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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
  • Colour Index 37505
  • form Powder
  • pka9.70(at 25℃)
  • 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
Naphthol AS Usage And Synthesis
  • DescriptionNaphtol AS is a coupling agent in cotton dying. Occupational dermatitis was reported in a woman involved in needlework, probably sensitized from occupational contact with clothes.
  • Chemical Propertiesbeige powder
  • UsesNaphtol AS was used as off-the-shelf color-based anion sensors in organic solvents.
  • Preparationaniline and 3-Hydroxy-2-naphthoic acid?condensation.
  • 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.]
  • Properties and Applicationsrice or small red powder, melting point of 243 ~ 244 ℃, more sensitive to the air. In sodium hydroxide solution for yellow in liquid, insoluble in water and sodium carbonate solution, slightly soluble in ethanol, soluble in hot the difficulties. This product is widely used in the cotton fabric dyeing and printing. Dyeing cotton, cotton affinity is low, medium coupled ability. Can also be used for cotton yarn, polyester/cotton, PVA, viscose, silk and vinegar fiber dyeing, also can undertake direct printing, and reactive dye printing and cotton fabrics with the dye printing, discharge printing, the reactive dyes color printing and dyeing, and used to make quick pigment, fast amine element, element and organic pigment fast sulfonylurea medications.
Naphthol AS Preparation Products And Raw materials
Naphthol AS(92-77-3)Related Product Information
Naphthol ASSupplierMore
  • Company Name:J & K SCIENTIFIC LTD.
  • Tel:400-666-7788 010-82848833-
  • Company Name:Meryer (Shanghai) Chemical Technology Co., Ltd.
  • Tel:400-660-8290 21-61259100-
  • Company Name:3B Pharmachem (Wuhan) International Co.,Ltd.
  • Tel:18930552037 821-50328103-801
  • Company Name:TCI (Shanghai) Development Co., Ltd.
  • Tel:021-67121386 / 800-988-0390
  • Company Name:Energy Chemical
  • Tel:400-005-6266 021-58432009-