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Propylene glycol (PG) is a colorless, odorless, and hygroscopic liquid that is widely used in various industrial applications. It is synthesized from propylene oxide and is known for its low toxicity and high solvency properties. PG is commonly utilized as a solvent, humectant, and preservative in food, pharmaceuticals, and personal care products.
| Chemical formula | C3H8O2 |
| Purity | Typically 99% or higher |
| Molecular weight | 76.09 g/mol |
| Boiling point | 188.2 °C |
| Freezing point | -59 °C |
| Viscosity | Approx. 60 cP at 25 °C |
When selecting propylene glycol, buyers should consider the intended application, as different grades may be required for food, pharmaceutical, or industrial use. It's important to specify the desired purity level and any relevant certifications, such as USP or EP standards, if applicable. Additionally, buyers should indicate the quantity needed to ensure accurate pricing and availability.
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It is used in food, pharmaceuticals, cosmetics, and industrial applications.
Yes, it is generally recognized as safe when used in food and pharmaceuticals.
It should be stored in a cool, dry place away from direct sunlight.
Yes, it is commonly used as a non-toxic antifreeze agent.
It is biodegradable and considered to have low environmental toxicity.
Propylene glycol is less toxic and safer for food and pharmaceutical use compared to ethylene glycol.