Para-Xylene is an aromatic hydrocarbon isomer and a critical petrochemical feedstock utilized as the primary precursor for Terephthalic Acid (TPA) and Dimethyl Terephthalate (DMT) in polyester manufacturing. Commonly identified in the industry as 1,4-Dimethylbenzene or p-Xylol, this volatile liquid is essential for synthesizing polyethylene terephthalate (PET) fibers and films through catalytic oxidation processes. We offer this essential chemical intermediate with competitive factory pricing to support large-scale industrial operations. Our logistics framework ensures reliable bulk supply availability and customized specifications, fully accompanied by MSDS, TDS, COA documentation for quality assurance and regulatory compliance.
Para-Xylene CAS 106-42-3
- CAS: 106-42-3
- Synonyms: 1,4-Dimethylbenzene, p-Xylol, p-Methyltoluene, 1,4-Xylene, Para-xylol
- Einecs: 203-396-5
- Molecular Formula: C8H10
- Grade: Industrial grade 99%
- Package: 200kg iron drum or 50kg plastic drum packing
Product Description
Chemical formulaC8H10
Molecular weight 106.167
CAS accession number 106-42-3
EINECS accession number 203-396-5
Melting point 13.263 °C
The boiling point is 138.37 °C
Density relative density 0.8611 (20°C/4°C water).)
It is a colorless liquid in appearance and crystallizes into colorless flakes or prisms at low temperatures
Flash point 27.2 °C
Applications are used in the production of poly fibers, polyester containers, coatings, dyes, etc
Refractive index (nD25) 1.4958, (nD21) 1.5004
Storage conditions
Store in a cool, ventilated and dry warehouse, away from fire
Basic uses:
It is used to produce terephthalic acid, and then polyester resins such as ethylene terephthalate and butylene glycol. Polyester resin is the raw material for the production of polyester fibers, polyester sheets, and polyester hollow containers. Polyester fiber is the largest synthetic fiber in our country. It is also used as a raw material for coatings, dyes, and pesticides.Small to Medium Quantity Orders Welcome (FCL)
FAQ - Technical & Supply Chain
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Q:
Does Para-Xylene correspond to the solvent-grade mixed isomers or the specific 1,4-structure?
A: Para-Xylene is verified under CAS 106-42-3 as the high-purity 1,4-dimethylbenzene isomer, distinguishing it from Ortho-Xylene, Meta-Xylene, or Mixed Xylenes to ensure the specific chemical symmetry required for efficient oxidation into terephthalic acid. -
Q:
What is the primary functional role of Para-Xylene in the polyester value chain?
A: Para-Xylene is typically applied as the exclusive feedstock for manufacturing Purified Terephthalic Acid (PTA) and Dimethyl Terephthalate (DMT), which are the essential monomers polymerized to create Polyethylene Terephthalate (PET) fibers for textiles and plastic bottles.
Documents
Documents and Product Support
For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.
- COA for batch-based quality reference
- TDS for key physical and chemical information
- SDS / MSDS for handling, storage, and safety reference
- Packing information for sample, trial, and bulk orders
- Technical communication based on application and specification requirements
Quotation
Information to Confirm Before Quotation
Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.
- Product name and CAS number
- Application or intended end use
- Required purity, grade, or specification
- Sample quantity, trial order, or bulk demand
- Preferred packing form or net weight
- Destination country or port
- Required documents or compliance expectations
Storage & Handling
Packaging, Storage, and Handling Notes
Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.
Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.
Supply Support
Sample, Bulk Order and Repeat Supply Support
Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.
For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.
