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[Chemical Knowledge]：Properties and Uses of Diethylene Glycol (DEG)

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Diethylene glycol (DEG) is a colorless, odorless, transparent, viscous liquid with hygroscopicity and toxicity. It has a wide range of uses in the field of chemical production raw materials, mainly used as solvents, plasticizers and chemical reaction intermediates.

1. the properties of diethylene glycol

1. physical properties
diethylene glycol is a colorless transparent viscous liquid, with hygroscopicity. Its boiling point is higher, 245 ℃, and its melting point is lower, -10.4 ℃. Diethylene glycol is slightly denser than water, at 1.116g/cm³. It is insoluble in water, but is miscible with many organic solvents.

2. chemical properties
diethylene glycol has the general nature of alcohol, can react with acid to generate ester, and aldehyde, ketone reaction to generate acetal or ketal. In addition, it can also react with halogenated hydrocarbons to form ethers.

2. the use of diethylene glycol

1. Solvent
diethylene glycol is an excellent solvent, can be used to dissolve many organic compounds, such as resins, oils, dyes, etc. It has a wide range of applications in ink, paint, adhesive and other fields.

2. Plasticizer
diethylene glycol can be used as a plasticizer for plastics, which can increase the flexibility and ductility of plastics and improve the processing performance of plastics. It has a wide range of applications in plastic products.

3. Chemical Reaction Intermediates
diethylene glycol can be used as an intermediate for many chemical reactions, such as reacting with anhydrides to form esters, which react further to form polymers. In addition, it can also be used for the synthesis of ethylene glycol, propylene glycol and other compounds.

3. precautions

diethylene glycol is toxic, and inhalation or ingestion of large amounts of diethylene glycol can cause harm to human health. Therefore, in the operation and use of diethylene glycol, should take the necessary protective measures, such as wearing protective gloves, glasses, etc.

In short, as an important raw material for the production of chemical products, diethylene glycol has a wide range of applications in the fields of solvents, plasticizers and chemical reaction intermediates. In the process of use, attention should be paid to safe operation to avoid harm to human health.

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