Triethylene glycol (TEG), identified by CAS No. 112-27-6, is a versatile member of the dihydroxy alcohol family characterized as a clear, colorless, and odorless viscous liquid. Physically, TEG is highly hygroscopic and exhibits a high boiling point paired with low vapor pressure, making it exceptionally stable under standard operating conditions. Its primary industrial utility lies in the oil and gas sector, where it serves as a superior liquid desiccant for the dehydration of natural gas to prevent pipeline corrosion and hydrate formation. Beyond gas processing, TEG is a critical intermediate in the synthesis of polyester resins and plasticizers, and it functions effectively as a solvent and humectant in specialized formulations. Regarding safety, TEG exhibits low acute toxicity and is generally non-irritating to the skin; however, standard industrial hygiene practices, including the use of protective eyewear and gloves, are recommended. While not classified as hazardous for transport, ingestion of significant quantities must be avoided.
* Effectively dehydrates natural gas and air conditioning systems.
* Offers high purity for consistent industrial performance.
* Serves as a versatile solvent for various organic and aqueous applications.
* Possesses excellent thermal stability with a high boiling point.
* Features low volatility and vapor pressure for stable operation.
* Functions as a key intermediate in chemical synthesis, including plastics.
* Ideal for heat transfer fluids and antifreeze formulations.
* Safe to handle due to its colorless, odorless, and non-corrosive properties.
* Molecular Weight: 150.18
* Appearance: Clear, colorless, practically odorless
* Specific Gravity @ 20/20°C: 1.124 – 1.126
* Purity, % wt: 99.0 min
* Distillation Range (IBP-DP): 280.0 – 295.0°C
* Water, % wt: 0.10 max
* Acidity (as Acetic Acid), % wt: 0.005 max
* Ash, % wt: 0.01 max
* Refractive Index @ 20°C: 1.4530 – 1.4560
* Viscosity @ 20°C, cP: 48
* **Natural Gas Dehydration:** Effectively removes water vapor from natural gas, preventing hydrate formation and corrosion in pipelines.
* **Aromatic Extraction Solvent:** Used in petroleum refining to selectively dissolve aromatic compounds from hydrocarbon mixtures.
* **Humidity Control Agent:** Utilized in air conditioning and ventilation systems to absorb moisture and maintain optimal humidity levels.
* **Solvent for Inks and Dyes:** Serves as a versatile solvent in the formulation of printing inks, textile dyes, and other colorants.
* **Plasticizer:** Employed in various polymers, such as vinyl films and coatings, to impart flexibility and durability.
* **Heat Transfer Fluid:** Functions as a heat transfer fluid in industrial applications due to its high boiling point and thermal stability.
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