Propylene Glycol 35/65 OAT Coolant

Name: Quick Facts: Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant
Creator: Alliance Chemical
License: https://alliancechemical.com/policies/terms-of-service

Product quick facts

CAS 57-55-6C3H8O2

Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant (CAS 57-55-6) is a 35% Inhibited-grade liquid with molecular formula C3H8O2 and a molecular weight of 76.09 (propylene glycol) g/mol. Alliance Chemical supplies this product in 7 container sizes from 1 Quart to 330 Gallon (16 pack options) with 1-2 business day shipping from Taylor, TX on in-stock orders, plus SDS and lot-specific Certificate of Analysis.

Pack sizes 7 container sizes (1 Quart to 330 Gallon) · 16 pack options
Purity / spec 35% Inhibited
Lead time In-stock orders placed by Mon-Thu 2 PM CT / Fri 12 PM CT typically ship within 1-2 business days.
Regional availability View state-by-state shipping pages

Request Bulk Quote (512) 365-6838

Quick Answer

What is Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant used for, and what should buyers verify before ordering?

Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant is supplied at 35% in Inhibited grade . Buyers should confirm pack size, grade, SDS, COA needs, and freight requirements before purchase.

Assay: 35%
Grade: Inhibited

Technical Documents

Live, always-current documents. Need the Certificate of Analysis for your lot? Just ask, no charge.

Who Buys This

Data center operators
Facility maintenance teams
HVAC and cooling contractors
Industrial cooling system managers

Purity / Grade Guide

Data center coolant applications
OAT inhibitor formulated blend
Industrial cooling system use
COA on request, no charge

Pack Sizes

1 Quart: small jobs & top-off
1 Gallon: shop & maintenance
5 Gallon: production & regular use
15 Gallon: mid-volume operations
55 Gallon: bulk drum
275 Gallon: high-volume tote
330 Gallon: max-volume tote

Small Packs: UPS Ground nationwide for pints, quarts, and gallons.

LTL / FTL: ABF, SEFL, Saia, XPO, and partner carriers for pails, drums, totes, and full truckloads.

Support: Email or call for freight options, hazardous-material routing, and lead-time confirmation.

Description
Product Documents
Chemical Profile

Inhibited Propylene Glycol 35/65 with OAT Corrosion Inhibitor is a ready-to-use closed-loop heat-transfer fluid blended at our Taylor, TX facility: 35% propylene glycol by weight in deionized water with a nitrite-containing hybrid organic-acid (OAT) corrosion inhibitor package. The package combines sodium nitrite, sodium molybdate, sodium benzoate and triethanolamine with organic-acid inhibitors, formulated for steel, cast iron, copper, brass and solder.

Applications

Data center direct-to-chip (DTC) cold-plate secondary loops
Coolant distribution unit (CDU) technology cooling system (TCS) loops
Rear-door heat exchanger loops
HVAC chillers & hydronic heating loops
Food & beverage processing chillers (secondary loop, indirect)
Freeze protection for outdoor and exposed piping

Specifications

Composition: propylene glycol 34.5–35.5% by weight (w/w); corrosion inhibitor package 1.8–2.2%; deionized water balance
CAS: 57-55-6 (PG), 7732-18-5 (Water); product is a mixture
Nitrite (as NO₂): 840 ppm min.
Specific gravity (20°C): 1.031–1.039 (calculated)
Density: approx. 1.03 g/mL (8.6 lb/gal)
pH: reported on the lot Certificate of Analysis (typically 7.0–9.0)
Reserve alkalinity: reported on the lot COA
Freeze point: approx. 2 °F (-16 °C); specification 4 °F (-15.6 °C) max
Boiling point: approx. 217 °F (103 °C)
Appearance: clear, colorless to pale yellow liquid; not dyed (dye available on request)

Documentation

Lot-specific Certificate of Analysis (COA) on request
Branded Technical Data Sheet (TDS)
Safety Data Sheet (SDS)

Handling

Not classified as hazardous under GHS and not regulated for transport by DOT. Contains sodium nitrite: install as a fresh fill after draining and flushing, do not mix with phosphate-, silicate- or nitrite-free coolants, keep away from strong acids, and avoid galvanized (zinc) surfaces. Refer to the Safety Data Sheet (SDS) for full handling information.

Available sizes: 1 quart through 330-gallon IBC tote. Bulk tanker quoted on request.

Not for: direct or incidental food contact, potable water, open recirculation, automotive crankcase, or single-pass cooling.

