| Identification | More | [Name]
Naphthol AS | [CAS]
92-77-3 | [Synonyms]
2-HYDROXY-3-NAPHTHOIC ACID ANILIDE
2-HYDROXY-3-NAPHTHOYLANILIDE
3-HYDROXY-2-NAPHTHANILIDE
3-HYDROXY-2-NAPHTHOIC ACID ANILIDE
3-Hydroxy-N-phenyl-2-naphthalenecarboxamide
3-HYDROXY-N-PHENYL-2-NAPHTHAMIDE
AZOIC COUPLING COMPONENT 2
azoic coupling component 4
CI 37505
c.i. 37560
CI NO 37505
NAPHTHOL AS
NAPHTHOL AS(TM)
NAPTHOL AS
TEREPHTHALBIS(O-HYDROXYANILIDE)
3-hydroxy-2-naphthanilid
3-hydroxy-n-phenyl-2-naphthalenecarboxamid
acconaphtholas
acnanaphtholc
amanilnaphtholas | [EINECS(EC#)]
202-188-1 | [Molecular Formula]
C17H13NO2 | [MDL Number]
MFCD00004096 | [Molecular Weight]
263.29 | [MOL File]
92-77-3.mol |
| Chemical Properties | Back Directory | [Appearance]
beige powder | [Melting point ]
246-248 °C(lit.)
| [Boiling point ]
406.53°C (rough estimate) | [density ]
1.1138 (rough estimate) | [refractive index ]
1.4500 (estimate) | [solubility ]
Insoluble in water; sparingly soluble in ethanol | [Colour Index ]
37505 | [form ]
Powder | [pka]
9.70(at 25℃) | [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 | [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. | [CAS DataBase Reference]
92-77-3(CAS DataBase Reference) | [EPA Substance Registry System]
92-77-3(EPA Substance) |
| Hazard Information | Back Directory | [Chemical Properties]
beige powder | [Hazard]
Low toxicity by ingestion. | [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. | [Uses]
Naphtol AS was used as off-the-shelf color-based anion sensors in organic solvents. | [Preparation]
aniline and 3-Hydroxy-2-naphthoic acid?condensation. | [Properties and Applications]
rice 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. | [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.] |
| Safety Data | Back Directory | [Hazard Codes ]
Xi,N | [Risk Statements ]
R43:May cause sensitization by skin contact.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S36/37:Wear suitable protective clothing and gloves .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 3077 9/PG 3
| [WGK Germany ]
1
| [RTECS ]
QJ1897400
| [F ]
10-21 | [HazardClass ]
9 | [PackingGroup ]
III | [HS Code ]
29242990 |
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