Triethylene glycol
Triethylene glycol (CAS: 112-27-6; Formula: HO(CH2CH2O)2CH2CH2OH) is a clear, colourless, hygroscopic liquid with a mild odour. It is a polyol with excellent solvent properties and low volatility. Triethylene glycol finds significant use as a plasticiser, a humectant, and a chemical intermediate in various industrial processes, including the production of resins and as a component in hydraulic fluids.
- IUPAC
- Triglycol
- Synonyms
- Triglycol

Plasticiser
Triethylene glycol is employed as a plasticiser to impart flexibility and durability to various polymers and resins. It helps to reduce the glass transition temperature, making materials more pliable for processing and end-use applications.
Chemical Synthesis
As an organic building block, triethylene glycol serves as a versatile intermediate in chemical synthesis. It is used in the production of polyesters, polyurethanes, and other complex organic molecules, contributing its ether and hydroxyl functionalities.
Humectant and Solvent
Its hygroscopic nature makes triethylene glycol an effective humectant in industrial applications where moisture control is essential. It also functions as a solvent for dyes, resins, and various organic compounds due to its polarity.
Industrial Fluids
Triethylene glycol is incorporated into formulations for hydraulic fluids and brake fluids. Its thermal stability and lubricating properties contribute to the performance and longevity of these critical automotive and industrial systems.
| Molecular weight | 150.17 |
|---|---|
| Linear formula | HO(CH2CH2O)2CH2CH2OH |
| Assay | ≥99.0% (GC) |
| Boiling point | 125-127 °C/0.1 mmHg(lit.) |
| Density | 1.124 g/mL at 20 °C(lit.) |
| Refractive index | n20/D 1.455(lit.)n20/D 1.456 |
| Vapour pressure | <0.01 mmHg (20 °C) |
| Melting point | −7 °C(lit.) |
| Vapour density | 5.2 (vs air) |
| Autoignition temp | 699 °F |
| Impurities tested | ≤0.08% water |
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 166 °C / 330.8 °F |
| Water hazard class (WGK, DE) | 1 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Triethylene glycol used for?
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Triethylene glycol is used as a plasticiser, a humectant, a solvent, and an intermediate in chemical synthesis. It is also found in hydraulic fluids and brake fluids.
What are the CAS number and formula for Triethylene glycol?
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The CAS number for Triethylene glycol is 112-27-6, and its linear formula is HO(CH2CH2O)2CH2CH2OH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Triethylene glycol with an assay of ≥99.0% (GC). This is a technical grade; TSS does not represent it as USP, BP, or EP grade.
How should Triethylene glycol be handled safely?
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Handling Triethylene glycol requires appropriate personal protective equipment, including eyeshields and gloves. A full-face respirator and specific respirator filter types (e.g., ABEK) are recommended for adequate protection, as indicated by its safety data.
Is Triethylene glycol a controlled substance?
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The provided data does not indicate that Triethylene glycol is a controlled substance.
How is Triethylene glycol packed and exported by TSS?
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Triethylene glycol is available for packing and export by Tech Serve Solutions according to customer requirements and international shipping regulations for chemical goods.
How can I request a quote or sample of Triethylene glycol?
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To request a quote or a sample of Triethylene glycol, please contact the Tech Serve Solutions sales team through our website or designated contact channels.
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