Inhibited Ethylene Glycol 30/70 with OAT-908 — Data Center Coolant
Premium 30% inhibited ethylene glycol coolant engineered for data centers, hyperscale direct-liquid cooling (DLC) loops, edge-compute thermal management, HVAC chillers, and industrial closed-loop heat-transfer systems. Pre-blended at 30% v/v ethylene glycol in deionized water with the OAT-908 hybrid corrosion-inhibitor package. Conforms to ASTM D3306 industrial coolant corrosion limits. 5+ year closed-loop service life under design conditions.
What is OAT-908?
OAT-908 is a hybrid Organic Acid Technology (OAT) corrosion-inhibitor package that combines aliphatic organic acids with selective inorganic synergists (sodium nitrite, sodium molybdate, sodium benzoate) to deliver simultaneous protection of copper, brass, mild steel, cast iron, aluminum, and lead-tin solder in a single fluid. The hybrid chemistry reduces silicate and phosphate fouling risk relative to legacy IAT and HOAT formulations and is well-suited to modern multi-metal data-center cooling loops.
Why data-center engineers specify Alliance Chemical's Inhibited EG 30/70 OAT-908
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5+ year closed-loop service life with annual fluid analysis (reserve alkalinity, pH, refractive index)
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ASTM D3306 conformance across the full ASTM D1384 six-metal coupon stack — copper, solder, brass, steel, cast iron, and aluminum
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Hybrid OAT inhibitor reduces heat-exchanger fouling vs. silicate/phosphate IAT formulations
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Elastomer-compatible with NBR (Buna-N), EPDM, FKM (Viton), HNBR, VMQ silicone, neoprene (CR), and CSM (Hypalon) — fits common pump-seal and gasket materials
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Freeze protection to −15°C (5°F) at the supplied 30/70 dilution; concentrate available for custom freeze-point targets
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Made in the USA — blended at our Taylor, Texas facility under documented batch-control procedures with lot-specific Certificate of Analysis
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Non-DOT-regulated — ships standard freight without hazmat surcharge
Performance
Engineered for the same closed-loop applications as premium industrial inhibited ethylene glycol coolants — chilled-water and condenser-water loops, DLC and rear-door heat exchangers, HVAC chiller systems, hydronic process cooling, and freeze / burst protection. Conforms to ASTM D3306 industrial coolant corrosion limits across the same six-metal ASTM D1384 coupon stack used to benchmark long-running inhibited glycol formulations.
Typical specifications (30/70 blend)
| Property |
Typical Value |
Method |
| Specific Gravity at 20°C |
1.040 – 1.045 |
ASTM D1298 |
| pH (as supplied) |
8.5 – 10.0 |
ASTM D1287 |
| Reserve Alkalinity |
7 – 10 mL 0.1 N HCl |
ASTM D1121 |
| Freeze Point |
≤ −15°C (5°F) |
ASTM D1177 |
| Boiling Point |
≥ 102°C (215°F) |
ASTM D1120 |
| Refractive Index at 20°C |
1.354 – 1.358 |
ASTM D1747 |
| Viscosity at 40°C |
1.5 – 2.0 cP |
ASTM D445 |
| Thermal Conductivity at 50°C |
0.42 – 0.46 W/m·K |
ASHRAE 2017 ch.31 |
| Specific Heat at 20°C |
0.92 Btu/lb·°F (3.85 kJ/kg·K) |
ASHRAE 2017 ch.31 |
Typical applications
- Hyperscale data-center cooling loops — chilled-water, condenser-water, and direct-liquid cooling (DLC)
- Edge-compute and modular data-center thermal management
- Liquid-cooled GPU / AI compute clusters — rear-door heat exchangers and CDU loops
- HVAC and commercial chiller systems — freeze and burst protection in unconditioned spaces
- Industrial process cooling — plastics molding, brewing, food & beverage
- Solar thermal and geothermal closed-loop heat transfer
- Boiler and hydronic heating loop freeze protection
Compatibility
Compatible with copper, brass, mild steel, cast iron, stainless steel (304/316), aluminum (3003, 6061), lead-tin solder, polypropylene, HDPE, PVC, PVDF, PTFE, NBR, EPDM, FKM (Viton), HNBR, VMQ silicone, neoprene, and CSM. Not recommended for prolonged contact with natural rubber, magnesium alloys, or zinc-galvanized surfaces.
Documentation & lot traceability
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Technical Data Sheet (TDS) — available in the Product Documents tab
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Safety Data Sheet (SDS) — available in the Product Documents tab
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Certificate of Analysis (COA) — lot-specific, issued with every shipment
Pack sizes
Available in 1 Quart, 1 Gallon, 5 Gallon pail, 15 Gallon HDPE drum, 55 Gallon HDPE drum, 4 x 55 Gallon Drum pallet, 275 Gallon IBC tote, and 330 Gallon IBC tote — from sample / bench-test quantities up to bulk pallet and IBC orders. Multi-pack and pallet-quantity options available at every size break. For tanker-volume orders please contact sales@alliancechemical.com directly.
Maintenance & make-up
Use only deionized or distilled water (less than 50 µS/cm conductivity, < 25 ppm chloride, < 25 ppm sulfate) for top-up and make-up. Tap or hard water introduces calcium / magnesium scale and chloride that will accelerate pitting and shorten inhibitor life. Annual fluid analysis is recommended; replace fluid when reserve alkalinity falls below 5.0 mL or pH drops below 7.0.
Pet-safety note: ethylene glycol is highly toxic to dogs, cats, and wildlife if ingested. Clean up spills immediately and store containers out of reach of animals. See the SDS for full hazard, first-aid, and disposal guidance.
