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3-Hydroxy-2-naphthoic acid

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3-Hydroxy-2-naphthoic acid Basic information
3-Hydroxy-2-naphthoic acid Chemical Properties
  • Melting point:218-221 °C(lit.)
  • Boiling point:283.17°C (rough estimate)
  • Density 1.43 g/cm3 (23℃)
  • refractive index 1.7160 (estimate)
  • Flash point:>150°C
  • storage temp. Store below +30°C.
  • solubility 0.072g/l practically insoluble
  • pka3.02±0.30(Predicted)
  • form Fine Crystalline Powder
  • color Yellow to beige-brown
  • Water Solubility PRACTICALLY INSOLUBLE
  • λmax395nm(H2O (pH 3.5))(lit.)
  • Merck 14,4835
  • BRN 744100
  • CAS DataBase Reference92-70-6(CAS DataBase Reference)
  • NIST Chemistry Reference2-Naphthalenecarboxylic acid, 3-hydroxy-(92-70-6)
  • EPA Substance Registry System3-Hydroxy-2-naphthoic acid (92-70-6)
Safety Information
MSDS
3-Hydroxy-2-naphthoic acid Usage And Synthesis
  • Chemical Propertiesyellow to beige-brown fine crystalline powder
  • UsesDyes and pigments.
  • Uses2-hydroxy-3-naphthoic acid (BON) is coupled with diazo compounds and their calcium salts are bright red bleed resistance pigments. The somewhat higher cost manganese salt shows better exterior durability than the calcium or barium salts. The BON red pigments are characterized by an extremely high degree of color stability, resistance to acids and alkalies and are nontoxic.
  • HazardIrritant.
  • Purification MethodsCrystallise it from water or acetic acid. The S-benzyisothiuronium salt has m 216-217o (from EtOH). It forms many metal complex salts. [Beilstein 10 H 333, 10 III 1084.]
3-Hydroxy-2-naphthoic acid Preparation Products And Raw materials
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