Alkylphenols (APs) are a family of organic compounds obtained by the alkylation of phenols. They are chemical intermediates that are reacted with other compounds to create derivative products, which are then used to make high-value, high-performance compounds that are used in a variety of applications:

• Nonylphenol (NP)
• Octylphenol (OP)
• Butylphenol (e.g. p-tert.-butylphenol, 2,4- and 2,6-Di-tert.-butylphenols)
• Ortho-substituted alkylphenols (e.g. o-tert.-Butylphenol, o-tert.-Amylphenol, o-sec.-Butylphenol, o-Isopropyl-phenol)
• Dodecylphenol (DDP)
• Amylphenol.

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Alkylphenol ethoxylates (APEs) are produced by the based-catalyzed reaction of an alkylphenol (AP) with ethylene oxide (EO). They are high-value, high-performance non-ionic surfactants that are used primarily industrial applications. Examples are:

• nonylphenol ethoxylates (NPE)
• octylphenol ethoxylates (OPE).