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1-Hydroxynaphthalene-8-sulfonic acid

1-Hydroxynaphthalene-8-sulfonic acid Structure
1-Hydroxynaphthalene-8-sulfonic acid
  • CAS No.117-22-6
  • Chemical Name:1-Hydroxynaphthalene-8-sulfonic acid
  • CBNumber:CB5405682
  • Molecular Formula:C10H8O4S
  • Formula Weight:224.23
  • MOL File:117-22-6.mol
1-Hydroxynaphthalene-8-sulfonic acid Property
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal wordWarning
  • Hazard statements H302-H315-H319-H335
  • Precautionary statements P261-P280-P301+P312-P302+P352-P305+P351+P338

1-Hydroxynaphthalene-8-sulfonic acid Chemical Properties,Usage,Production

  • Chemical Properties 1-Hydroxynaphthalene-8-sulfonic acid [117-22-6]. (8-hydroxynaphthalene-1-sulfonic acid), C10H8O4S, Mr 224.2, crystallizes as the monohydrate with mp 106℃. Sulfonation gives 1-hydroxynaphthalene-4,8-disulfonic acid, and alkali fusion with potassium hydroxide at 230℃ yields 1,8-dihydroxynaphthalene. Coupling with diazo compounds occurs in the 2- position.
  • Uses The naphthosultone is usually satisfactory as an intermediate for further processing; however, for azo dye preparation the free naphthol must be used, for example, in C.I. Acid Black 54 and C.I. Acid Blue 158.
  • Production Methods 1-Aminonaphthalene-8-sulfonic acid is diazotized over 16 h at 50℃ and then heated to 80 ℃. After cooling, the precipitated naphthosultone is filtered off and washed. The sultone is heated with dilute sodium hydroxide at 100℃, which causes ring opening; the product is isolated after salting out.
    1-Hydroxynaphthalene-8-sulfonic acid synthesis
1-Hydroxynaphthalene-8-sulfonic acid Preparation Products And Raw materials
Raw materials
Preparation Products
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1-Hydroxynaphthalene-8-sulfonic acid Spectrum
117-22-6, 1-Hydroxynaphthalene-8-sulfonic acidRelated Search:
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