4-Dodecylbenzenesulfonic acid

4-十二烷基苯磺酸

Also known as: DODECYLBENZENESULFONIC ACID, 4-dodecylbenzenesulfonic acid, mixture of isomers, 4-dodecylbenzene-1-sulfonic acid, 4-dodecylbenzenesulphonic acid, ALKYLARYLSULFONIC ACID, ALKYLBENZENESULFONIC ACID, Benzenesulfonic acid, 4-dodecyl-, N-DODECYLBENZENESULFONIC ACID, NAXEL AAS-98S, p-dodecylbenzenesulfonic acid, p-dodecylbenzenesulphonic acid

4-Dodecylbenzenesulfonic acid (CAS 121-65-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H30O3S and a molecular weight of 326.494 g/mol. It is also known as DODECYLBENZENESULFONIC ACID, 4-dodecylbenzenesulfonic acid, mixture of isomers and 4-dodecylbenzene-1-sulfonic acid. Key properties include a boiling point of 82 °C, a density of 1.1±0.1 g/cm3 and a flash point of 85 °F. GHS signal word: Danger. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
121-65-3
Jingsj CID
J-1956837-9
Molecular Formula
C18H30O3S
Chinese Name
4-十二烷基苯磺酸
Molecular Weight
326.494 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Boiling Point82 °C
Density1.1±0.1 g/cm3
Flash Point85 °F

GHS Safety & Compliance

CorrosionSignal word: Danger

Frequently Asked Questions

What is the CAS number of 4-Dodecylbenzenesulfonic acid?

The CAS number of 4-Dodecylbenzenesulfonic acid is 121-65-3.

What are the molecular formula and molecular weight of 4-Dodecylbenzenesulfonic acid?

4-Dodecylbenzenesulfonic acid has molecular formula C18H30O3S and molecular weight 326.494 g/mol.

Is 4-Dodecylbenzenesulfonic acid hazardous?

4-Dodecylbenzenesulfonic acid has GHS signal word Danger.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "4-Dodecylbenzenesulfonic acid (CAS 121-65-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1956837-9 (accessed 2026-10-23).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.