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Sanhe Biochemical
1,5-Dibromopentane
| Product name | 1,5-Dibromopentane |
| English alias | Pentane, 1,5-dibromo-; Pentamethylene bromide; |
| Structural formula | .png) |
| Molecular formula | C5H10Br2 |
| Molecular weight | 229.94100 |
| Appearance | Clear liquid |
| Melting point | −34 ℃(lit.) |
| Relative density | 1.688 g/mL at 25 ℃(lit.) |
| Boiling point | 110 ℃15 mm Hg(lit.) |
| Water solubility | Practically Insoluble |
| Refractivity | n20/D 1.512(lit.) |
| Content | ≥99.0% |
| Moisture | ≤0.05% |
| Stability | Stable at room temperature in closed containers under normal storage and handling conditions. |
| Flash point | >230 °F |
| Vapor pressure | 0.136mmHg at 25℃ |
| Storage | Under storeroom ventilated at low temperature and stored separately with oxidizing agent |
| Use | organic synthesis intermediates. |
| Production method | In 500ml flask, 250g 48% hydrobromic acid was added in turn. 75g concentrated sulfuric acid; 21.5 g tetrahydropyrrolidene (86.5-87.5 ℃ distillate) was installed with a reflux condenser. The brown mixture was heated and refluxed gently for 3 h. After cooling to room temperature, dibromide was separated from the lower layer. The product was washed once with saturated sodium carbonate solution and water, dried with anhydrous calcium chloride, distilled by vacuum distillation, collected at 104-106 ℃ and 2.53kpa. the yield was 46-47g. The yield is 80-82. |
| UN No. | UN1707 PG II |
| Hazard class | 6.1 |
| HS code | 2903309090 |
| Packing | 250KGS/Closed steel drum |
| CAS # | 111-24-0 |
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