5959-52-4
3-Amino-2-naphthoic acid
CAS: 5959-52-4
Molecular Formula: C11H9NO2
5959-52-4 - Names and Identifiers
| Name | 3-Amino-2-naphthoic acid |
| Synonyms | NSC 37061 BRN 0744099 3-Amino-2-naphthoic acid 2-Amino-3-naphthoic acid 3-AMINO-2-NAPHTHOIC ACID 3-Aminoisonaphthoic acid 2-Naphthoic acid, 3-amino- 2-Amino-3-carboxynaphthalene 3-aminonaphthalene-2-carboxylate 3-Amino-2-naphthalenecarboxylic acid 3-AMINONAPHTHALENE-2-CARBOXYLIC ACID 2-Naphthalenecarboxylicacid,3-amino- 3-aminonaphthalene-2-carboxylic acid 2-Naphthalenecarboxylic acid, 3-amino- 3-14-00-01341 (Beilstein Handbook Reference) |
| CAS | 5959-52-4 |
| EINECS | 227-726-2 |
| InChI | InChI=1/C11H9NO2/c12-10-6-8-4-2-1-3-7(8)5-9(10)11(13)14/h1-6H,12H2,(H,13,14)/p-1 |
| InChIKey | XFXOLBNQYFRSLQ-UHFFFAOYSA-N |
5959-52-4 - Physico-chemical Properties
| Molecular Formula | C11H9NO2 |
| Molar Mass | 187.19 |
| Density | 1.1963 (rough estimate) |
| Melting Point | 212-215 °C (dec.) (lit.) |
| Boling Point | 321.94°C (rough estimate) |
| Flash Point | 186.6°C |
| Water Solubility | Soluble in alcohol and ether. Insoluble in water. |
| Vapor Presure | 1.3E-06mmHg at 25°C |
| Appearance | Powder |
| Color | Yellow-green to green |
| Merck | 14,452 |
| BRN | 744099 |
| pKa | 2.20±0.30(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Refractive Index | 1.4900 (estimate) |
| MDL | MFCD00004115 |
| Physical and Chemical Properties | Yellow thallus crystals. The melting point was 216-217 °c. Soluble in ethanol and ether, micro-soluble in hot water, the solution with green fluorescence. |
5959-52-4 - Risk and Safety
| Hazard Symbols | Xn - Harmful |
| Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | QL1400000 |
| TSCA | Yes |
| HS Code | 29224999 |
5959-52-4 - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | organic synthesis, dye intermediates. |
| production method | prepared by coheating 3-hydroxy-2-naphthoic acid with ammonia in the presence of a catalyst. 28% ammonia water, zinc chloride and 3-hydroxy-2-naphthoic acid were successively added into the autoclave, stirred, heated for 3H to reach 195 ℃, maintained for 36H, and the pressure was about 2.7MPa. After cooling to room temperature, concentrated hydrochloric acid was added to the reaction mixture and the suspension was boiled for 30min and filtered while hot. The filter cake was mixed with water and hydrochloric acid, boiled for 30min and filtered. The filtrate was cooled twice and then the 3-amino-2-naphthoic acid salt was precipitated and filtered. The filtrate was heated to 85 °c, salt was added, and cooling was continued to yield a second crop of the hydrochloride salt. Then 40% sodium hydroxide solution was added to make the mixture alkaline, and the mixture was heated to 85 ° C., and concentrated hydrochloric acid was added until the Congo red test paper was acidic. After stirring, an appropriate amount of 10% sodium acetate solution was added to make the Congo red test paper not blue. The product is obtained by washing with hot water and pressing to dry. |
| category | toxic substances |
| toxicity grade | poisoning |
| Acute toxicity | oral-mouse LD50: 1600 mg/kg |
| flammability hazard characteristics | flammability; Toxic NOx smoke from combustion |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
Last Update：2024-04-10 22:29:15
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