TEG (Triethylene Glycol)

Triethylene glycol (TEG, C6H14O4, CAS 112-27-6) is a clear, colourless, viscous and strongly hygroscopic liquid supplied by Global Chemicals LLC at 99% minimum purity, boiling point 285 °C and specific gravity 1.125 at 20 °C, in drums, 1,000 L IBCs, ISO tanks and bulk from stock in Muscat, for gas plants and industrial users across Oman and the GCC.

Gas dehydration is the main use. In a glycol contactor, lean TEG absorbs water vapour from natural gas so the gas leaves dry enough to meet pipeline and LNG specifications and will not form hydrates or free water downstream; the rich glycol is then regenerated by boiling off the water in a reboiler and recycled. TEG is preferred over DEG and MEG for this duty because its high boiling point lets it be regenerated to 98.5–99% purity at reboiler temperatures around 200 °C with low vapour losses, and stripping gas raises lean purity further where a deeper dew point is needed. Keep the reboiler below about 204 °C, where TEG begins to degrade, keep oxygen out of the system, and watch pH, which falls as degradation acids build up; plant operators top up losses with make-up TEG. The glycol comparison guide linked on this page sets out TEG, DEG and MEG side by side.

Other uses: a humectant and plasticiser in resins, inks, adhesives and cellulose films; a solvent and coupling agent; a component of hydraulic and heat-transfer fluids; an intermediate for esters and polyester resins; and the base fluid of some fog and haze machines.

Handling and storage: TEG is low in toxicity, combustible only at high temperature, and not regulated for transport. Its main storage issue is water pickup, which spoils it for dehydration duty, so keep drums tightly closed and tanks under a dry gas blanket; store in carbon-steel or stainless tanks. Wear gloves and safety glasses. Every delivery carries a certificate of analysis giving purity, water content and colour, a technical data sheet and a safety data sheet.

Delivery is same day within Muscat, next day to Sohar, Salalah and Duqm, to the interior gas plants by arrangement, and by road across the GCC with a certificate of origin. Request a quote with the volume, pack type and delivery schedule.