Triethylene glycol (TEG) is a toxic, colorless and non-flammable liquid that is denser than water like diethylene glycol. Its molecular formula is C6H14O4 and has a mild odor. Molecular Weight of TEG is 150.174 g/mol. Its boiling point and melting points are 545oF and 24.3oF respectively. This component is miscible in water and is slightly soluble in chloroform . triglycol or TEG has low vapor pressure and its viscosity and density is 47.8 centipoise at 20oC and 1.125 at 68oF respectively. It uses for many industrial and non-industrial processes. Like diethylene glycol, has a key role in gas processing and gas sweetening. Also, used as a plasticizer for vinyl polymers. It is generally classified as non-hazardous.
Chemical and physical properties of Triethylene glycol
In the table below some of the chemical and physical properties of this product are mentioned. All data that is mentioned in this table is gathered from Wikipedia website:
There are different ways to produce this component, but one of the most popular processes is that we introduce as follows.
TEG obtains as a by-product of the oxidation of ethylene in the presence of silver oxide catalyst .
Applications of Triethylene glycol
this component has many different industrial and non-industrial applications. Increasing its applications in automotive products and constructions due to the rapid population growth rate and emerging economies of China, Brazil, and Mexico have caused a shining future for this market. We anticipated the global TEG market worth reach to USD 718.3 million by 2022. Forecasts show this market in the gas processing segment can reach to CAGR of over 3.5% from 2015 to 2022 .
We can divide its consumptions into two categories:
1- Industrial consumptions
2- Consumer (non-industrial) consumptions
This component can be used as a solvent in many chemical processes. In some cases is useful in Adhesives and sealant chemicals. Like DEG is useful in plasticizers, intermediates industries. Use as absorbents and is one of the most applications of TEG. of course main uses for this liquid are related to its hygroscopic property. In natural gas sweetening carbon dioxide and hydrogen sulfide gases, which is referred to as acid gases, must be removed from the natural gas stream. After the sweetening process, natural gas has slight moisture that should be removed to prevent hydrate formation and pipeline corrosion. TEG absorbs moisture very well. This substance is useful in fuels and their additives too.
TEG has wide uses in this segment like an industrial one. Its applications as anti-freeze and de-icing goals, automotive care products, building, and construction use have attracted enormous interest.
Painting and coating applications, Laundry and dishwashing products are another use of this liquid in our life .
Global Triethylene glycol marketing, by applications, From 2012 – 2022 (Kilo Tons) 
 (n.d.). Retrieved November 17, 2018, from https://www.solventis.net/products/glycols/tri-ethylene-glycol/
 (TEG) Market Growth, Research And Report To 2022. (n.d.). Retrieved November 17, 2018, from https://www.linkedin.com/pulse/triethylene-glycol-teg-market-growth-research-report-2022-bharti/?articleId=7313015869507717148
 (TEG) Market Analysis By Application (Natural Gas Dehydration, Solvents, Plasticizers, Polyurethanes, Humectants, Polyester Resins) And Segment Forecasts To 2022. (n.d.). Retrieved November 17, 2018, from https://www.grandviewresearch.com/industry-analysis/triethylene-glycol-market