Triethylene Glycol
The industry-standard glycol for natural-gas dehydration — also used in polyester, plasticizer, solvent and PEGylation applications worldwide.
Chelora Chemicals supplies TEG to gas-processing, polyester and specialty-chemical manufacturers, with full documentation and consistent purity on every consignment.
Product identity
- CAS Number
- 112-27-6
- IUPAC name
- 2,2'-(Ethylenedioxy)diethanol
- Molecular formula
- C₆H₁₄O₄
- Molecular weight
- 150.17 g/mol
- Boiling point
- 276 °C
- Specific gravity
- 1.13 (20/20 °C)
- GHS Pictogram
- GHS07
- HS Code
- 2909 49 80 90
Note: we confirm the exact transport classification for your specific shipment size and destination before booking.
What Triethylene Glycol is used for
Triethylene Glycol (TEG) is a colourless, practically odourless, viscous, hygroscopic liquid, fully miscible with water and many organic solvents. It is the third member of the ethylene-glycol family, formed in smaller proportion alongside MEG and DEG when ethylene oxide is hydrolysed.
TEG's defining use is as the industry-standard dehydrating and dew-point-control glycol in natural-gas processing — its combination of high boiling point, strong water affinity and good thermal stability lets gas plants regenerate it by simple heating, making it the preferred glycol for continuous gas-dehydration units. Beyond gas processing, TEG is used in polyester and plasticizer manufacture, as an alcohol/organic solvent, as a building block for PEG (polyethylene glycol) oligomers, and as a diol monomer in biomaterials chemistry.
Where it sits in the petrochemical value chain
- Ethylene Oxide the shared feedstock hydrolysed to form MEG, DEG and TEG together. See that page.
- Mono Ethylene Glycol the primary, highest-volume product of the same hydrolysis step. See that page.
- Triethylene Glycol (this product) the smallest-volume co-product, valued specifically for gas dehydration and specialty applications.
Handling character
TEG is considered one of the less acutely hazardous glycols in this range, carrying a GHS Warning signal word for eye irritation. Full hazard detail is in the Safety section below.
| Parameter | Typical value |
|---|---|
| Appearance | Clear, colourless liquid |
| Assay | 99% min (industrial / gas-dehydration grade) |
| Water content | < 0.2% |
| Colour (APHA) | Within producer specification |
Important: the figures above are indicative of commercial material and are offered for planning only. The batch certificate of analysis is the governing document.
| Property | Value |
|---|---|
| Physical state | Clear, colourless, viscous, hygroscopic liquid |
| Boiling point | 276 °C |
| Specific gravity | 1.13 (20/20 °C) |
| Water solubility | Fully miscible |
| Flash point | ~177 °C (combustible) |
Physical constants compiled from public reference data for CAS 112-27-6 and rounded for readability. Treat them as orientation, not as a specification.
Where our customers put this glycol to work
The glycol the gas-processing industry built its dehydration units around.
Natural-gas dehydration
The industry-standard glycol for continuous gas-dehydration and dew-point-control units.
- Gas-dehydration grade specification
- Bulk & drum supply
- Technical desk review on request
Polyester & plasticizer manufacture
Used as a diol building block in polyester and plasticizer formulations.
- Industrial-grade specification
- Documented batch traceability
Alcohol / organic solvent
Used as a solvent across alcohol-based and organic formulations.
- Contract & spot supply
- Full analytical documentation available
PEG oligomer building block
A diol starting point for PEG (polyethylene glycol) oligomer synthesis.
- Packs sized to customer volumes
- Retained sample held against the lot
Biomaterials diol monomer
Used as a diol monomer in biomaterials chemistry and specialty polymer research.
- Research & process-scale quantities
- Full documentation supplied
Contract & scheduled supply
Gas-processing plants running continuous consumption are supported with scheduled bulk delivery.
- Annual contracts with scheduled call-off
- Second source held in reserve
How we supply Triethylene Glycol
Chelora Chemicals is a supplier and sourcing partner, not a manufacturer. Purity and water content are critical to gas-dehydration performance — that shapes how we manage this line.
