Agent Name

Phenol, 4-nonyl-, branched

CAS Number




Major Category

Other Classes


Branched p-nonylphenol; C9 branched alkyl phenol; p-Nonylphenol, branched; Nonylphenol, 4-branched; [ChemIDplus] 4-Nonylphenol, branched; NP; [NTP] Nonyl Phenol (Branched); p-Nonylphenol 95; p-Nonylphenol 98; [IUCLID] 4-Nonylphenol (branched); [ToxPlanet: EC: SCOEL] UN3145




Commercial nonylphenol: Clear to pale yellow viscous liquid with a mild phenolic odor; [ToxPlanet: EC: SCOEL] Liquid; [Sigma-Aldrich MSDS]


Used mainly to make alkyl phenol ethoxylate surfactants; [IUCLID] Primarily used to make nonylphenol ethoxylates and in the polymers industry (production of resins, plastics, and stabilizers); Also used to make phenolic oximes, in the metal extraction industry, and in specialty paints; [ToxPlanet: Official Journal of the European Communities - Commission Recommendation] Commercial nonylphenol is also used to make tris(4-nonylphenyl) phosphite and as a catalyst for curing epoxy resins; [ToxPlanet: EC: SCOEL]


Male and female reproductive toxicity observed in 3-generation study of rats at 650 ppm and greater in the diet (decreased epididymal sperm density and testicular spermatid head counts in males and increased estrous cycle length and decreased ovarian weights in females); Adverse effects to the kidney also observed; [NTP] The primary component of commercial nonylphenol; Causes severe irritation or burns to skin and eyes in experimental animals; Does not possess significant potential for skin sensitization; Effects to kidney and liver observed in repeated-dose oral studies of rats; Evidence of reproductive toxicity; [ToxPlanet: EC: SCOEL] Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract; Harmful by ingestion; Suspected reproductive toxicant; [Sigma-Aldrich MSDS] See "Phenol."

Exposure Assessment
Vapor Pressure

9.42E-5 mm Hg

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Alkyl phenols, liquid, n.o.s. (including C2-C12 homologues)."

Adverse Effects

Skin Burns

Links to Other NLM Databases
Toxicity Information


Chemical Information

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Related Information in HazMap

Industrial Processes with risk of exposure: