4-octylphenol

4-Octylphenol (CAS 1806-26-4), also known as p-octylphenol, is an alkylphenol intermediate used as a monomer, surfactant precursor, and stabilizing agent.

Where is 4-octylphenol used?

• Textile and leather processing: precursor to octylphenol ethoxylates for scouring, dyeing auxiliaries, and emulsification baths
• Lubricants and metalworking: antioxidant component and additive intermediate
• Plastics and polymers: chain-terminating monomer and co-monomer in phenolic resins and polycarbonate-type systems
• Water treatment: starting material for dispersant and emulsifier synthesis
• It is a building block for ethoxylated nonionic surfactants and resin-based formulations.

Good to know: The linear n-octyl form is specified separately from branched variants in many end-use formulations.

Commercial specifications

• Purity commonly 98%+
• Isomeric profile to be confirmed by buyers
• Bulk drums or IBC containers