Neopentyl Benzenesulfonate (CAS 75620-67-6) has a molecular formula of C??H??O?S and a molecular weight of 228.31 g/mol, consisting of a neopentyl group (C(CH?)?CH?-) and a benzenesulfonate moiety (-O?SO-C?H?). As a sulfonate ester intermediate, it is widely used in organic synthesis (e.g., nucleophilic substitution reactions) and polymer modification. It should be stored sealed in a cool, dry place to avoid hydrolysis, ensuring its reactivity and stability for industrial or laboratory applications.