2-Naphthalenesulfonyl chloride（Cat No.:L012598）is an aromatic sulfonyl chloride derivative with the sulfonyl group (-SO₂Cl) attached to the second position of the naphthalene ring. It appears as a white to pale yellow crystalline solid and is moisture-sensitive, reacting readily with water to form sulfonic acids. This compound is a key reagent in organic synthesis, commonly used for sulfonamide formation, peptide coupling, and protecting group strategies. Its reactivity toward amines and alcohols makes it valuable in pharmaceutical, agrochemical, and dye synthesis. Proper handling is essential due to its lachrymatory and corrosive nature.