CAS 112-27-6 · Ether Diol
Triethylene Glycol
TEG · C₆H₁₄O₄ · MW 150.17 g/mol
The industry-standard glycol for natural gas dehydration — TEG's exceptionally low vapor pressure, high boiling point, and strong hygroscopicity make it uniquely suited for removing water from gas streams in contactor systems. Beyond gas processing, TEG serves as a plasticizer feedstock, humectant, and air disinfection agent. Texas-Chem supplies TEG in drums, totes, and bulk.
Formula
C₆H₁₄O₄
Boiling Point
285 °C
Solubility
Fully water-miscible
Pack Sizes
Drums · Totes · Bulk
Structural Formula
Three ethylene oxide units linked in sequence — two ether oxygens and two terminal hydroxyl groups
Safety & Regulatory
- NFPA Health
- 1 — Slight hazard
- NFPA Flammability
- 1 — Slight hazard
- NFPA Reactivity
- 0 — Stable
- OSHA PEL
- None established
- ACGIH TLV
- None established
- DOT Hazard Class
- Not regulated
- Toxicity
- Low acute toxicity
SDS available upon request.
Grades & Packaging
Available Grades
Pack Sizes
Physical & Chemical Properties
| Molecular Formula | C₆H₁₄O₄ |
| Molecular Weight | 150.17 g/mol |
| CAS Number | 112-27-6 |
| Boiling Point | 285 °C (545 °F) |
| Melting Point | −7 °C (19.4 °F) |
| Flash Point | 166 °C (331 °F) — Combustible |
| Density | 1.125 g/cm³ at 20 °C |
| Vapor Pressure | <0.001 kPa at 20 °C |
| Solubility in Water | Miscible in all proportions |
| Viscosity | 47.8 mPa·s at 25 °C |
| Refractive Index | 1.4559 at 20 °C |
| Auto-ignition Temp. | 371 °C (700 °F) |
Industrial Applications
Natural Gas Dehydration
TEG is the industry-standard dehydration agent for natural gas processing. Its high boiling point, low vapor pressure, and excellent water absorption capacity make it ideal for glycol contactor systems that remove water vapor from gas streams.
Plasticizers
Feedstock for triethylene glycol diacetate, dibenzoate, and other specialty plasticizers used in PVC, cellulosic films, and adhesive formulations requiring high-temperature stability.
Humectants
Hygroscopic humectant in tobacco processing, paper coatings, and printing inks. Maintains moisture content and prevents drying during storage and processing.
Air Disinfection
TEG vapor has documented bactericidal and virucidal properties. Used in air sanitization systems for hospitals, food processing facilities, and HVAC applications.
Chemical Intermediates
Precursor for triethylene glycol dimethyl ether (triglyme) — a high-boiling polar aprotic solvent used in lithium battery electrolytes and specialty chemical synthesis.
Textile & Leather
Softening and conditioning agent in textile finishing and leather processing. Provides flexibility and moisture retention in finished goods.
Why Source TEG from Texas-Chem?
- 35+ years supplying glycols to Texas oil & gas and industrial customers
- Industrial grade for gas dehydration and process applications
- 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