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4,4'-Biphenol

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4,4'-Biphenol Basic information
4,4'-Biphenol Chemical Properties
  • Melting point:280-282 °C(lit.)
  • Boiling point:280.69°C (rough estimate)
  • Density 1.22
  • refractive index 1.6010 (estimate)
  • storage temp. Sealed in dry,Room Temperature
  • form Powder
  • pka9.74±0.26(Predicted)
  • color Off-white to light beige or light gray
  • Water Solubility sparingly soluble
  • BRN 1908886
  • CAS DataBase Reference92-88-6(CAS DataBase Reference)
  • NIST Chemistry Referencep,p'-Biphenol(92-88-6)
  • EPA Substance Registry System4,4'-Biphenyldiol (92-88-6)
Safety Information
  • Hazard Codes Xn
  • Risk Statements 21-36/37/38-37/38/68-36
  • Safety Statements 26-36-24/25-36/37
  • RIDADR 3077
  • WGK Germany 2
  • RTECS DV4725000
  • TSCA Yes
  • HazardClass 9
  • PackingGroup III
  • HS Code 29061900
  • ToxicityLD50 orl-rat: 9850 mg/kg TXAPA9 28,313,74
MSDS
4,4'-Biphenol Usage And Synthesis
  • Chemical PropertiesPowder
  • UsesIntermediates of Liquid Crystals
  • Uses4,4'-biphenol be used intermediate liquid crystal polymers raw materials. Synthetic polymers, due to its excellent heat resistance, it is used as polyester, urethane modified monomer, polycarbonate, polysulfone, and epoxy resin, for the manufacture of an excellent engineering plastics and composite materials. Antioxidant antioxidants for rubber and plastics. Dye intermediates or petroleum products stabilizer.
  • UsesBiphenol is an intermediate used in the manufacture of thermoplastics such as liquid crystalline polymers (LCP), polyesters, polycarbonates and polysulfones.
  • DefinitionChEBI: A member of the class of hydroxybiphenyls that is biphenyl with hydroxy groups at positions 4 and 4'.
  • Safety ProfilePoison by intraperitoneal route.Moderately toxic by skin contact. Mildly toxic byingestion. Human mutation data reported. When heated todecomposition it emits acrid smoke and irritating fumes.
  • Purification MethodsRecrystallise the biphenol from aqueous EtOH preferably under N2 to avoid oxidation to the extended qiunone. It is characterized as the dimethyl derivative (4,4’-dimethoxybiphenyl) from which it is prepared by demethylation. The dimethoxy derivative has m 176.5-177o (from AcOH, EtOH, hexane or *C6H6) and sublimes in vacuo. [Williamson & Rodebush J Am Chem Soc 63 3019 1941, Beilstein 6 I 485, 6 II 962, 6 III 6389, 6 IV 6651.]
4,4'-Biphenol Preparation Products And Raw materials
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