Is Ethylene Glycol the Same as Monoethylene Glycol?
Yes, ethylene glycol (EG) and monoethylene glycol (MEG) are essentially the same chemical substance. Both have the molecular formula C₂H₆O₂ and CAS No. 107-21-1. The difference is mainly in terminology and context. Ethylene glycol (EG) is the chemical's common name, while monoethylene glycol (MEG) is widely used in industrial, commercial, and chemical-trade applications to distinguish it from related glycols such as diethylene glycol (DEG) and triethylene glycol (TEG).
What Is Ethylene Glycol?
Ethylene Glycol is an organic compound with the chemical formula C₂H₆O₂ and CAS No. 107-21-1. It is a clear, colorless liquid. CAS 107-21-1 is a diol, meaning that its molecule contains two hydroxyl (-OH) groups. It is widely used as an industrial raw material and as a component of heat-transfer and antifreeze formulations.
| Property | Ethylene Glycol |
|---|---|
| Chemical Formula | C₂H₆O₂ |
| CAS No. | 107-21-1 |
| Molecular Weight / Molar Mass | 62.07 g/mol |
| Appearance | Clear, colorless liquid |
| Density | Approx. 1.11 g/cm³ |
| Boiling Point | Approx. 197.3 °C |
| Melting Point | Approx. -12.9 °C |
What Is Monoethylene Glycol (MEG)?
MEG Monoethylene Glycol refers specifically to the pure, single-molecule form of ethylene glycol, used to distinguish it from:
- Diethylene Glycol (DEG)
- Triethylene Glycol (TEG)
Therefore, when a buyer requests MEG, ethylene glycol, or EG with CAS 107-21-1, they are generally referring to the same basic chemical substance. However, buyers should still confirm the required grade, purity, specification, and intended application before placing a bulk order.
Why Are There Two Names: EG and MEG?
Ethylene Glycol and Monoethylene Glycol are typically used in different contexts:
- Ethylene Glycol (EG): The common name used in scientific and laboratory fields.
- Monoethylene Glycol (MEG): The common name used in industrial and trade sectors.
In the industrial sphere, the use of the prefix "mono" serves to distinguish MEG from Diethylene Glycol (DEG) and Triethylene Glycol (TEG).
What Is EG/MEG Used for?
CAS 107-21-1 Mono Ethylene Glycol MEG has a broad range of applications across multiple industries, with three core application directions. First, it is a key precursor for polyester fibers and polyethylene terephthalate (PET) resins, playing an irreplaceable role in the textile manufacturing and packaging material industries. Second, it is a main component of antifreeze and coolant, Mono Ethylene Glycol is widely used in engine and heating system temperature control. In addition, Ethylene Glycol MEG is also applied in the production of coatings, paints and synthetic resins as an important industrial raw material.
MEG Bulk Supply for Industrial Buyers
If you are sourcing high-purity Ethylene Glycol MEG for PET, antifreeze, or chemical manufacturing, working with a reliable ethylene glycol supplier or MEG manufacturer ensures stable quality, compliant packaging, and competitive pricing.
For B2B purchasing, buyers can request the COA, SDS/MSDS, TDS, product specification, packaging details, and quotation before confirming an order.
GNEE BIO supplies industrial chemical raw materials for international B2B buyers and can coordinate product specifications, packaging, documentation, and export logistics with cooperating production facilities.
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Frequently Asked Questions
Q1: Are MEG and antifreeze the same thing?
No. MEG is a chemical raw material used to formulate antifreeze, whereas antifreeze is a blended product.
Q2: Why is it referred to as "Monoethylene Glycol"?
This is to distinguish it from Diethylene Glycol (DEG) and Triethylene Glycol (TEG).
Q3: Is ethylene glycol hazardous?
Yes. Ethylene glycol is toxic if ingested; therefore, appropriate handling measures must be implemented during industrial operations.
Q4: What are the primary uses of MEG?
MEG is primarily used in the production of PET (Polyethylene Terephthalate) and in the manufacture of antifreeze.
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For chemical procurement, we can provide relevant documents such as COA, SDS/MSDS, and TDS according to the product and order requirements.
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