Product description

5-Bromo-1-pentene 95 CAS 1119-51-3 is a colorless, transparent liquid. Its molecular structure contains both double bonds and bromine atoms, giving it properties similar to both alkenes and haloalkanes. It is a starting material for the synthesis of DL-bromotoxin and benzophenone-containing fatty acids, and is a fundamental chemical and pharmaceutical intermediate with wide applications in pharmaceuticals, pesticides, and materials chemistry.
Chemical Properties and Reaction Characteristics
Double Bond Reactions: Can undergo addition reactions (such as hydrogenation, halogenation, hydrogen halide addition, etc.), oxidation reactions, and other typical alkene reactions.
Bromine Atom Reactions: As a haloalkane, it can undergo nucleophilic substitution reactions (such as reactions with sodium alkoxides, sodium cyanide, etc.), elimination reactions, Grignard reactions, etc.
Bifunctional Group Concerted Reactions: Can be used to construct complex molecular structures, such as synthesizing cyclic compounds through ring-closing reactions.
Stability: Relatively stable at room temperature, but sensitive to light and heat; polymerization or decomposition may occur during long-term storage.
Main Uses
Organic Synthesis Intermediates: Used to synthesize various organic compounds, such as complex molecules like DL-histrionicotoxin and phenyl ketone fatty acids.
Pharmaceuticals and Fine Chemicals: Used as a key raw material in the synthesis of certain pharmaceutical intermediates, pesticide intermediates, and fine chemicals.
Materials Science: Used in the preparation of specialized polymer materials and electronic materials.
Laboratory Research: Used as a commonly used reagent in organic synthesis methodology research and new compound development.

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COA
| Tests | Specifications | Results |
| Appearance | Colorless transparent liquid | Conforms |
| Odor | No special odor | Conforms |
| Purity | ≥99.0% | 99.54% |
| Chrominance(APHA) | <20.0 | 5 |
| IOR | 1.449-1.453 | 1.449 |
| Density (25℃) | 0.94-0.97 | 0.925 |
| PH (25°℃) | 6.0-8.0 | 6.4 |
| Conclusion | Conform with enterprise specification | |
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Density: 1.2±0.1 g/cm³
Boiling point: 126.2±9.0 °C at 760 mmHg
Molecular formula: C₅H₉Br
Molecular weight: 149.029
Flash point: 31.0±6.7 °C
Exact mass: 147.988754
LogP: 2.85
Synthesis Method of 5-Bromo-1-pentene 95 CAS 1119-51-3
A chemical synthesis method for 5-Bromo-1-pentene, characterized by using 1,5-dibromopentane as the starting material, N,N-dimethylformamide as the solvent, and hexamethylphosphoric triamine as the catalyst. The three are mixed and heated to react, followed by atmospheric distillation to obtain crude 5-Bromo-1-pentene. The crude product is washed twice with brine and then purified by distillation to obtain high-purity 5-Bromo-1-pentene. The molar ratio of 1,5-dibromopentane to N,N-dimethylformamide is 1:1–5; the molar ratio of 1,5-dibromopentane to hexamethylphosphoric triamine is 1:0.04–0.08; and the reaction temperature range is 100℃–160℃.
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FAQ
01. What are the main applications of 5-Bromo-1-pentene 95 CAS 1119-51-3?
As a high-end organic synthesis intermediate, it is used in fine chemicals, functional materials, organic molecular framework construction, and laboratory synthetic methodology development. It is a key building block for carbon chain extension and cyclization reactions.
02. How do 5-Bromo-1-pentene 95 CAS 1119-51-3 shelf life and storage conditions affect shelf life?
Under sealed refrigerated (0-10℃) and light-protected storage conditions, the shelf life is 6-12 months. If stored open at room temperature/under light, the shelf life will be significantly shortened, and purity and color darkening are likely to occur.
03. Where can I buy 5-Bromo-1-pentene 95 CAS 1119-51-3?
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