Monoethylene Glycol (MEG)
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Resin & Coating Raw Materials
Its primary roles include serving as a key ingredient in automotive antifreeze and as a crucial component in creating polyethylene terephthalate (PET) for polyester fibers and plastics. MEG's applications extend to the production of synthetic resins, solvents, and various other products. It also acts as a hydrating agent and solvent in pharmaceutical and tanning industries. In hydraulic fluids, MEG prevents rubber erosion by oil-based fluids, particularly in non-combustible settings like aircraft and high-temperature operations.
| CAS No. | 107-21-1 |
| Items | Unit | Index | Test Method | |
| Appearance | Transparent liquid,without mechanical impurities |
GB/T 4649-2018 | ||
| Ethylene glycol(MEG) | %(m/m) | ≥99.9 | GB/T 14571.2-2018 |
|
| Diethylene glycol(DEG) |
%(m/m) | ≤0.050 | GB/T 14571.2-2018 |
|
| Triethylene glycol(TEG) |
%(m/m) | GB/T 14571.2-2018 |
||
| Colour(Before heating) |
(Pt-Co)/Scale | ≤5 | GB/T 3143-1982 | |
| Colour(After heating with hydrochloric acid) |
(Pt-Co)/Scale | ≤20 | GB/T 3143-1982 | |
| Density(20℃) | g/cm3 | 1.1128-1.1138 | GB/T 2013-2010 | |
| Distillation Range IBP |
℃ | ≥196.0 | GB/T 7534-2004 | |
| Distillation Range DP |
℃ | ≤199.0 | GB/T 7534-2004 | |
| Water content | %(m/m) | ≤0.08 | SH/T 1055-1991 | |
| Acid content (Calculated by acetic acid) |
mg/kg | ≤10 | GB/T 14571.1-2016 |
|
| Iron content (Calculated by Fe2+) |
mg/kg | ≤0.10 | GB/T 3049-2006 | |
| Ash content | mg/kg | ≤10 | GB/T 7531-2008 | |
| Aldehyde content (calculated by formaldehyde) |
mg/kg | ≤8.0 | GB/T 14571.3-2008 |
|
| Items | Unit | Index | Test Method |
| Appearance | Transparent liquid, without mechanical impurities |
GB/T 4649-2018 | |
| Ethylene glycol(MEG) | %(m/m) | ≥99 | GB/T 14571.2-2018 |
| Diethylene glycol(DEG) |
%(m/m) | ≤0.06 | GB/T 14571.2-2018 |
| Tricthylene glycol(TEG) |
%(m/m) | GB/T 14571.2-2018 |
|
| Colour(Before heating) |
(Pt-Co)/Scale | ≤10 | GB/T3143-1982 |
| Colour(After heating with hydrochloric acid) |
(Pt-Co)/Scale | GB/T 3143-1982 | |
| Density (20℃) | g/cm3 | 1.1125-1.1140 | GB/T 2013-2010 |
| Distillation Range IBP |
℃ | ≥195 | GB/T 7534-2004 |
| Distillation Range DP |
℃ | ≤200 | GB/T 7534-2004 |
| Water content | %(m/m) | ≤0.2 | SH/T 1055-1991 |
| Acid content (Calculated by acetic acid) |
mg/kg | ≤30 | GB/T 14571.1-2016 |
| Iron content (Calculated by Fe2+) |
mg/kg | ≤5.0 | GB/T 3049-2006 |
| Ash content | mg/kg | ≤20 | GB/T 7531-2008 |
| Aldehyde content (calculated by formaldehyde) |
mg/kg | GB/T 14571.3-2008 |
Monoethylene Glycol (MEG) stands as a fundamental compound in various industries due to its versatile properties and wide-ranging applications. As a vital member of the glycol family, MEG is a colorless, odorless, and viscous liquid with a molecular formula C2H6O2, commonly known for its hygroscopic nature and remarkable solvency. Its chemical structure comprises two hydroxyl (OH) groups, making it a valuable building block in the synthesis of different chemical compounds.
One of the most prominent characteristics of MEG is its exceptional ability to dissolve a variety of substances, particularly polar and non-polar compounds, which makes it a crucial component in the manufacturing of a myriad of products. MEG's hygroscopic nature, meaning its strong affinity for water, makes it a pivotal ingredient in applications like antifreeze solutions, where it effectively lowers the freezing point of water, thereby preventing the formation of ice in cooling systems. This property is highly advantageous in automotive engines, HVAC systems, and other industrial processes, ensuring optimal performance in extreme temperatures.
MEG's significance extends beyond its role in antifreeze solutions. It serves as a key constituent in the production of polyester resins, which are extensively utilized in the manufacture of fibers for textiles and polyethylene terephthalate (PET) for packaging materials, bottles, and containers. Its versatility also includes applications in the pharmaceutical, chemical, and cosmetic industries, where its solvency and stability contribute to the formulation of various products, such as ointments, skin creams, and pharmaceutical preparations.
MEG's low volatility, high boiling point, and stability under different environmental conditions make it an indispensable component in diverse industrial processes. Its ability to act as a carrier for active ingredients and its compatibility with various materials contribute to its wide usage in different formulations and manufacturing processes.
