92-77-3
Naphthol AS
CAS: 92-77-3
Molecular Formula: C17H13NO2
92-77-3 - Names and Identifiers
| Name | Naphthol AS |
| Synonyms | Azoic CC2 C.I. 37505 Naphthol AS 2-Hydroxy-3-Naphthanilide C.I. Azoic Coupling Component 2 3-Hydroxy-2-naphthoic aicd anilide C.I. Azoic Coupling Component No. 4 3-hydroxy-N-phenylnaphthalene-2-carboxamide 2-Naphthalenecarboxamide, 3-hydroxy-N-phenyl- |
| CAS | 92-77-3 |
| EINECS | 202-188-1 |
| InChI | InChI=1/C17H13NO2/c19-16-11-13-7-5-4-6-12(13)10-15(16)17(20)18-14-8-2-1-3-9-14/h1-11,19H,(H,18,20) |
92-77-3 - Physico-chemical Properties
| Molecular Formula | C17H13NO2 |
| Molar Mass | 263.29 |
| Density | 1.1138 (rough estimate) |
| Melting Point | 243-250℃ |
| Boling Point | 406.53°C (rough estimate) |
| Appearance | Morphology Powder, color index 37505, color Beige |
| pKa | 9.70(at 25℃) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.4500 (estimate) |
| MDL | MFCD00004096 |
| Physical and Chemical Properties | Light yellow crystals. |
| Use | Mainly used for the production of organic pigments and for cotton fiber, viscose fiber and part of the synthetic fiber dyeing, printing |
92-77-3 - Risk and Safety
| Hazard Symbols | Xi - Irritant N - Dangerous for the environment  |
| Risk Codes | R43 - May cause sensitization by skin contact R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3077 |
| WGK Germany | 1 |
| RTECS | QJ1897400 |
| FLUKA BRAND F CODES | 10-21 |
| HS Code | 29242990 |
| Hazard Class | 9 |
| Packing Group | III |
92-77-3 - Upstream Downstream Industry
92-77-3 - Nature
| solubility | Solubility Insoluble in water; sparingly soluble in ethanol |
| pH range of acid-base indicator discoloration | Non& uorescence (8.2) to yellow/green & uorescence (10.3) |
| maximum wavelength (& lambda;max) | 394nm |
| main applications | Sensors, recording materials, photovoltaic cells, copying materials, photoreceptors, lithographic printing plates, inks, toner, paints, textiles, detecting cancer |
| EPA chemical information | 3-Hydroxy-2-naphthanilide (92-77-3) |
Last Update：2024-04-09 20:49:11
92-77-3 - Uses and synthesis methods
chemical properties
pale yellow crystals. Soluble in hot nitrobenzene, slightly soluble in ethanol, insoluble in water and soda ash solution. The solution dissolved in caustic soda is yellow.
use
1. Mainly used for the production of organic pigments and for the dyeing and printing of cotton fibers, viscose fibers and some synthetic fibers
P> 2. tryptophenol AS is mainly used as a primer for cotton dyeing, as well as a primer for dyeing vinylon, viscose fiber, silk, diacetate fiber and cotton printing. It is often dyed with red base G; dyed with purple sauce with date red base GBC; dyed with orange base GC with yellow light orange; dyed with blue salt VB with blue, etc., is one of the most important chromophenols. Chromophenol AS is also used to make fast pigments, fast amines, fast sulfonates and organic pigments.3. It is widely used as a primer for dyeing and printing cotton fiber fabrics. For example, it is yellow with yellow base GC, orange with orange base GC, red with big red base RC or red base KB, national flag red with big red base G, blue with blue base VB or blue base BB, sauce red with red base RC, and jujube red with date red base GBC. It can also be used to make fast pigment dyes and organic pigments.
production method
1. Condensation of 2,3 acids and aniline in the presence of phosphorus trichloride and chlorobenzene, and then distill chlorobenzene. Raw material consumption (kg/t)2,3 acids (100%) 780 aniline (99%) 400 phosphorus trichloride (100%) 235 chlorobenzene (98%) 220 soda ash (98%) 210
2. Using 2-hydroxy-3-naphthoic acid (2, 3-acid) and aniline as raw materials, using chlorobenzene (or toluene) as solvent, in the presence of phosphorus trichloride, 2,3-Acid and aniline are condensed, neutralized, distilled, filtered, and dried to obtain the finished product.
Last Update：2024-04-09 21:01:54
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View History
Raw Materials for 92-77-3
Downstream Products for 92-77-3
Bronze Red
Pigment Permanent Red RB
Scarlet 808
4,4'-bis[[2-hydroxy-3-[(phenylamino)carbonyl]-1-naphthyl]azo][1,1'-biphenyl]-2,2'-disulphonic disodium acid
Pigment Permanent Red RB
Scarlet 808
4,4'-bis[[2-hydroxy-3-[(phenylamino)carbonyl]-1-naphthyl]azo][1,1'-biphenyl]-2,2'-disulphonic disodium acid