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 TDSSDS
Ready-mixed 30/70

Inhibited Propylene Glycol 30/70 with OAT Inhibitor

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

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
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 TDSSDS

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

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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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.