1-(2-hydroxy-3-sulfopropyl)pyridinium betaine

1-(2-Hydroxy-3-sulfopropyl)pyridinium betaine (CAS 3918-73-8), also known as Pyridinium Hydroxy Propyl Sulphobetaine or PPS-OH, is a zwitterionic surfactant used in specialty industrial formulations.

Where is 1-(2-hydroxy-3-sulfopropyl)pyridinium betaine used?

• Electroplating and PCB manufacturing: leveling and brightening additive
• Copper plating baths: improves deposit uniformity on complex surface geometries
• Metalworking fluids: enhances emulsion stability and surface wetting on metal substrates
• Electronics manufacturing: supports surface preparation with consistent wetting and low foam
• Specialty lubricants: compatible with aqueous systems and stable emulsification of oil-water systems under mechanical stress
• It functions as a surface modifier and wetting agent where controlled interfacial behavior is critical.

Commercial specifications

• Packaging from drums to intermediate bulk containers