o-Xylene (CAS 95-47-6) is a single-isomer aromatic hydrocarbon, primarily used as a chemical intermediate in the production of phthalic anhydride, plasticizers, and resins. Mixed xylenes, conversely, are a mixture of xylene isomers; they are frequently employed as industrial solvents in coatings, paints, inks, adhesives, and cleaning formulations.
What Is Ortho-Xylene?
Ortho-xylene (o-xylene, CAS 95-47-6) is a single-isomer aromatic hydrocarbon with consistent chemical behavior. It is primarily used as a chemical intermediate rather than a general-purpose solvent.
Typical applications include:
- Phthalic anhydride production
- Plasticizers and alkyd resins
- Polyester and coating intermediates
Related Product: High Purity O-Xylene (ortho-xylene) Solvent CAS 95-47-6
What Is Mixed Xylene?
Mixed xylene is a blend of xylene isomers, typically containing: m-xylene (major component), o-xylene, p-xylene, small amounts of ethylbenzene.
Common uses include:
- Paints and coatings
- Adhesives and inks
- Cleaning and degreasing agents
With growing demand from coatings, plastics, and chemical intermediates, both ortho-xylene and mixed xylene remain essential products in international trade. Choosing the right type depends on your end use.
O-Xylene vs Mixed Xylene: Key Differences
| Ortho-Xylene | Mixed Xylene | |
|---|---|---|
| CAS Number | 95-47-6 | 1330-20-7 |
| Composition | Single isomer | Blend of isomers |
| Main Function | Chemical intermediate | Industrial solvent |
| Purity Consistency | High | Variable |
| Solvent Strength | Moderate | Strong |
| Main Industries | Chemical manufacturing | Paints, coatings, inks |
| Cost | Usually higher | More economical |
| Commercial Use | Specialized | General industrial use |
| Evaporation Characteristics | Controlled | Balanced |
How to Choose: Ortho-xylene vs. Mixed Xylenes
The choice depends entirely on your specific production scenario and technical specifications.
Select Ortho-xylene under the following circumstances:
- Your process requires a high-purity chemical intermediate.
- There are strict requirements regarding the uniformity of molecular composition.
- The target product being manufactured is Phthalic Anhydride.
- Stable and predictable reaction behavior is required.
- Your business operations encompass the production of resins and plasticizers.
For downstream fine chemical manufacturing, where the purity of raw materials and the stability of their components directly determine the quality of the final product, Ortho-xylene represents the more practical and appropriate choice.
Select Mixed Xylenes under the following circumstances:
- You are seeking a cost-effective industrial solvent.
- Your product line includes paints and coatings.
- There are high demands regarding solvency power.
- Your production focus lies in the fields of adhesives and printing inks.
- Large-volume solvent supplies are required.
Thanks to their excellent cost-performance ratio and superior solvency power, Mixed Xylenes are widely utilized across a broad spectrum of general industrial solvent applications.
Is ortho-xylene cheaper than mixed xylenes?
No, the price of o-xylene is consistently higher than that of mixed xylenes.
o-Xylene
- Purity: A high-purity chemical consisting of a single isomer (≥98–99%), isolated and extracted from mixed xylenes.
- Production: Requires an energy-intensive, multi-stage distillation/isomerization process to separate the ortho-isomer from the mixed xylene stream; this significantly increases both capital investment and operating costs.
- Price: Approximately 9,300 RMB/ton; Globally: Typically 1,000–1,350 USD/ton.
Mixed Xylenes
- Composition: An unseparated industrial mixture containing various xylene isomers (ortho-, meta-, and para-) as well as ethylbenzene, without undergoing further purification.
- Production: A direct byproduct of the naphtha reforming process-requiring no additional separation steps-resulting in lower production costs.
- Price: Approximately 6,400–7,000 RMB/ton (market price); Globally: Typically 650–900 USD/ton.
The price of o-xylene is approximately 30–50% higher than that of mixed xylenes, directly reflecting its status as a purified intermediate tailored for specific applications; in contrast, mixed xylenes primarily serve as a low-cost, general-purpose solvent.
Frequently Asked Questions
Is ortho-xylene the same as mixed xylene?
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No. Ortho-xylene is a single xylene isomer, while mixed xylene is a blend of multiple xylene isomers and ethylbenzene.
Which is cheaper: ortho-xylene or mixed xylene?
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Mixed xylene is generally more economical because it is produced and sold as a blended industrial solvent.
What is o-xylene mainly used for?
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O-xylene is mainly used in the production of phthalic anhydride, plasticizers, alkyd resins and chemical intermediates.
Can mixed xylene replace ortho-xylene?
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Not always. Mixed xylene may work well for solvent applications, but ortho-xylene is preferred when specific chemical reactions require a single isomer.
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