CAS 107-21-1 · Diol
Ethylene Glycol
Monoethylene Glycol (MEG) · C₂H₆O₂ · MW 62.07 g/mol
The most widely used industrial glycol — a colorless, odorless, water-miscible diol with excellent freeze-point depression and heat transfer properties. Ethylene glycol is the backbone of automotive antifreeze, the primary monomer for PET polyester, and a critical fluid in HVAC and gas processing systems. Texas-Chem supplies EG in drums, totes, and bulk.
Formula
C₂H₆O₂
Boiling Point
197.3 °C
Solubility
Fully water-miscible
Pack Sizes
Drums · Totes · Bulk
Structural Formula
Vicinal diol — two hydroxyl groups on adjacent carbons enable hydrogen bonding and full water miscibility
Safety & Regulatory
- NFPA Health
- 1 — Slight hazard
- NFPA Flammability
- 1 — Slight hazard
- NFPA Reactivity
- 0 — Stable
- OSHA PEL (TWA)
- 50 ppm (ceiling, vapor)
- ACGIH TLV (TWA)
- 25 ppm (vapor)
- DOT Hazard Class
- Not regulated (bulk)
- UN Number
- Not assigned
- Toxicity
- Toxic if ingested — keep from food/feed
Toxic to animals if ingested — store away from food and feed. Always consult the current Safety Data Sheet before handling.
Grades & Packaging
Available Grades
Pack Sizes
Physical & Chemical Properties
| Molecular Formula | C₂H₆O₂ |
| Molecular Weight | 62.07 g/mol |
| CAS Number | 107-21-1 |
| Boiling Point | 197.3 °C (387.1 °F) |
| Melting Point | −12.9 °C (8.8 °F) |
| Flash Point | 111 °C (232 °F) — Combustible |
| Density | 1.113 g/cm³ at 20 °C |
| Vapor Pressure | 0.008 kPa at 20 °C |
| Solubility in Water | Miscible in all proportions |
| Viscosity | 16.1 mPa·s at 25 °C |
| Refractive Index | 1.4318 at 20 °C |
| Auto-ignition Temp. | 398 °C (748 °F) |
Industrial Applications
Antifreeze & Coolants
Primary active ingredient in automotive and industrial antifreeze/coolant formulations. A 50/50 EG/water mixture provides freeze protection to −37 °C and boil-over protection to 129 °C.
Polyester Fiber & PET
Key monomer in the production of polyethylene terephthalate (PET) — used to manufacture polyester fibers, films, and beverage bottles. Accounts for the majority of global EG consumption.
HVAC & Heat Transfer
Heat transfer fluid in chilled water systems, geothermal loops, and industrial process cooling. Inhibited EG formulations provide corrosion protection for metal systems.
Aircraft De-icing
Active component in aircraft de-icing and anti-icing fluids (Type I and Type II). Prevents ice formation on wings and fuselage surfaces.
Chemical Intermediates
Feedstock for ethylene glycol ethers (Cellosolve solvents), polyethylene glycols, and glyoxal. Used in the synthesis of explosives, resins, and pharmaceuticals.
Natural Gas Processing
Injection into natural gas pipelines to prevent hydrate formation. Also used as a dehydration agent in gas processing plants.
Why Source Ethylene Glycol from Texas-Chem?
- 35+ years supplying industrial glycols to Texas manufacturers
- Industrial, USP, and antifreeze grades available
- Flexible packaging from 55-gal drums to bulk tanker delivery
- Competitive pricing backed by top-tier producer relationships
- Technical support and SDS documentation with every order
- Same-day quotes for standard quantities
Frequently Asked Questions
What grades of ethylene glycol are available for industrial antifreeze and HVAC applications?▾
Chemical & Filtration Products of Texas supplies ethylene glycol in Industrial-grade for antifreeze, HVAC heat transfer fluids, and industrial coolant applications, sourced from Dow and BASF. Industrial-grade ethylene glycol meets performance specifications for automotive coolant, glycol-based HVAC systems, and industrial heat exchangers. Every order ships with SDS documentation and full lot traceability. Contact us at 855-TEX-CHEM for current pricing and availability.
