The chemical formula of sodium dodecylbenzene sulfonate (also known as linear alkylbenzene sulfonate or LAS) is:

C₁₂H₂₅C₆H₄SO₃Na

Here's a breakdown:

* C₁₂H₂₅: Represents the dodecyl chain (a 12-carbon linear alkyl chain)

* C₆H₄: Represents the benzene ring

* SO₃: Represents the sulfonate group

* Na: Represents the sodium ion

This formula represents the most common form of LAS, where the dodecyl chain is linear. There are also branched isomers of LAS, but the linear form is the most environmentally friendly and commonly used.