(RS)-1,4-Dibromopentane
1,4-Dibromopentane
CAS: 626-87-9
Molecular Formula: C5H10Br2
(RS)-1,4-Dibromopentane - Names and Identifiers
| Name | 1,4-Dibromopentane |
| Synonyms | NSC 8753 1,4-Dibromopentane 1,4-dibromo-pentan 1,4-DIBROMOPENTANE pentane,1,4-dibromo- Pentane, 1,4-dibromo- (RS)-1,4-Dibromopentane (4R)-1,4-dibromopentane sodium 1-amino-4-(2,4-dimethylanilino)-9,10-dioxo-2-anthracenesulfonate |
| CAS | 626-87-9 |
| EINECS | 210-967-2 |
| InChI | InChI=1/C5H10Br2/c1-5(7)3-2-4-6/h5H,2-4H2,1H3/t5-/m1/s1 |
(RS)-1,4-Dibromopentane - Physico-chemical Properties
| Molecular Formula | C5H10Br2 |
| Molar Mass | 229.94 |
| Density | 1.687 g/mL at 25 °C (lit.) |
| Melting Point | -34.4 °C (lit.) |
| Boling Point | 98-99 °C/25 mmHg (lit.) |
| Flash Point | >110°C |
| Water Solubility | Insoluble in water. |
| Vapor Presure | 0.502mmHg at 25°C |
| Appearance | clear liquid |
| Specific Gravity | 1.687 |
| Color | Colorless to Light orange to Yellow |
| BRN | 605295 |
| Storage Condition | 2-8°C |
| Refractive Index | n20/D 1.508 |
| MDL | MFCD00000153 |
| Physical and Chemical Properties | A liquid with a flavor of alcohol. |
| Use | For Organic synthesis |
(RS)-1,4-Dibromopentane - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R36/38 - Irritating to eyes and skin. R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S37/39 - Wear suitable gloves and eye/face protection |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29033919 |
(RS)-1,4-Dibromopentane - Nature
Open Data Verified Data
A liquid with a flavor of alcohol. The relative density was 1. 6222. Boiling Point (19. 998kPa) 145~147 degrees C (and slightly decomposed). Freezing point -34. 42 °c. Refractive index 5085.
Last Update：2024-01-02 23:10:35
(RS)-1,4-Dibromopentane - Preparation Method
Open Data Verified Data
2 methyl tetrahydrofuran with hydrobromic acid and sulfuric acid ring opening synthesis and get. First put the hydrobromic acid into the reaction pot, cool, slowly add 2-methyl tetrahydrofuran and sulfuric acid with stirring, add it when the temperature does not exceed 40 ℃, and raise the temperature to 60 ℃, the reaction was carried out for 2 hours and then at 80 to 85 ° C. For 4 hours. After cooling, the bromide was fractionated and washed with water until neutral to give 1,4-= bromopentane oil.
Last Update：2022-01-01 10:14:48
(RS)-1,4-Dibromopentane - Use
Open Data Verified Data
It is mainly used as an alkylating agent in organic synthesis and can be used as an intermediate of antimalarial drug primaquine phosphate.
Last Update：2022-01-01 10:14:49
(RS)-1,4-Dibromopentane - Safety
Open Data Verified Data
irritant, can stimulate the skin, eyes, respiratory tract, the skin has to fat and anesthesia. Microsomal mutation test of a Salmonella typhimurium lOumol/dish. Should avoid direct contact during operation, wear protective equipment. The use of iron drum or drum lining plastic drum packaging, according to the general chemical, pharmaceutical raw materials storage and transportation.
Last Update：2022-01-01 10:14:49
(RS)-1,4-Dibromopentane - 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) |
| Use | used in organic synthesis mainly used as alkylating agent in organic synthesis, in the pharmaceutical industry as an intermediate of antimalarial primaquine phosphate. |
| production method | 2-methyltetrahydrofuran was synthesized by bromination of hydrobromic acid and sulfuric acid. The hydrobromic acid was first added to the reaction pot for cooling, and 2-methyltetrahydrofuran and sulfuric acid were successively added slowly under stirring at a temperature not exceeding 40 °c. The temperature was raised to 60 ° C., reacted for 2H, and then reacted at 80-85 ° C. For 4H. After cooling, the bromide was separated and washed with water until neutral to obtain dibromopentane oil. The yield was 92.5%. The content of industrial products is more than 90%. Raw material consumption quota: 2-methyltetrahydrofuran (90%)410kg/t, hydrobromic acid (≥ 48%)2400kg/t. |
Last Update：2024-04-09 02:00:10
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CAS: 626-87-9
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