4-Ethylbenzenesulfonic acid
4-Ethylbenzenesulfonic acid (CAS: 98-69-1), a key organic building block with the formula C2H5C6H4SO3H, is supplied by Tech Serve Solutions. This sulfonic acid is crucial in chemical synthesis, particularly for its role in developing conductive polymer materials. With a molecular weight of 186.23 g/mol, it serves as a valuable intermediate in various research and development applications within the scientific community. TSS ensures high standards for this essential chemical compound.

Conductive Polymer Doping
4-Ethylbenzenesulfonic acid is utilised as a dopant for high-conducting polypyrrole thin films. This application is critical in the development of advanced electronic materials and sensors.
Organic Synthesis Intermediate
As an organic building block, this compound serves as a versatile intermediate in the synthesis of more complex organic molecules. Its sulfonic acid functionality allows for various chemical transformations.
Research and Development
The compound is employed in laboratory settings for research purposes, exploring new synthetic routes and material properties. Its specific structure makes it a useful reagent in academic and industrial R&D.
| Molecular weight | 186.23 |
|---|---|
| Linear formula | C2H5C6H4SO3H |
| Assay | 95% |
| Density | 1.229 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.5331(lit.) |
| Application | 4-Ethylbenzenesulfonic acid was used to dope high conducting polypyrrole thin films1. |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 2586 8/PG 3 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-27-28-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 4-Ethylbenzenesulfonic acid used for?
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4-Ethylbenzenesulfonic acid is primarily used as a dopant for high-conducting polypyrrole thin films and as an intermediate in organic synthesis for research and development purposes.
What are the CAS number and formula for 4-Ethylbenzenesulfonic acid?
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The CAS number is 98-69-1 and the linear formula is C2H5C6H4SO3H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Ethylbenzenesulfonic acid with an assay of 95%. TSS does not represent this product as USP, BP, or EP grade.
How should 4-Ethylbenzenesulfonic acid be handled safely?
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4-Ethylbenzenesulfonic acid is a Danger hazard (H314) causing severe skin burns and eye damage. It requires handling with full protective equipment, including a face shield, gloves, goggles, and appropriate respiratory protection. Ensure adequate ventilation and follow all safety precautions.
Is 4-Ethylbenzenesulfonic acid available for export?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 4-Ethylbenzenesulfonic acid, adhering to international shipping regulations.
How can I request a sample or quote for 4-Ethylbenzenesulfonic acid?
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Please contact our sales team via the website or by phone to request a sample or obtain a quotation for 4-Ethylbenzenesulfonic acid.
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