Introduction to 1,2 - Propanediol (Propylene Glycol)
1,2-Propanediol, also known as propylene glycol, is an organic compound (a diol) with the chemical formula C₃H₈O₂. Propylene glycol is typically a slightly sweet-tasting, odorless, colorless, and transparent viscous liquid. Chemically, propylene glycol belongs to the category of glycols and is miscible with a variety of solvents, including water, acetone, and chloroform. Propylene glycol can be manufactured through the hydration of propylene oxide and is primarily used to produce polymers. However, it is also utilized as a food additive, with the E number E1520. Propylene glycol has another isomer, 1,3-propanediol.
product Specification
| Item | Unit | Specification |
| PG content | Wt % | 99.50 min |
| Moisture | % | 0.20 max |
| Density (20℃) | g/cm3 | 1.035-1.040 |
| Index of refraction | nD20 | 1.428-1.435 |
| Acidity | % | 0.02 max |
| Distillation range | oC | 183-190 |
| Colourity (Pt-Co) | APHA | 16 |
| Appearance | Colorless, Viscous, Transparent liquid |
Applications
Industrial Raw Materials: It acts as a fundamental raw material for resins, plasticizers, surfactants, emulsifiers, and demulsifiers. It also functions as an antifreeze and heat carrier, ensuring the smooth operation of various industrial systems under extreme temperature conditions.
Chemical Reagents: In gas chromatography, it serves as a fixative and solvent. Its antifreeze properties make it useful in different chemical processes, and it can also act as a plasticizer and dehydrant.
Pharmaceutical Industry: In the pharmaceutical field, it is frequently employed as a solvent, softener, and excipient in the manufacture of various ointments and creams, facilitating the effective delivery of active ingredients.
Daily Life Applications: It is used in air deicing liquids, refrigerants, and antifreeze solutions. Moreover, it finds its way into food and spices, fragrances, cosmetics, and personal health products, enhancing their quality and performance.
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