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Naphthol AS

Basic information Safety Supplier Related

Naphthol AS Basic information

Product Name:
Naphthol AS
Synonyms:
  • NAPTHOL AS
  • NAPHTHOL AS(TM)
  • NAPHTHOL AS
  • TEREPHTHALBIS(O-HYDROXYANILIDE)
  • Dycosthol AS
  • Kako Grounder AS
  • Naphtanilide RC
  • Orange Base GC
CAS:
92-77-3
MF:
C17H13NO2
MW:
263.29
EINECS:
202-188-1
Product Categories:
  • Fluorescent
  • Naphthalene
  • Organics
  • Intermediates of Dyes and Pigments
Mol File:
92-77-3.mol
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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
pka
9.70(at 25℃)
form 
Powder
Colour Index 
37505
color 
Beige
PH Range
Non& uorescence (8.2) to yellow/green & uorescence (10.3)
λmax
394nm
Major Application
Sensors, recording materials, photovoltaic cells, copying materials, photoreceptors, lithographic printing plates, inks, toner, paints, textiles, detecting cancer
CAS DataBase Reference
92-77-3(CAS DataBase Reference)
EPA Substance Registry System
3-Hydroxy-2-naphthanilide (92-77-3)
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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

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Naphthol AS Usage And Synthesis

Description

Naphtol 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 Properties

beige powder

Hazard

Low toxicity by ingestion.

Contact allergens

Naphthol 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 Methods

Crystallise it from xylene or AcOH which forms plates m 243-244o [Schnopper et al. Anal Chem 31 1542 1959]. [Beilstein 12 H 505.]

Naphthol ASSupplier

J & K SCIENTIFIC LTD.
Tel
010-82848833- ;010-82848833-
Email
jkinfo@jkchemical.com;market6@jkchemical.com
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
21-61259100-
Email
sh@meryer.com
3B Pharmachem (Wuhan) International Co.,Ltd.
Tel
821-50328103-801
Email
3bsc@sina.com
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386 / 800-988-0390
Email
Sales-CN@TCIchemicals.com
Energy Chemical
Tel
021-58432009
Email
sales8178@energy-chemical.com