Ortho-xylene / o-Xylene (CAS 95-47-6) is a specific isomer of xylene, while "xylene" is a mixture and a general term used in the chemical market.
Many buyers in search of industrial solvents often mistakenly assume that the terms "o-xylene" and "xylene" refer to the same product. In reality, o-xylene is a specific chemical isomer, whereas "xylene" typically refers to a mixed product containing various isomers. Understanding the distinction between the two is crucial when selecting raw materials for applications in chemical manufacturing, coatings, plastics, resins, and solvents.
Differences in Chemical Definition
Xylene typically refers to a mixture of three isomers: ortho-xylene, meta-xylene, and para-xylene.
O-Xylene (Ortho-Xylene, CAS 95-47-6) is one of the three xylene isomers. Its molecular structure contains two methyl groups attached to adjacent carbon atoms on a benzene ring. O-Xylene is typically supplied at high purity, often exceeding 99%, and is primarily used as a chemical intermediate rather than as a general-purpose solvent.
O-Xylene vs Xylene
| Feature | O-Xylene | Mixed Xylene |
| Composition | Single isomer | Blend of isomers |
| CAS Number | 95-47-6 | Varies by grade |
| Purity | High-purity product | Mixed composition |
| Main Function | Chemical feedstock | Industrial solvent |
| Typical Industries | Plastics, resins, chemicals | Paints, coatings, construction |
| Downstream Processing | Commonly required | Often used directly |
Differences in Applications
o-Xylene CAS 95-47-6 is primarily used as a chemical intermediate, particularly in the production of phthalic anhydride, plasticizers, resins, and coatings.
Xylene (the mixture) is more commonly used as a general-purpose industrial solvent in paints, inks, adhesives, and cleaning agent formulations.
| Product | Best For | Common Buyer Industries |
|---|---|---|
| o-Xylene | Chemical synthesis | Plastics, resins, coatings |
| Xylene (Mixed) | Solvent use | Paints, inks, construction |
Ortho-xylene is typically supplied at high purity (≥99%), making it more suitable for downstream chemical synthesis.
Which Product Should You Choose?
Choose o-xylene if your process requires a high-purity raw material for chemical synthesis or phthalic anhydride production.
Choose mixed xylene if your primary goal is solvent performance in coatings, paints, inks, adhesives, or cleaning applications.
The correct choice depends on whether the product will be used as a reaction feedstock or as a solvent.
Frequently Asked Questions
Q: Is o-xylene the same as xylene?
A: No. O-xylene is a single xylene isomer, while xylene generally refers to a mixture of isomers.
Q: Why is o-xylene more expensive than mixed xylene?
A: O-xylene requires additional separation and purification processes, resulting in higher purity and greater suitability for chemical manufacturing.
Q: What is o-xylene mainly used for?
A: The largest application of o-xylene is the production of phthalic anhydride, a key raw material for plasticizers, alkyd resins, and polyester products.
Q: Can mixed xylene replace o-xylene?
A: In most chemical synthesis applications, mixed xylene cannot directly replace o-xylene because the purity and isomer composition may affect reaction efficiency and product quality.
Q: Which industries buy o-xylene?
A: Major buyers include manufacturers of plasticizers, phthalic anhydride, alkyd resins, polyester resins, and specialty chemicals.
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