Barium dinonylnaphthalenesulfonate

Barium dinonylnaphthalenesulfonate (CAS 25619-56-1) is an oil-soluble barium salt used as a corrosion inhibitor, antioxidant, and detergent additive in petroleum-based formulations. It belongs to the dinonylnaphthalenesulfonate family of overbased or neutral sulfonates that protect metal surfaces in aggressive service environments during industrial operations.

In lubricant and grease formulations, it neutralizes acidic by-products of oxidation, extending service life in high-temperature and high-load applications for machinery. Metalworking fluids rely on it to prevent rust and corrosion on ferrous and non-ferrous metal surfaces during cutting, forming, and storage of various industrial parts.

Fuel system additives and engine oils incorporate it as a detergent-dispersant, keeping metal components clean under thermal stress and preventing the buildup of sludge. It also functions as a rust-preventive component in preservation oils and protective coatings applied to steel parts during shipping and long-term storage across the globe.

Barium dinonylnaphthalenesulfonate is supplied as a viscous liquid or dissolved in hydrocarbon solvent at varying active-content concentrations for specific manufacturing needs. Both neutral and overbased grades are available, with the overbased form carrying higher total base number for acid-neutralizing applications in Technical grade specifications.