Tetramethylbenzene
High-symmetry, high-boiling heavy-aromatic crystalline intermediate for polyimide resins, high-temperature coatings and electronics cleaning.
Product photo plus packaging, storage and loading conditions at our Dongguan facility.
At a Glance
| CAS No. | 95-93-2 |
| Chemical Name | 1,2,4,5-Tetramethylbenzene (durene) |
| Molecular Formula | C10H14 |
| Purity | On request |
| Origin | China |
| Packaging | 210 L steel drum (180 kg) / IBC / ISO tank / small drum |
| Lead Time | 60 working days after deposit |
Product Overview
Durene (1,2,4,5-tetramethylbenzene) is produced from the C10 heavy aromatic fraction through isomerisation, freeze crystallisation and multi-stage vacuum fractionation, which separates the other trimethylbenzene and tetramethylbenzene isomers. It is supplied as a general industrial crystalline grade and as a low-metal electronic high-purity grade. The highly symmetrical tetramethyl structure oxidises predictably, making it the essential feedstock for pyromellitic dianhydride (PMDA); its very high boiling point and extremely slow evaporation also suit it to long, high-temperature baking systems, where it dissolves polyester, epoxy and heat-resistant resins with ease.
Flexible OLED displays, 5G communications and automotive electronics keep expanding polyimide demand and pull durene consumption directly. High-temperature stoving coatings and high-end dyes grow steadily in their own niches, while low-VOC coating regulation pushes formulators from short-lived benzene-type solvents towards high-boiling aromatics. The product is a flammable solid hazardous chemical and its powder can form an explosive dust cloud, so storage is fully sealed and moisture-free, isolated from open flame and strong oxidisers. Spent mother liquor can be recovered by distillation and reused, keeping long-term purchasing cost predictable.
Key Advantages
Irreplaceable Core Precursor for Polyimide Materials
Selective oxidation to PMDA feeds heat-resistant polyimide film — a must-have material for flexible electronics and aerospace insulation, in a supply chain with high entry barriers.
Ultra-High Boiling Point, Slow Evaporation for Long High-Temperature Bakes
Extremely low vapour pressure means the solvent survives long high-temperature processing without volatilising, giving a film free of blisters and pinholes — a dedicated solvent for heat-resistant insulating enamels.
Symmetrical Molecule, Fewer Oxidation By-Products
High selectivity in catalytic oxidation keeps impurities low, so downstream polyimide resin reaches high purity with excellent heat resistance and insulating performance.
High-Purity, Low-Ion Grade for Semiconductor Processes
Trace metals and isomer impurities are tightly controlled, making it suitable for photoresist dilution and high-temperature wafer cleaning with no substrate corrosion or residue.
Applications
Durene serves six distinct industrial segments: polyimide (PI) synthesis, high-temperature industrial stoving coatings, electronics lithography cleaning, high-end dye intermediates, agrochemical additives and liquid crystal monomers.
- Polyimide core feedstock — oxidation to PMDA for flexible OLED substrates, 5G insulating film and heat-resistant PI materials in automotive motors.
- High-temperature industrial insulating enamels — slow-evaporating solvent for heat-resistant motor and transformer enamels and long-life stoving topcoats for hardware.
- Semiconductor lithography support — dilution of high-end photoresists and high-temperature wafer residue cleaning, with low impurities and no damage to precision substrates.
- Organic dye intermediates — the synthesis backbone for high-end disperse and acid dyes, improving colour fastness and weather resistance on fabric.
Technical Specifications
| Appearance | Colourless needle-shaped crystals |
| Purity | On request |
| Molecular Formula | C10H14 |
| CAS No. | 95-93-2 |
| EINECS No. | 202-465-7 |
| Relative Density (water = 1) | 0.838 |
| Flash Point | 81 °C |
| Boiling Point | 196–197 °C |
| Hazard Classification | Class 6.1 organic toxic solid |
| Stability | Stable at ambient temperature when sealed; the powder can form a combustible dust cloud in air, so never store or handle it with strong oxidisers or strong acids |
| Solubility | Insoluble in water; soluble in ethanol, ether and benzene |
| Storage | Cool, dry, sealed hazardous goods warehouse at 37 °C or below, protected from moisture and light. Store separately from oxidisers and equip the warehouse with dust extraction, sand and foam firefighting materials; spark-generating equipment is not permitted. |
Composition
| Component | Concentration | CAS No. |
|---|---|---|
| Tetramethylbenzene | / | 95-93-2 |
Transport & Compliance
| UN No. | UN2930 |
| Hazard Class | Class 6.1 organic toxic solid |
| Packing Group | I |
| HS Code | / |
| Packaging | 180 kg per drum (210 L steel drum) |
UN and HS codes are shown for reference only — please confirm with us before shipment.
FAQ
What is your minimum order quantity?
Our MOQ is one 20GP container — up to 80 drums of 210 L.
What packaging do you offer?
Standard 210 L steel drums, plus IBC totes, ISO tank containers and small drums.
How many drums fit in a 20GP or 40GP, and can you consolidate?
Yes, we consolidate up to 5 product types in one shipment. A 20GP holds up to 80 drums (210 L); a 40GP holds around 130 drums (210 L).
What is the lead time?
About 60 working days after the deposit is received.
Which export documents do you provide?
COA, MSDS, commodity inspection certificate and dangerous goods packaging certificate. We can also assist with Certificate of Origin and other customs paperwork.
What payment terms do you accept?
T/T: 30% deposit, 70% balance against a copy of the Bill of Lading.
Technical Documents
MSDS and batch COA for Tetramethylbenzene are available on request. Tell us your quantity and destination port and we will send the documents with your quotation. Request documents →
Request a Quote for Tetramethylbenzene
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