Ethylene glycol and diethylene glycol are organic compounds that have applications in the production of coolants for engines. They have closely related structures; a diethylene glycol is a combination of to ethylene glycol molecules.
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What is Ethylene Glycol (eG) CAS 107-21-1?
Both DEG and EG belong to the glycol family, which is characterized by the presence of two hydroxyl (-OH) groups. Ethylene glycol EG has a simple structure with two carbon atoms connected by a single bond, each bonded to a hydroxyl group, with the chemical formula C2H6O2. It is a colorless, odorless, and viscous liquid at room temperature, with a relatively high boiling point of 197.3°C and a low freezing point of -12.9°C.
Pure ethylene glycol is a colorless, odorless liquid which is sweet tasting and viscous. This liquid is moderately toxic. Ethylene glycol is miscible with water because it has -OH groups that are capable of forming hydrogen bonds.
What is Diethylene Glycol (DEG) CAS 111-46-6?
In contrast, DEG, with the chemical formula C4H10O3, has a more complex structure. It consists of two ethylene glycol units linked by an ether oxygen atom.
Diethylene glycol is an organic compound having the chemical formula C4H10O3. At room temperature, it is a colorless and odorless liquid. However, it is hygroscopic and poisonous. It has a sweet taste. DEG chemical is miscible with water and alcohols because it is capable of forming hydrogen bonds. The molar mass of this compound is 106.12 g/mol. The melting point of diethylene glycol is -10.45°C and the boiling point is 245°C.
Applications of EG and DEG
Ethylene glycol is widely used in the automotive industry as a key ingredient in antifreeze and coolant formulations. By mixing it with water, it significantly lowers the freezing point and raises the boiling point of a solution, thereby protecting automobile engines from overheating in the summer and from freezing in the winter.MEG is also a high quality solvent that can be used in paints and inks. In addition, EG is an essential ingredient in the manufacture of polyester fibers and polyethylene terephthalate (PET) resins.
Diethylene Glycol DEG is commonly used as a humectant and plasticizer in the production of adhesives, paints and coatings. As a humectant, it helps retain moisture, preventing products from drying out and cracking. As a plasticizer, it enhances the flexibility of materials and improves their processability and durability. In the textile industry, DEG acts as a softener and lubricant for fibers. Although DEG can be used as a solvent in specialized chemical processes, its solvent applications are more limited than those of EG.
Summary
Both ethylene glycol and diethylene glycol are produced from same starting material; ethylene. The difference between EG and DEG is that an ethylene glycol molecule is an individual molecule whereas diethylene glycol molecule is formed by the combination of two ethylene glycol molecules via an ether bond.
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