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Naphthol AS

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Naphthol AS Basic information
Naphthol AS Chemical Properties
  • Melting point:246-248 °C(lit.)
  • Boiling point:406.53°C (rough estimate)
  • Density 1.1138 (rough estimate)
  • refractive index 1.4500 (estimate)
  • solubility Solubility Insoluble in water; sparingly soluble in ethanol
  • pka9.70(at 25℃)
  • form Powder
  • Colour Index 37505
  • color Beige
  • PH RangeNon& uorescence (8.2) to yellow/green & uorescence (10.3)
  • λmax394nm
  • Major ApplicationSensors, recording materials, photovoltaic cells, copying materials, photoreceptors, lithographic printing plates, inks, toner, paints, textiles, detecting cancer
  • CAS DataBase Reference92-77-3(CAS DataBase Reference)
  • EPA Substance Registry System3-Hydroxy-2-naphthanilide (92-77-3)
Safety Information
  • Hazard Codes Xi,N
  • Risk Statements 43-51/53
  • Safety Statements 36/37-61
  • RIDADR UN 3077 9/PG 3
  • WGK Germany 1
  • RTECS QJ1897400
  • 10-21
  • HazardClass 9
  • PackingGroup III
  • HS Code 29242990
MSDS
Naphthol AS Usage And Synthesis
  • Chemical Propertiesbeige powder
  • HazardLow toxicity by ingestion.
  • Contact allergensNaphthol AS is a coupling agent in cotton dyeing, inducing occupational dermatitis or contact allergy in consumers in contact with cotton-dyed clothing. It has been indirectly reported as a cause of occupational allergy due to its coupling with Diazo Component 51, or as a crosssensitizer or sensitizer associated with Pigment Red 23 in red parts of tattoos. Pigmented contact dermatitis is usual in patients with a high phototype.
  • Purification MethodsCrystallise it from xylene or AcOH which forms plates m 243-244o [Schnopper et al. Anal Chem 31 1542 1959]. [Beilstein 12 H 505.]
Naphthol AS Preparation Products And Raw materials
Naphthol AS(92-77-3)Related Product Information
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