Alcohols & Glycols
REACH
Triethylene glycol
CAS Number
112-27-6
EC Number
203-953-2
Abbreviation
TEG
What is Triethylene glycol?
Triethylene glycol (CAS 112-27-6), commonly abbreviated as TEG, is a high-boiling glycol ether used as a solvent, humectant, and chemical intermediate.
Where is Triethylene glycol used?
- Natural gas processing: standard dehydration agent removing water vapor from gas streams before pipeline transport
- Plastics and polymers: reactive intermediate
- Polyester and polyurethane synthesis: contributes to chain flexibility and crosslink density
- Personal care and pharmaceuticals: humectant and solvent carrier for active ingredients in creams, gels, and liquid dosage forms
- Air disinfection systems employ TEG as a low-toxicity antimicrobial agent dispersed as a fine mist.
Good to know: Its low volatility and hygroscopic character suit controlled moisture retention or selective absorption. Moisture content and purity levels are key specification parameters buyers should confirm against application requirements.
Commercial specifications
- Clear, low-viscosity liquid in drums, IBCs, and bulk tanker quantities
- Technical and high-purity grades; high-purity meets pharmaceutical and personal care requirements
Other Names (Synonyms)
2-[2-(2-hydroxyethoxy)ethoxy]ethanol|1,2-bis(2-hydroxyethoxy)ethane|TEG|triglycol|di-beta-hydroxyethoxyethane|3,6-dioxaoctane-1,8-diol|2,2'-ethylenedioxydiethanol|2,2'-ethylenedioxybis(ethanol)
What are the physical properties of Triethylene glycol?
Melting Point -7 °C
Boiling Point 165 °C @ Press: 14 Torr
Density 1.1274 g/cm³ @ Temp: 15 °C
Flash Point 165 °C
Appearance Colorless, hygroscopic liquid; practically odorless. Soluble in water; immiscible with benzene, toluene, and gasoline. Combustible.
Color Clear very slightly yellow
Odor Very mild, sweet.
Form Viscous Liquid
Water Solubility SOLUBLE
Vapor Pressure <0.01 mm Hg ( 20 °C)
Refractive Index n 20/D 1.455(lit.)
pH 5.5-7.0 (25℃, 50mg/mL in H2O)
Log P -1.75 at 25℃
How is Triethylene glycol classified and handled safely? Learn More
Danger
GHS05· Corrosive GHS07· Irritant
Hazard Statements
H302 Harmful if swallowed
H312 Harmful in contact with skin
H314 Causes severe skin burns and eye damage
H412 Harmful to aquatic life with long lasting effects
Precautionary Statements
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P273 Avoid release to the environment.
Which trade and regulatory codes apply to Triethylene glycol?
HS Code 29094919
WGK (Germany) 1