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[Chemical Knowledge]：Properties and Uses of Dipropylene Glycol

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Dipropylene glycol (Dipropylene Glycol, referred to as DPG) is a colorless, odorless, transparent, viscous liquid, with moisture absorption and moisture retention, widely used in the field of chemical production raw materials. This article will detail the properties and uses of dipropylene glycol.

1. properties of dipropylene glycol

1. Physical properties
dipropylene glycol has a molecular formula of C6H14O3, a molecular weight of 134.17, a density of 1.04g/cm3, a boiling point of 245 ℃, a melting point of -10 ℃, and a flash point of 121 ℃. It is soluble in water, ethanol, ether and other organic solvents, but insoluble in petroleum ether. Dipropylene glycol has a high viscosity, and the viscosity decreases with the increase of temperature.

2. chemical properties
dipropylene glycol with alcohol hydroxyl chemical properties, can occur esterification, etherification, oxidation and other reactions. In addition, it is also reductive and can be oxidized to malonic acid.

2. the use of dipropylene glycol

1. Moisturizing agent
dipropylene glycol has good moisture retention, can be used as a moisturizing agent for cosmetics, skin care products, can keep the skin moisture, make the skin soft and smooth.

2. solvent
dipropylene glycol can be used as a solvent for printing ink, paint, adhesive and other chemical products, can improve the product fluidity, stability and dry.

3. Antifreeze
dipropylene glycol has a low freezing point and can be used as an antifreeze in the refrigeration system to prevent the system from freezing.

4. preservative
dipropylene glycol has certain antibacterial properties, can be used as a preservative in food, medicine and other products, to extend the shelf life of the product.

5. synthetic intermediate
dipropylene glycol can also be used as a synthetic intermediate for the production of other chemicals, such as ethylene glycol, propylene glycol, etc.
Precautions for
3.

need to pay attention to the following points when using dipropylene glycol:

1. Dipropylene glycol is irritating to the skin and eyes, and contact with eyes and damaged skin should be avoided.

2. Dipropylene glycol should be stored in a cool, dry, ventilated place, avoid direct sunlight and high temperature.

In conclusion, dipropylene glycol, as an important chemical raw material, has a broad application prospect in the field of chemical production.

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