Water ACS Reagent Grade

Conductivity under 1 µS/cm for diluting the concentrate without adding chloride or hardness.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing Technical data sheetSafety data sheet

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

03

About KOSTChill PG HD

What KOST USA publishes about the fluid.

GlycolInhibited propylene glycol concentrate
DilutionUsed at 25 to 70% in water
InhibitorHeavy-duty package; composition not published
ColorDyed pink

Source: KOST USA KOSTChill PG HD product sheet.

04

Side by side

KOSTChill PG HD compared with our 100% Propylene Glycol Inhibited

Property KOSTChill PG HD (published) Alliance 100% PG Inhibited Comparison
Glycol
Propylene glycol
Propylene glycol
Same
Form
Concentrate, diluted 25 to 70%
Concentrate, 95.6 to 96.4% PG by weight; dilute to the freeze point you need
Same
Inhibitor
Heavy-duty package, composition not published
3.6 to 4.4% nitrite-containing hybrid organic-acid package
Different
Dye
Pink
Undyed, clear
Different
Ready-mixed option
Not stated
20/80 to 50/50 premixes with deionized water
Different

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 your inhibited propylene glycol the same as KOSTChill PG HD?

No. Both are inhibited propylene glycol concentrates for HVAC and chiller loops, but the inhibitor packages differ and ours is undyed. Treat it as an alternative and check it against your system's fluid specification.

Can I top up a KOSTChill loop with your product?

Do not mix inhibitor chemistries. Drain, flush with deionized water and refill when you change fluids.

Is it nitrite-free?

No. Our propylene glycol inhibitor package contains nitrite.

What concentration should I dilute to?

Use the lowest concentration that covers your coldest fluid temperature plus margin: about 30% protects to roughly -13 °C (9 °F), 50% to roughly -33 °C (-28 °F).

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