Mono ethylene glycol (MEG) is an important raw material in many industrial applications including the production of polyester fibres, polyethylene terephthalate (PET) plastics, coolants in antifreeze and resins.
Diethylene glycol (DEG) is similar in properties to MEG, but DEG has a higher boiling point, viscosity, and specific gravity. MEG is the raw material used in the production of polyester fiber, PET resins, alkyds, and unsaturated polyesters. Used as solvent in printing inks ; a raw material for the production of esters ; Used as emulsifiers, demulsifiers, and lubricants.
Triethylene glycol (TEG) is used as plasticiser for polymer fibres, coolants in automobile antifreeze, and resins. Due to its good humectant (hygroscopicity) property of TEG also makes it ideal for use in fibres treatment, paper, adhesives, printing inks, leather and cellophane. In the oil and gas industry, the main use is to dehydrate gases.
►MEG/DEG/TEG Specification :
| Test Item | MEG | DEG | TEG |
| Specific Gravity 20/20℃ | 1.1151~1.1156 | 1.117~1.12 | 1.124~1.126 |
| Distillation Range @760 mm HG，℃ IBP DP |
195 Min. 200 Max |
240 Min. 250 Max |
280 Min. 295 Max |
| Acidity，ppm | 50 Max | 50 Max | 50 Max |
| Color (Pt-Co) | 5 Max | 15 Max | 25 Max |
| Water Content，% | 0.1 Max | 0.1 Max | 0.1 Max |
| Ash Content，% | 0.01 Max | 0.01 Max | 0.01 Max |
| Iron (as Fe Inorganic)，ppm | 0.07 Max | -- | -- |
| Aldehydes，ppm | 10 Max | -- | -- |
| MEG，% | 99.8 Min. | 0.2 Max | -- |
| DEG，% | 0.05 Max | 99.5 Min. | -- |
| TEG，% | -- | 0.25 Max | 99.5 Min. |