What Is p-Xylene (CAS 106-42-3) ?
Paraxylene is also known as p-Xylene and primarily serves as a building-block chemical to create PET plastics and polyester. Bottles made from PET plastic are widely used as containers for water, sodas and other beverages because PET is lightweight, shatter-resistant and strong.
What Are the Physical Properties of p-Xylene?
| Appearance | Colorless, transparent liquid |
| Odor | Mild aromatic odor |
| Melting Point | 13.2 °C |
| Boiling Point | 138.3 °C |
| Density (20 °C) | ≈ 0.861 g/cm³ |
| Vapor Pressure (25 °C) | ≈ 8.7 mmHg |
| Flash Point | ≈ 25 °C (closed cup) |
| Auto-ignition Temperature | ≈ 528 °C |
| Solubility in Water | Insoluble |
| Solubility in Organic Solvents | Highly soluble |
P-Xylene is mainly used as a raw material for the production of polyester fibers and resins, coatings, dyes, and pesticides. It is also used as a standard substance and solvent for chromatographic analysis, and is also used in organic synthesis.
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