Naphthol AS

Product Name: Naphthol AS
CAS No.: 92-77-3
Chemical Name: Naphthol AS
Synonyms: NAPTHOL AS;2-Hydroxy-3-naphthanilide;3-hy;azotola;CI 37505;celcotrf;diatholas;naftolomm;naphtolas;Azoic CC2
CBNumber: CB0697833
Molecular Formula: C17H13NO2
Formula Weight: 263.29
MOL File: 92-77-3.mol

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Naphthol AS Property

Melting point:: 246-248 °C(lit.)
Boiling point:: 406.53°C (rough estimate)
Density: 1.1138 (rough estimate)
refractive index: 1.4500 (estimate)
storage temp.: Refrigerator
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
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

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
F: 10-21
HazardClass: 9
PackingGroup: III
HS Code: 29242990

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H317May cause an allergic skin reaction

H319Causes serious eye irritation

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P272Contaminated work clothing should not be allowed out of the workplace.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

TCI Chemical

Product number: H0313
Product name: 3-Hydroxy-2-naphthanilide
Purity: >97.0%(HPLC)(T)
Packaging: 25g
Price: $24
Updated: 2024/03/01

TCI Chemical

Product number: H0313
Product name: 3-Hydroxy-2-naphthanilide
Purity: >97.0%(HPLC)(T)
Packaging: 500g
Price: $85
Updated: 2024/03/01

TRC

Product number: N497060
Product name: NaphtolAS
Packaging: 50g
Price: $140
Updated: 2021/12/16

Usbiological

Product number: 460573
Product name: Naphtol AS
Packaging: 5g
Price: $319
Updated: 2021/12/16

Biosynth Carbosynth

Product number: FA41329
Product name: C.I.Azoic Coupling Component 2
Packaging: 1kg
Price: $320
Updated: 2021/12/16

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Naphthol AS Chemical Properties,Usage,Production

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

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.

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.]

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.

Naphthol AS Preparation Products And Raw materials

Raw materials

3-Hydroxy-2-naphthoic acid Phosphorus trichloride Aniline Chlorobenzene Sodium carbonate

Preparation Products

Pigment Fast Scarlet G Master-batches Pigment Red 21 Pigment Permanent Red RB Coating Brilliant Red Bronze Red

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Naphthol AS Suppliers

Americas 1 Belgium 1 Canada 1 China 195 Czech Republic 1 Europe 2 Germany 2 India 42 Japan 4 Slovakia 1 Switzerland 2 The Netherlands 1 United Kingdom 7 United States 32 Global 292

Alfa Chemistry

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View Lastest Price from Naphthol AS manufacturers

Hebei Weibang Biotechnology Co., Ltd

Product: Naphthol AS 92-77-3
Price: US $100.00/KG
Min. Order: 1KG
Purity: 99%min
Supply Ability: 200TON
Release date: 2024-10-31

Hebei Kingfiner Technology Development Co.Ltd

Product: Naphthol AS 92-77-3
Price: US $0.00-0.00/kg
Min. Order: 1kg
Purity: 0.99
Supply Ability: 50000kg
Release date: 2024-05-29

Hebei Mujin Biotechnology Co.,Ltd

Product: Naphthol 92-77-3
Price: US $0.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 50000KG/month
Release date: 2023-07-04

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3-HYDROXY-2-NAPHTHANILIDINE

2-naphthanilide, 3-hydroxy-

2-hydroxy-3-(phenylcarbamoyl)naphthalene

2-hydroxy-3-naphthalenecarboxanilide