2-BROMONAPHTHALENE
2-Bromonaphthalene
CAS: 580-13-2;180-13-2
Molecular Formula: C10H7Br
2-BROMONAPHTHALENE - Names and Identifiers
| Name | 2-Bromonaphthalene |
| Synonyms | 2-bromo-naphthalen 2-Bromonaphthalene 2-BROMO NAPTHALENE 2-Naphthyl bromide 2-BROMONAPHTHALENE 2-BROMO NAPHTHALCNE 2-Bromo Naphthalene BROMONAPHTHALENE(2-) naphthalene,2-bromo- BETA-NAPHTHYL BROMIDE BETA-BROMONAPHTHALENE Naphthalene, 2-bromo- Alpha-Benzoin Oxime (Cupron) |
| CAS | 580-13-2 180-13-2 |
| EINECS | 209-452-5 |
| InChI | InChI=1/C10H7Br/c11-10-6-5-8-3-1-2-4-9(8)7-10/h1-7H |
| InChIKey | APSMUYYLXZULMS-UHFFFAOYSA-N |
2-BROMONAPHTHALENE - Physico-chemical Properties
| Molecular Formula | C10H7Br |
| Molar Mass | 207.07 |
| Density | 1,605 g/cm3 |
| Melting Point | 52-55 °C (lit.) |
| Boling Point | 281-282 °C (lit.) |
| Flash Point | >230°F |
| Water Solubility | slightly soluble |
| Solubility | Insoluble in water, soluble in ethanol, ether, benzene, chloroform |
| Vapor Presure | 0.00565mmHg at 25°C |
| Appearance | White or yellowish powder |
| Color | Clear light yellow to orange-brown |
| Merck | 14,1426 |
| BRN | 1858110 |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Refractive Index | 1.6382 |
| MDL | MFCD00004051 |
| Physical and Chemical Properties | character colorless crystals. |
| Use | Mainly used as pharmaceutical intermediates |
2-BROMONAPHTHALENE - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R36 - Irritating to the eyes |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | UN1230 - class 3 - PG 2 - Methanol |
| WGK Germany | 3 |
| HS Code | 29039990 |
2-BROMONAPHTHALENE - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| synthesis | 2-bromonaphthalene can be obtained from the sandermel reaction of 2-naphthylamine. The reaction first 2-naphthylamine diazotization, and then cuprous bromide treatment, the product: |
| uses | mainly used as pharmaceutical intermediates organic synthesis and dye intermediates. used in the preparation of dyes can be used in the preparation of dyes; |
| production method | is derived from the reaction of 2-naphthol with bromine: A mixture of 0.55mol of triphenylphosphorus and 125ml of acetonitrile was cooled in an ice bath and 88g of bromine was added dropwise with stirring, the reaction temperature being kept below 40 °c. After adding bromine, the ice bath was removed, 0.5 mol2-naphthol and acetonitrile were added, and the mixture was heated at 60-70 ° C. For more than H, and then acetonitrile was distilled off. The temperature was raised until all solids had melted and was raised to 340 °c with stirring until no more hydrogen bromide was evolved. The reaction was cooled to about 100 °c and poured into a beaker. Cooling to room temperature was continued and of heptane or petroleum ether was added to fine precipitate the solid, which was filtered and washed twice with of pentane. The filtrate and the pentane extract were combined, washed with 20% ml of 70% sodium hydroxide, dried over anhydrous magnesium sulfate, and finally, 72-81g of 2-bromonaphthalene was obtained by distillation, with a yield of 80%. |
Last Update：2024-04-09 15:16:51
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