4-Dodecylbenzenesulfonic acid
4-Dodecylbenzenesulfonic acid (CAS: 121-65-3), with the molecular formula C18H30O3S and a molecular weight of 326.49 g/mol, is a key anionic surfactant. It functions as an effective detergent and emulsifier. This compound is widely utilised in various industrial applications, including its role as a chemical intermediate in synthesis processes and as a component in cleaning formulations. Its robust chemical properties make it suitable for demanding applications.

Detergent Formulations
As an anionic surfactant, 4-Dodecylbenzenesulfonic acid is a primary component in many industrial and household cleaning products. It effectively lowers surface tension, aiding in the removal of grease and grime.
Emulsifier
Its amphipathic nature allows it to stabilise emulsions by facilitating the mixing of immiscible liquids. This is crucial in various industrial processes and product formulations.
Chemical Synthesis
This compound serves as a valuable building block and intermediate in organic synthesis. Its functional groups allow for further chemical modification in the creation of more complex molecules.
Industrial Processes
Utilised in a range of industrial applications, including textile processing and metalworking fluids, where its surfactant properties are beneficial.
| Molecular weight | 326.49 |
|---|---|
| Empirical formula | C18H30O3S |
| Assay | ≥95% |
| Density | 1.06 g/mL at 20 °C(lit.) |
| Impurities tested | ≤2% H2SO4 |

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 |
|---|---|
| Transport (UN / ADR) | UN 2586 8/PG 3 |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Description | anionic |
|---|
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-Dodecylbenzenesulfonic acid used for?
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4-Dodecylbenzenesulfonic acid is primarily used as an anionic surfactant in detergent formulations, as an emulsifier in various industrial applications, and as a building block in chemical synthesis.
What are the CAS number and formula for 4-Dodecylbenzenesulfonic acid?
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The CAS number for 4-Dodecylbenzenesulfonic acid is 121-65-3, and its molecular formula is C18H30O3S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Dodecylbenzenesulfonic acid with an assay of ≥95%. We do not represent this product as USP, BP, or EP grade unless explicitly stated.
How should 4-Dodecylbenzenesulfonic acid be handled safely?
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4-Dodecylbenzenesulfonic acid is classified as corrosive (Danger, H314) and can cause severe skin burns and eye damage. Appropriate personal protective equipment, including gloves, goggles, and face shields, must be worn. Ensure adequate ventilation and refer to the Safety Data Sheet for detailed handling instructions.
Is 4-Dodecylbenzenesulfonic acid regulated?
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Based on the provided data, 4-Dodecylbenzenesulfonic acid is not indicated as a controlled substance. However, it is classified with specific hazard statements (H314) and requires careful handling.
How is 4-Dodecylbenzenesulfonic acid packed and exported?
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4-Dodecylbenzenesulfonic acid is shipped under UN 2586, Hazard Class 8, Packing Group III. Tech Serve Solutions, as a global supplier, ensures compliant packing and expert handling for international export.
How can I request a quote or sample for 4-Dodecylbenzenesulfonic acid?
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To request a quote or sample of 4-Dodecylbenzenesulfonic acid, please contact our sales department through the website or by phone. Our team will assist you promptly.
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