We place your order with whichever qualified producer best matches your required grade, your price point and your delivery window, and confirm your jurisdiction's import requirements before booking.
We keep a second qualified source on this line, so a single-plant disruption never becomes your production problem.
- Purity and water content confirmed before we quote. Consistency matters to gas-dehydration and polyester quality alike.
- Classification and documentation managed end to end. Labelling and carrier compliance confirmed before booking.
- Scheduled call-off scheduling. We hold contracted tonnage and release it against your consumption calendar.
- Batch traceability to the producing plant. Full chain of custody documentation on request.
- Export machinery handled in-house. Classification, approved packing, labelling, freight booking and customs paperwork are ours to manage.
- Gas-dehydration grade sourced to your specification. Matched precisely to your process requirement.
Packed the way your plant receives it
Drum, tote or bulk tank — tell us your preferred format and we will quote and classify to it.
200-230 kg drums
Steel or plastic drums for smaller-volume orders and trial quantities.
~1,000 litre totes
Returnable or one-way IBC totes sized for mid-volume gas-plant orders.
Large-volume bulk shipment
ISO tank or flexi-tank bulk shipment for continuous-consumption gas-processing plants.
Incoterms to suit you
Quoted on the Incoterm your purchasing team works to, with documentation filed before booking.
Trial / sample quantities
Small packs dispatched for process trials before a commercial order is placed.
Contracted call-off supply
We hold contracted tonnage and release it against your consumption calendar.
Causes serious eye irritation — one of the milder glycols
TEG is considered one of the less acutely hazardous glycols in this range. The summary below is orientation only — the safety data sheet supplied with your specific batch is the authoritative document.
Classified hazards
H319Causes serious eye irritation.
Eye protection recommended. Avoid direct eye contact during transfer and handling; always read the SDS issued with your specific batch and store accordingly.
Storage
Store in tightly closed containers in a cool, dry, well-ventilated area away from strong oxidising agents.
Handling
Use standard PPE (gloves, eye protection) for liquid transfer. Avoid direct eye contact and prolonged skin exposure; provide adequate ventilation when handling heated or atomised material.
Transport
TEG typically ships under GHS pictogram GHS07 without a dedicated UN dangerous-goods number for standard industrial shipments (HS code 2909.49.80.90); we confirm and document the exact classification for your specific shipment and destination.
Every batch, documented
We verify documentation before dispatch so there are no surprises at your incoming-goods bench.
Specification agreed
Assay, colour and water content confirmed against your process requirement before order placement.
Producer batch testing
The producing plant tests each batch against the agreed specification before release.
Documentation review
COA, SDS and transport paperwork checked by our desk before the shipment is booked.
Traceable dispatch
Each shipment is traceable to its producing batch, with full chain-of-custody records on request.
How TEG is made
TEG forms as the smallest-volume co-product of ethylene oxide hydrolysis, the same reaction used industrially to produce Mono Ethylene Glycol and Diethylene Glycol. As ethylene oxide reacts further with the DEG already formed, a small proportion of TEG is generated alongside the primary MEG and secondary DEG streams.
We do not publish operating process parameters here; this is background only. Full technical documentation accompanies every shipment, and any process-specific detail you need is best confirmed directly with our technical desk.
| Chemical family | Diol / glycol ether (triglycol) |
|---|---|
| Functional groups | Two primary hydroxyl groups, two ether linkages |
| Reactivity | Esterifies with diacids; strong water affinity underlies its dehydration role |
| Related compounds | Ethylene Oxide (feedstock), Mono Ethylene Glycol, Diethylene Glycol (co-products) |
Explore the wider petrochemical range
Triethylene Glycol, answered
What is Triethylene Glycol used for?
Why is TEG preferred for natural-gas dehydration?
Is Triethylene Glycol hazardous?
What grade do you supply?
What packing do you offer?
Do you manufacture this yourself?
- Need a related glycol? See our Mono Ethylene Glycol and Diethylene Glycol pages.
Get a quote on Triethylene Glycol today
Send us your required grade, pack size and delivery window. We will come back with a firm quote, lead time and full documentation.