About Propylene Glycol
Propylene Glycol
Propylene Glycol, also called 1,2-propanediol or propane-1,2-diol, is an organic compound (double alcohol) with formula C3H8O2 or HO-CH2-CHOH-CH3. It is a colorless, nearly odorless, clear, viscous liquid with a faintly sweet taste, hygroscopic and miscible with water, acetone, and chloroform. The compound is sometimes called propylene glycol to distinguish it from the isomer propane-1,3-diol HO-(CH2)3-OH, also called propylene glycol. |
Specification:| Items | Units | Pharmaceutical Grade | Food Grade | First Grade | Qualified Grade | | Purity | % | 99.8 | 99.6 | 99.5 | 99.0 | | Water | % | 0.2 | 0.2 |
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| | Initial boiling point |
| 182 | 180 |
|
| | Drying point |
| 189 | 191 |
|
| | Distillation Range |
| 184~189 | 183~190 | 183~190 | 182~190 | | Color(Pt-Co) |
| 10 | 10 | 15 | 25 | | Ash | % | 0.01 | 0.01 | 0.01 | 0.02 | | Heavy Metal(Measured with Pb) | ppm | 6 | 6 |
|
| | Arsenic | ppm | 5 | 5 |
|
| | chlorides(Measured with Cl-) | ppm | 10 | 10 |
|
| | Sulphates(Measured with SO42-) | ppm | 10 | 10 |
|
| | Density | (25 C)g/cm3 | 1.037~1.039 | | Appearance | Colorless, transparent and sticky liquid | |
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| PACKAGES : Packed in iron or high density drums of 2000.5kg net each
USAGES : Propylene glycol is a raw material for producing unsaturated of plasticizer, dehydrant, surface active agent, firming agent and binder. Moreover, PG can be used as antiseptics, ice inhibitor and moisture preserver of tobacco. |
Versatile Industrial ApplicationsPropylene Glycol is widely utilized across several industries. In pharmaceuticals, it is renowned for its role as a solvent and carrier for active ingredients. Its humectant properties make it valuable in cosmetic products, while its use in food ensures moisture retention. Additionally, it acts as an effective antifreeze and coolant owing to its thermal stability and low toxicity. The adaptability of this chemical makes it indispensable for manufacturers and product developers.
Handling and Storage RecommendationsTo maintain product quality and stability, propylene glycol should be stored in a cool, dry place, away from direct sunlight and sources of ignition. Packaging options like drums, IBCs, or bulk containers help accommodate various industrial needs. With a flash point of 104C and a shelf life of up to two years under proper storage, this liquid remains safe and effective when handled according to instructions.
FAQs of Propylene Glycol:
Q: How is industrial-grade propylene glycol typically used in pharmaceuticals and cosmetics?
A: Industrial-grade propylene glycol functions chiefly as a solvent and humectant in pharmaceuticals and cosmetics. It helps dissolve active ingredients, enhances their absorption, and prevents products from drying out, thereby extending shelf life and ensuring consistent texture.
Q: What benefits does propylene glycol offer when used as an antifreeze or coolant?
A: Propylene glycols low freezing point (59C) and high boiling point (188C) make it highly effective as an antifreeze and coolant. It protects systems from freezing and overheating, while its relatively low toxicity enhances safety compared to other glycols.
Q: When should you use propylene glycol in food applications?
A: Propylene glycol is utilized in food processing as a humectant, solvent, and stabilizer. It assists in retaining moisture, dissolving flavors or colors, and contributing to a uniform texture in processed foods and beverages.
Q: Where is the best place to store propylene glycol to maximize its shelf life?
A: For optimal shelf life and product integrity, propylene glycol should be stored in a cool, dry placepreferably away from sunlight and heat sources. Use tightly sealed drums, IBCs, or bulk containers to prevent contamination and evaporation.
Q: What are the standard packaging sizes available for propylene glycol distribution?
A: Propylene glycol is commonly supplied in 200 kg drums, Intermediate Bulk Containers (IBC), and bulk shipments. This flexible packaging facilitates transport, storage, and handling for various industrial requirements.
Q: Can you describe the process for safe handling of liquid propylene glycol?
A: Safe handling involves using appropriate personal protective equipment (PPE), ensuring proper ventilation, and preventing direct skin or eye contact. Transfer the liquid carefully from drums or IBCs, and avoid exposure to ignition sources due to its flash point of 104C.