nDodecyl

Ndodecyl, more commonly written as n-dodecyl, refers to a straight-chain alkyl group containing 12 carbon atoms. The n- prefix indicates a normal, unbranched chain, and the radical has the formula C12H25-. In chemical notation it is often shown as n-C12H25- when attached as a substituent in larger molecules.

n-Dodecyl appears in a variety of compounds, most notably in n-dodecyl alcohol (dodecan-1-ol) and in n-dodecyl sulfate derivatives such as sodium dodecyl sulfate (SDS). The long hydrophobic tail provided by the 12-carbon chain strongly influences the behavior of the associated molecules, especially in surface-active agents. As a component of surfactants, detergents, and emulsifiers, the n-dodecyl group helps reduce surface tension and stabilize dispersed phases, contributing to cleaning, wetting, and foaming properties.

Other examples include various n-dodecyl esters, sulfonates, and acrylate or methacrylate monomers used in polymer chemistry. In these contexts, the n-dodecyl chain acts as a hydrophobic tail that modulates solubility, micelle formation, and interactions with organic and aqueous phases.

Properties of n-dodecyl-containing compounds depend on the functional group attached to the chain. The alkyl portion itself is nonpolar and relatively hydrophobic, often rendering derivatives less soluble in water unless the molecule contains a strongly polar or ionic group.

Safety and handling follow standard practices for long-chain alkyls: many compounds can be irritants or sensitizers; consult specific material safety data sheets for detailed hazard and handling information.