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| OEM | OEM Services Provided |
| Feature | Good stability,Easy to Use |
| Classification | Dyes and Pigments |
| Advantage | Professional, Fast Delivery, Customizable | Samples | Apply for free，Contact us now. |
| 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 |
| 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 |
| form | Powder |
| Colour Index | 37505 |
| 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) |
| 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 |
| Provider | Language |
|---|---|
| Naphthol AS | English |
| SigmaAldrich | English |
| ACROS | English |
| Description | Naphtol AS is a coupling agent in cotton dying.Occupational dermatitis was reported in a womaninvolved in needlework, probably sensitized fromoccupational contact with clothes. |
| beige powder | |
| Uses | Naphtol AS was used as off-the-shelf color-based anion sensors in organic solvents. |
| aniline and 3-Hydroxy-2-naphthoic acid?condensation. | |
| Hazard | Low toxicity by ingestion. |
| Naphthol AS is a coupling agent in cotton dyeing, inducingoccupational dermatitis or contact allergy in consumersin contact with cotton-dyed clothing. It has beenindirectly reported as a cause of occupational allergy dueto its coupling with Diazo Component 51, or as a crosssensitizeror sensitizer associated with Pigment Red 23in red parts of tattoos. Pigmented contact dermatitis isusual 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.] |
| 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. |
| Raw materials | Sodium carbonate-->Phosphorus trichloride-->Aniline-->Chlorobenzene-->3-Hydroxy-2-naphthoic acid-->3-Hydroxy-2-naphthoic acid-->Aniline-->1-Naphthylamine |
| Preparation Products | Pigment Red 21-->Master-batches-->Pigment Fast Scarlet G-->Bronze Red-->Coating Brilliant Red-->Pigment Permanent Red RB-->Pigment Red 22-->Scarlet 808-->4,4'-bis[[2-hydroxy-3-[(phenylamino)carbonyl]-1-naphthyl]azo][1,1'-biphenyl]-2,2'-disulphonic disodium acid |
Declaration: The products displayed on this website are intended exclusively for industrial applications or scientific research. They are not intended for medical, pharmaceutical, or food use. In accordance with applicable laws and regulations, purchasing organizations must hold valid qualifications and approvals.
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