CAS 107-21-1 Ethylene glycol (EG), commonly known as MEG mono ethylene glycol or 1,2-Ethanediol, is the simplest aliphatic diol with a chemical formula of C2H6O2 and a molecular weight of 62.07. It is typically a colorless, transparent, viscous liquid with a sweet taste and is hygroscopic. Its melting point is -12.9°C, boiling point is 197.3°C, flash point is 111°C, and density is 1.13 g/mL. Mono Ethylene Glycol is slightly soluble in ether and practically insoluble in benzene and its homologues, chlorinated hydrocarbons, and petroleum ether. MEG is miscible with water, lower aliphatic alcohols, glycerol, acetic acid, acetone, and other similar ketones, aldehydes, and pyridine.
Specification of Ethylene Glycol:
| Item | specification | test result |
| appearance | colorless and transparent liquid | colorless and transparent liquid |
| ethylene glycol | ≥99.8 | 99.9 |
| Density ( at 20ºC) | 1.1128-1.1138 | 1.113 |
| Color ( Pt-Co) | ≤5 | 5 |
| Initial boiling point, ºC | ≥196 | 196 |
| End boiling point, ºC | ≤199 | 198 |
| Water (weight,%) | ≤0.1 | 0.03 |
| Acidity (Acetic Acid, weight, %) | ≤0.001 | 0.0008 |
Industrial Grade Mono Ethylene Glycol Uses
Polyester Industry: The top consumer of MEG, it is primarily used to produce polyester fibers (for textiles, carpets, rugs) and polyester resins (for composites, surface coatings, plastics).
Antifreeze & Coolant Industry: MEG's low freezing point makes it key for automotive antifreeze. It also acts as a heat transfer fluid in industrial cooling systems and air conditioners, and is used to make various coolants.
Chemical, Detergent & Cleaning Industries: Mono Ethylene Glycol is used in manufacturing detergents/cleaners and serves as a precursor for synthesizing diethylene glycol (DEG) and triethylene glycol (TEG).
Pharmaceutical Industry: Functions as a solvent or excipient in formulating certain medications, supporting pharmaceutical production processes.
Paint & Coating Industry: MEG acts as a solvent for dissolving resins, pigments, and additives in paints. It improves surface adhesion, controls viscosity as a thinner, and enhances paint application.
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