Xylene is a mixture of three isomers - o-Xylene (Ortho-Xylene, CAS 95-47-6), m-Xylene (Meta-Xylene, CAS 108-38-3), and p-Xylene (Para-Xylene, CAS 106-42-3).
All three are aromatic hydrocarbons composed of a benzene ring with two methyl groups, but their positions on the ring differ. This structural difference gives each isomer distinct physical, chemical, and industrial properties, which are important for buyers sourcing high-purity xylene for chemical production or industrial applications.
Physical Property Differences
Each xylene isomer can be distinguished by its melting point and boiling point, which are key indicators during product identification and quality control.
| Isomer | Chemical Name | Melting Point (°C) | Boiling Point (°C) | Appearance |
|---|---|---|---|---|
| o-Xylene | 1,2-Dimethylbenzene | -26 ~ -23 | 143 ~ 145 | Colorless transparent liquid |
| m-Xylene | 1,3-Dimethylbenzene | -48 | 139 | Colorless liquid |
| p-Xylene | 1,4-Dimethylbenzene | -25.5 | 144.4 | Colorless crystal or liquid |
Chemical Characteristics
Although all xylene isomers are relatively stable, their reactivity and oxidation behavior can vary slightly.
They can undergo substitution, oxidation, and addition reactions, which makes them valuable intermediates in organic synthesis. The reactivity differences are particularly relevant for manufacturers producing solvents, resins, and aromatic derivatives.
Key Industrial Uses
Each xylene isomer serves distinct industrial purposes:
- o-Xylene (Ortho-Xylene) – Used in phthalic anhydride production, coatings, adhesives, and as a high-purity solvent for electronics and chemical synthesis.
- m-Xylene (Meta-Xylene) – Commonly used to produce isophthalic acid, which improves the durability of PET resins and coatings.
- p-Xylene (Para-Xylene) – The most commercially important isomer, used mainly to produce Purified Terephthalic Acid (PTA) and Dimethyl Terephthalate (DMT). These are critical raw materials for Polyethylene Terephthalate (PET) resin and polyester fiber production - essential for textiles, plastic bottles, and packaging industries.
How to Choose the Right Xylene for Your Process
When selecting a xylene isomer, consider:
- Purity level requirements (industrial, reagent, or analytical grade)
- End-use industry (coatings, polymers, petrochemicals, or solvents)
- Storage and safety conditions, as all xylene types are flammable and should be stored below 25°C in a well-ventilated area
Industrial grade p-Xylene 99% supplier-Gneebio
Gneebio supplies high-purity 1,4-Dimethylbenzene (99%) that meets national quality standards. The product is packaged in drums to ensure safe transportation and stable quality.
For more information about 1,4-Dimethylbenzene applications and product details, please contact us.
