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.

Where is Barium dinonylnaphthalenesulfonate used?

• Lubricants and greases: neutralizes acidic oxidation by-products, extending service life in high-temperature and high-load machinery
• Metalworking fluids: prevents rust and corrosion on ferrous and non-ferrous surfaces during cutting, forming, and storage
• Fuel system additives and engine oils: detergent-dispersant that keeps metal components clean under thermal stress and prevents sludge buildup
• Preservation oils and protective coatings: rust-preventive component for steel parts during shipping and long-term storage
• It belongs to the dinonylnaphthalenesulfonate family of overbased or neutral sulfonates that protect metal surfaces in aggressive service environments.

Good to know: Neutral and overbased grades exist; the overbased form carries a higher total base number for acid-neutralizing applications.

Commercial specifications

• Viscous liquid or dissolved in hydrocarbon solvent
• Varying active-content concentrations
• Neutral and overbased grades