Frequently Asked Questions About Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant

What makes this Alliance Chemical Inhibited Propylene Glycol 35/65 different from standard PG?

It is a pre-blended 35% by weight (w/w) propylene glycol in deionized water, charged with a nitrite-containing hybrid organic-acid (OAT) corrosion inhibitor package, 2.0 wt% of the blend (1.8–2.2%): sodium nitrite, triethanolamine, sodium benzoate and sodium molybdate plus organic-acid inhibitors. It is blended in Taylor, Texas, and is not dyed. Contains sodium nitrite: install as a fresh fill after draining and flushing, do not mix with phosphate-, silicate- or nitrite-free coolants, keep away from strong acids, and avoid galvanized (zinc) surfaces.

Is this product suitable for food and beverage chiller loops?

Only for indirect (secondary) loops where the fluid cannot contact product. This blend contains sodium nitrite and is not a food-contact product: it is not for direct or incidental food contact or potable water. See the SDS for full handling information.

What metals and elastomers is it compatible with?

The inhibitor package is formulated for steel, cast iron, copper, brass and solder. Compatible plastics and elastomers include polypropylene, HDPE, PVC, CPVC, PVDF, PTFE, PES, NBR (Buna-N), EPDM, FKM, HNBR, VMQ silicone, neoprene, and CSM. Not recommended for prolonged contact with natural rubber or magnesium alloys. Contains sodium nitrite: install as a fresh fill after draining and flushing, do not mix with phosphate-, silicate- or nitrite-free coolants, keep away from strong acids, and avoid galvanized (zinc) surfaces.

What is the freeze point of 35/65?

At 35% propylene glycol by weight, the typical freeze point is approx. 2 °F (-16 °C); the specification is 4 °F (-15.6 °C) max. For colder service, request a higher ratio.

What water do I use for top-up and make-up?

Use only deionized or distilled water (less than 50 microsiemens/cm conductivity, less than 25 ppm chloride, less than 25 ppm sulfate). Tap or hard water introduces calcium and magnesium scale plus chloride that will accelerate pitting and shorten inhibitor life.

Why 35/65 rather than a stronger blend?

A 35% propylene glycol / 65% deionized water mix sits between the 30% indoor standard and the 40% freeze-protection blends. It suits loops with some outdoor exposure that still need good thermal performance — dry coolers, rooftop piping, and mixed indoor/outdoor circuits.

What is Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant and what is its chemical formula?

Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant is listed under CAS 57-55-6 (PubChem reference search). The catalog formula is C3H8O2. The listed molecular weight is 76.09 (propylene glycol) g/mol. For solutions and blends, identity values may describe a constituent; consult the product SDS for composition.

What are the physical properties of Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant?

Catalog reference information for Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant: form: Liquid; reference values may describe a pure substance rather than the supplied concentration or blend. Confirm applicable conditions and specifications in the product documents; these values are not batch test results.

What grade and purity of Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant does Alliance Chemical offer?

Alliance Chemical lists Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant in Inhibited grade with a concentration or assay of 35%. Check the product specification for the measurement basis and acceptance limits. A grade label alone does not establish certification or suitability for a regulated application. For batch results, request a COA using the product name and lot number.

What are common industrial applications of Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant?

To evaluate it for your process, compare the listed grade, concentration and product specifications with your requirements. Contact Alliance Chemical to confirm any application-specific documentation or certification before ordering.

What are the hazards of Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant and where do I find handling guidance?

Per its GHS classification (SDS Section 2), Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant the following hazard statements: NOT CLASSIFIED AS HAZARDOUS UNDER OSHA HCS / GHS.. Product-specific first aid, fire-fighting, spill response, handling, storage, exposure controls/PPE, and disposal guidance are in SDS Sections 4-8 and 13 — always consult the SDS before use. Download the SDS.

How must Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant waste be disposed?

Consult SDS Section 13 for disposal information for Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant. Disposal requirements depend on the resulting waste, contamination and location. Have your site's responsible waste professional determine the appropriate waste classification and disposal method. View the SDS.

Does Alliance Chemical provide an SDS and COA for Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant?

Search the document library for Inhibited Propylene Glycol 35/65 with OAT Inhibitor — Data Center Coolant. The SDS is also available here. A sample COA describes specifications and does not establish the results for your shipment. To request a lot-specific COA or confirm document availability, contact Alliance Chemical with the product name and lot number.