Introduction
Glycerol, also known as glycerin, is an organic compound and a simple polyol compound. It is a colorless, odorless, sweet-tasting, viscous liquid and is non-toxic. The glycerol backbone is present in lipids known as glycerides. Due to its antibacterial and antiviral properties, it is widely used in wound and burn treatments approved by the FDA. Conversely, it is also used as a bacterial culture medium. It can serve as an effective marker for measuring liver diseases. It is also widely used as a sweetener in the food industry and as a humectant in pharmaceutical formulations.
Molecular formula
C3H8O3
CAS NO.
56-81-5
Packing
215kg/drum
Physical Properties
| Appearance | Glycerol is a colorless, odorless, viscous liquid at room temperature. It has a sweet taste, which is one of its notable characteristics. |
| Melting Point | 17.8 °C (64.0 °F) |
| Boiling Point | 290 °C (554 °F) at normal pressure, but it decomposes slightly around this temperature. Under reduced pressure, it can be distilled without decomposition. |
| Density | 1.26 g/mL at 25 °C. Its relatively high density is due to the presence of multiple hydroxyl groups that contribute to intermolecular hydrogen bonding. |
| Solubility | Glycerol is highly soluble in water. It forms strong hydrogen bonds with water molecules, allowing it to dissolve readily. It is also miscible with many polar organic solvents such as ethanol and methanol. However, it is immiscible with non-polar solvents like hydrocarbons (e.g., benzene, hexane). |
Applications
Food Industry
Glycerol is used as a food additive. It functions as a humectant, preventing food from drying out and maintaining its moisture content. It is commonly used in bakery products, candies, and dairy products. It also acts as a sweetener, thickener, and solvent for flavorings and colorants in food.
Cosmetics and Personal Care
In cosmetics, glycerol is a key ingredient. It serves as a humectant to keep the skin and hair moisturized, as well as a thickener and solvent. It is found in creams, lotions, shampoos, and other personal care products, helping to improve their texture and effectiveness.
Pharmaceutical Industry:
Glycerol is used in pharmaceuticals as a solvent, humectant, and sweetener in oral medications. It is also used in topical preparations to improve the penetration of drugs into the skin and to provide a soothing effect. In addition, it can be used as a component in intravenous solutions.
Industrial Applications
Glycerol is used in the production of plastics and resins, such as alkyd resins used in paints and coatings. It is also used in the manufacture of explosives (e.g., nitroglycerin, which is made from glycerol and nitric acid), in the textile industry as a softener and lubricant, and in the tobacco industry to keep tobacco products moist.
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