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4-Methoxyphenol Basic information
4-Methoxyphenol Chemical Properties
  • Melting point:56 °C
  • Boiling point:243 °C(lit.)
  • Density 1,55 g/cm3
  • vapor density 4.3 (vs air)
  • vapor pressure <0.01 mm Hg ( 20 °C)
  • refractive index 1.5286 (estimate)
  • Flash point:>230 °F
  • storage temp. Store below +30°C.
  • solubility Soluble in acetone, ethyl acetate, ethanol, ether, benzene and carbon tetrachloride.
  • form Liquid
  • pka10.21(at 25℃)
  • color Clear colorless to pale yellow
  • PH5.1 (30g/l, H2O, 20℃)
  • Odor Threshold0.0027ppm
  • Water Solubility 40 g/L (25 ºC)
  • BRN 507924
  • Stability:Stable. Combustible. Incompatible with halogens, oxidizing agents.
  • CAS DataBase Reference150-76-5(CAS DataBase Reference)
  • NIST Chemistry ReferenceMequinol(150-76-5)
  • EPA Substance Registry Systemp-Methoxyphenol (150-76-5)
Safety Information
4-Methoxyphenol Usage And Synthesis
  • Chemical PropertiesWhite crystals.
  • Chemical Properties4-Methoxyphenol is a colorless to white, waxy solid with an odor of caramel and phenol. A combustible solid.
  • UsesInhibitor for acrylic monomers; stabilizer for chlorinated hydrocarbons and ethyl cellulose; UV inhibitor
  • UsesIntermediates of Liquid Crystals
  • Uses5HT1&2 receptor antagonist.
    Mequinol (4-hydroxyanisole) is a substrate of the enzyme tyrosinase and acts as a competitive inhibitor of melanogenesis.
  • IndicationsMequinol (4-hydroxyanisole) is a substrate of the enzyme tyrosinase and acts as a competitive inhibitor of melanogenesis.
  • Synthesis Reference(s)The Journal of Organic Chemistry, 42, p. 1479, 1977 DOI: 10.1021/jo00428a054
    Synthesis, p. 751, 1983 DOI: 10.1055/s-1983-30501
    Tetrahedron Letters, 34, p. 7667, 1993 DOI: 10.1016/S0040-4039(00)61534-4
  • General DescriptionPink crystals or white waxy solid.
  • Air & Water ReactionsSensitive to moisture. Water soluble.
  • Reactivity Profile4-Methoxyphenol can react with oxidizing materials.
  • HazardEye irritant and skin damage.
  • Health Hazard4-Methoxyphenol is expected to cause liver and renal toxicity with narcosis, but only at high levels of exposure.
  • Fire HazardCombustible
  • Safety ProfilePoison by intraperitoneal route. A skin irritant. When heated to decomposition it emits acrid smoke and fumes. See also ETHERS.
  • ShippingUN3335 Aviation regulated solid, n.o.s., Hazard class: 9; Labels: 9-Miscellaneous hazardous material, Technical Name Required.
  • Purification MethodsCrystallise 4-methoxyphenol from *benzene, pet ether or H2O, and dry it under vacuum over P2O5 at room temperature. Sublime it in vacuo. [Wolfenden et al. J Am Chem Soc 109 463 1987, Beilstein 6 IV 5717.]
4-Methoxyphenol Preparation Products And Raw materials
4-Methoxyphenol(150-76-5)Related Product Information
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