Chemical name:

4-nonylphenol, branched


chloralkali, raw materials and intermediates

Markets and applications:

adhesives, building & construction, concrete & mortar additives, construction adhesives, road construction, CASE, adhesives, coatings, elastomers, sealants, detergents, I&I cleaning, lubricants and functional fluids, industrial lubricants, metallurgical industry, metal cleaning, metalworking, mining & drilling, metal mining, oil&gas extraction, oilfield, paints & coatings, plastics, polymer additives, printing ink, raw materials and intermediates


raw materials & intermediates




PCC Synteza S.A.

CAS No.:



Nonylphenol is a colorless, viscous liquid with a characteristic phenolic odour. It is a mixture of isomers containing mainly p-nonylphenol. Nonylphenol is soluble in aliphatic alcohols, ketones, esters and aliphatic hydrocarbons. Very difficult to dissolve in water.

Physicochemical properties of Nonylphenol:

  • Boiling range: approx. 2900C - 3100C,
  • Density at 200C: approx. 0,95 g/cm3,
  • Flash point: approx.1500C,
  • Auto-ignition temperature: approx.  3700C,
  • Viscosity at 25° C: 1500-1800 mPas,
  • Water solubility: 6 mg / dm3.

Nonylphenol is an intermediate in the manufacturing process.

The process of producing Nonylphenol involves the alkylation of phenol with propylene trimer to a strongly acidic ion exchange resin as a catalyst, followed by isolation of the product in two-stage distillation under vacuum. Propylene trimer and phenol are continuously added to the reaction system. The reaction consists of multiple circulation of the reaction mixture, at a suitable temperature, through the catalyst bed placed in the reactor. The post-reaction mixture is discharged from the reaction system continuously, contacted with the anion exchanger to remove the acidic substances and it is subjected to distillation on a film evaporator operating under vacuum.

During the initial distillation two fractions are obtained. The light fraction (unreacted raw material) returns to the reaction system, while the heavy fraction (crude nonylphenol) is subjected to periodic distillation under vacuum. In the course of periodic distillation, the first running is recycled to the process and nonylphenol is obtained. The distillation residue is collected and distilled under vacuum to extract nonylphenol, which then returns to the process. The final residue is removed from the process and used to form the poly alkylphenol fraction. Non-reactive impurities of the raw material (propylene trimer) accumulating in circulating technological streams, are removed as hydrocarbon fractions by fractional condensation during pre-distillation.

Nonylphenol is a raw material for the production of surfactants, antioxidants and additives for lubricating oils. This compound can be subjected to ethoxylation to produce nonionic surfactants that are used industrially, commercially and in households. The residues can be used for high-performance liquids, powders and cleaning products in households. The most widely used compounds are the ethoxylates with 9 moles of ethylene oxide per 1 mole of nonylphenol. Ethoxylates with the lowest number of moles (4-6 moles of ethylene oxide) are used as emulsifiers for lubricants and lube oils and for surfactants. Ethoxylates with number of ethylene oxide moles higher than 13 are used as polymerization emulsifiers and pesticide adjuvants.

Nonylphenols are the main surfactants in the textile industry, where they are used in operations on fixed parts of the mechanical press and in dyes and fiber cleaning. In the paper industry they are used as wetting agents and are also a component of latex paints. Nonylphenols are also used in plastics and metals processing. Ethoxylated nonylphenol can also be sulfonated or phosphorylated to produce anionic detergents.

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Properties and applications:

  • raw material for the production of surfactants, antioxidants and additives for lubricating oils
  • ethoxylated nonylphenol is used in the production of nonionic surfactants that are used industrially, commercially and in households
  • nonylphenols are used in the processing of plastics and metals
  • used for the production of phosphate antioxidants
  • component of phenolic additives for lubricating oils, binders and ethoxylated nonylphenol formaldehyde resins

Alternative names:

Show alternative names
Nonylphenol; NP; 4-nonylphenol; p-nonylphenol; p-nonyl phenol; para-nonylphenol; para- nonyl phenol; nonilfenol; PNP; Para Nonylphenol; 4-(7-methyloctyl)phenol; Monoalkylpnenol Cp; paranonylofenol; alkyl phenol; alkyl phenols; alkyl derivatives of phenol; AP; APE; (Hide)


nonylphenol industrial surfactans additive for resins additive for mining industry
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