Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Physical Properties
- Appearance: Colorless to pale yellow liquid, slight pungent odor, no visible impurities.
- Melting Point: -55 °C (lit.), liquid at room temperature.
- Boiling Point: 198-200 °C (lit.), slight decomposition at boiling point.
- Solubility: Insoluble in water; soluble in ethanol, ether, chloroform and other organic solvents.
- Density: 1.87 g/cm3 (at 25/4℃, lit.).
- Optical Activity: No optical activity; trans configuration (E-configuration).
- Moisture Absorption: Slightly moisture-sensitive, easy to hydrolyze when exposed to moisture.
- Flash Point: 88 °C; refractive index: 1.5450-1.5470 (20 °C).
Chemical Properties
- Chemical Category: Halogenated olefin, dibromoalkene derivative (trans-isomer).
- Stability: Stable under ambient temperature/pressure (sealed); incompatible with strong oxidants, strong bases; moisture-sensitive, easy to hydrolyze.
- Acid-Base Property: Neutral; no obvious acid-base reaction under normal conditions.
- Hydrolysis: Slow hydrolysis in water; hydrolysis accelerates under strong acid/alkali conditions.
- Photostability: Sensitive to light, easy to decompose under strong UV exposure.
- Reactivity: Double bond can undergo addition reactions; bromine atoms can be substituted by nucleophiles; important intermediate for organic synthesis.
Chemical Structure
Structural formula: $$\mathrm{C_4H_6Br_2}$$ (Canonical SMILES: BrCH=CHCH?Br)
（Complete structural diagram available on request）
Applications
- Organic synthesis intermediate: Used in the synthesis of heterocyclic compounds, pharmaceuticals and agrochemicals.
- Pharmaceutical industry: Intermediate for the synthesis of anti-tumor, anti-inflammatory and other drugs.
- Chemical synthesis: Used in the preparation of dienes, polymers and functional materials.
- Research: Reagent for organic reaction mechanism, halogenated compound research.
Storage & Handling
- Storage: Sealed container, cool/dry/dark/ventilated; away from sunlight, heat, moisture, oxidants and bases.
- Temperature: 20–25 °C (long-term); avoid high temperature; shelf life 12 months.
- Packaging: Sealed glass bottle or plastic barrel (100mL/500mL/20kg), moisture-proof.
- Precautions: Avoid inhalation of vapor; wear protective gear; keep away from ignition sources; dispose of waste properly.
Description
(E)-1,4-Dibromobut-2-ene (CAS: 821-06-7) is a halogenated olefin (C?H?Br?, MW 215.90), colorless to pale yellow liquid (purity ≥98.0% GC), slightly moisture-sensitive. It is an important organic synthesis intermediate, widely used in pharmaceuticals, agrochemicals and chemical synthesis. Store sealed in cool dry conditions to avoid hydrolysis and decomposition.
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