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
SDS available upon request. Toxic to animals if ingested — store away from food and feed.
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
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.