Barium dinonylnaphthalenesulfonate

Barium dinonylnaphthalenesulfonate (CAS 25619-56-1, EC 247-132-7) is an organometallic barium sulfonate compound commercially known under trade names including Na Sul BSN, Nacorr 1151, Nacorr 1153, and T 705. It carries no assigned E-code and is registered under REACH within the European regulatory framework.

In lubricant and metalworking formulations, it functions as a corrosion inhibitor by forming a protective barium sulfonate film on ferrous and non-ferrous metal surfaces, displacing moisture and preventing oxidative attack. It is also incorporated into rust-preventive oils and engine lubricants, where its antioxidant properties help retard oil degradation under thermal stress.

Barium dinonylnaphthalenesulfonate is supplied in industrial grades suitable for lubricant and fuel additive applications and is subject to REACH registration requirements for import and use within the EU. Procurement quantities typically range from drum to IBC and bulk formats; buyers should confirm grade specification and sulfonate content with the supplier prior to ordering.