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NP-40 is a commercially available detergent with CAS 9016-45-9. The full name of NP-40 is Tergitol-type NP-40, which is nonyl phenoxypolyethoxylethanol.

Care should be taken to avoid confusing NP-40 with Nonidet P-40 (octyl phenoxypolyethoxylethanol). Its HLB value is 17.8 compared to 13.4 for IGEPAL CA-630.

This powerful detergent is often used to break open all membranes within a cell including the nuclear membrane. To break only the cytoplasmic membrane, one should use IGEPAL CA-630 (AKA Nonidet P-40).

It is an ethoxylated nonylphenol for non-ionic surfactant and can act as emulsifier and demulsifier agent.

The applications for NP-40: - Paper & textile processing - Paints & coatings - Agrochemicals

See also[edit]