What is the difference between ethylene glycol and propylene glycol for industrial cooling systems?▾
Ethylene glycol provides slightly better heat transfer performance and lower viscosity at cold temperatures compared to propylene glycol, making it the preferred choice for automotive and many industrial cooling systems. Propylene glycol is non-toxic and is required where incidental food contact, potable water contact, or HVAC systems serving food facilities are a concern. Ethylene glycol must not be used in food-contact applications. We supply both grades, sourced from Dow and BASF, with full documentation. Contact us at 855-TEX-CHEM to confirm the right glycol for your system.
Can I order bulk ethylene glycol for a Texas manufacturing or water treatment facility?▾
Yes. We supply ethylene glycol in quantities from single drums through full bulk tanker deliveries to manufacturers, chemical blenders, HVAC contractors, and industrial facilities across Texas. Delivery is available to Houston, Dallas-Fort Worth, San Antonio, Austin, and surrounding industrial corridors. All orders ship with SDS documentation and lot traceability. Contact us at 855-TEX-CHEM or [email protected] for a quote on your required volume.
What manufacturers supply the ethylene glycol you distribute?▾
We source ethylene glycol from Dow and BASF — two of the world's leading glycol manufacturers — ensuring consistent quality and purity specifications on every order. Manufacturer documentation accompanies every shipment, giving your quality team full traceability for incoming material verification. Contact us at 855-TEX-CHEM to confirm current manufacturer availability for your order.
What concentration of ethylene glycol is needed for freeze protection in Texas industrial applications?▾
In Texas, where temperatures rarely drop below 10°F (-12°C) even in extreme conditions, a 30-35% ethylene glycol solution in water typically provides adequate freeze protection with burst protection extending lower. For process systems with unusual requirements or sub-freezing temperatures in refrigeration applications, higher concentrations up to 50% are used. We supply ethylene glycol in bulk with consistent purity specifications so you can formulate to your exact system requirement. Contact us at 855-TEX-CHEM for guidance on concentration selection.
Is ethylene glycol used in natural gas pipeline operations in Texas?▾
Yes. Ethylene glycol (and less commonly triethylene glycol) is used in natural gas processing and pipeline operations to inhibit hydrate formation — ice-like crystalline structures that can block pipelines — and as a dehydration agent to remove water vapor from natural gas. This is a major application for ethylene glycol in the Texas oil and gas industry. We supply industrial-grade ethylene glycol for pipeline and gas processing applications with full lot traceability and SDS documentation. Contact us at 855-TEX-CHEM.
Other Glycols We Carry
Propylene Glycol (PG)
CAS 57-55-6
Diethylene Glycol (DEG)
CAS 111-46-6
Triethylene Glycol (TEG)
CAS 112-27-6
Dipropylene Glycol (DPG)
CAS 25265-71-8
From the Resources
Propylene Glycol vs. Ethylene Glycol: Industrial Buyer's Guide
Deciding between EG and PG? Compare toxicity, performance, cost, and industry-specific use cases side by side.
Ethylene Glycol vs. Alternatives
Ethylene glycol (EG) is the workhorse industrial antifreeze and heat-transfer fluid. Here's how it compares to its closest alternatives.
| Attribute | Ethylene Glycol | Propylene Glycol | Diethylene Glycol |
|---|---|---|---|
| Toxicity | Toxic — not food-safe | GRAS / food-safe | Toxic — not food-safe |
| Freeze Point (50% solution) | −37 °C (−34 °F) | −32 °C (−26 °F) | −42 °C (−44 °F) |
| Boiling Point | 197 °C (387 °F) | 188 °C (370 °F) | 245 °C (473 °F) |
| Primary Use | Antifreeze, HVAC, polyester | Food, pharma, HVAC | Natural gas drying, resins |
| Relative Cost | Low | Moderate | Low–Moderate |
Industries We Supply Ethylene Glycol To
HVAC & Refrigeration
Ethylene glycol is the standard heat-transfer fluid in chilled-water loops, cooling towers, and industrial refrigeration systems across Texas.
Ethylene Glycol supply in Houston, TXAutomotive & Fleet
Engine coolant and antifreeze formulations for passenger vehicles, heavy trucks, and fleet maintenance operations.
Ethylene Glycol supply in Dallas, TXPolyester & Fiber Manufacturing
Key raw material in PET resin and polyester fiber production — supplied in bulk tanker quantities to Texas manufacturing plants.
Ethylene Glycol supply in Fort Worth, TXNatural Gas Processing
Used as a hydrate inhibitor and dehydration agent at gas processing facilities and pipeline operations throughout the Gulf Coast.
Ethylene Glycol supply in San Antonio, TX