Diethylbenzene
Diethylbenzene (CAS: 25340-17-4), a clear liquid with the molecular formula C6H4(C2H5)2 and a molar mass of 134.22 g/mol, is an organic compound primarily utilised as a versatile building block in chemical synthesis. It serves as a key intermediate in the production of various organic chemicals and polymers. Its properties make it valuable in research and industrial applications requiring specific aromatic functionalities.

Organic Synthesis Intermediate
Diethylbenzene acts as a crucial starting material or intermediate in the synthesis of more complex organic molecules. Its aromatic structure with two ethyl groups allows for various substitution reactions, enabling the creation of diverse chemical entities for research and development.
Polymer Production
This compound can be employed in the development and production of specialized polymers. Its incorporation into polymer chains can modify material properties such as flexibility, thermal stability, or solubility.
Research and Development
As a readily available aromatic building block, Diethylbenzene is frequently used in academic and industrial research laboratories for exploring new synthetic routes and novel chemical structures.
| Molecular weight | 134.22 |
|---|---|
| Linear formula | C6H4(C2H5)2 |
| Assay | 95% |
| Boiling point | 180-182 °C(lit.) |
| Density | 0.87 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.495(lit.) |
| Vapour pressure | 0.99 mmHg (20 °C) |
| Vapour density | ~4.6 (vs air) |




Hazard statements
- H226Flammable liquid and vapour
- H304May be fatal if swallowed and enters airways
- H315Causes skin irritation
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P301IF SWALLOWED
- P331Do NOT induce vomiting
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 57 °C / 134.6 °F |
| Transport (UN / ADR) | UN 2049 3 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xi,N |
| Risk statements (R) | 38-50/53-65 |
| Safety statements (S) | 60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 5 % |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Diethylbenzene used for?
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Diethylbenzene is primarily used as an intermediate in organic synthesis and in the production of polymers. It also finds application in chemical research and development.
What is the CAS number and chemical formula for Diethylbenzene?
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The CAS number for Diethylbenzene is 25340-17-4, and its chemical formula is C6H4(C2H5)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Diethylbenzene with an assay of 95%. This product is typically considered a technical or research grade, and TSS does not represent it as meeting USP, BP, or EP pharmacopoeia standards.
How should Diethylbenzene be handled safely?
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Diethylbenzene is a flammable liquid and vapour (H226) that may be fatal if swallowed and enters airways (H304). It causes skin irritation (H315) and is very toxic to aquatic life with long-lasting effects (H410). Always handle with appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, in a well-ventilated area, and avoid release to the environment. Refer to the safety data sheet for comprehensive guidance.
Is Diethylbenzene a controlled substance?
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The provided safety data does not indicate that Diethylbenzene is a controlled substance.
How is Diethylbenzene packed and shipped?
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Diethylbenzene is shipped as UN 2049, Class 3, Packing Group III, indicating it is a flammable liquid. Packaging complies with international transport regulations for hazardous materials. Tech Serve Solutions is a global supplier and exporter.
How can I request a quote or sample for Diethylbenzene?
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To request a quote or a sample of Diethylbenzene, please contact our sales team through the website or by phone, providing your specific requirements.
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