(E)-1,4-Dibromobut-2-ene
- CAS NO.：821-06-7
- Empirical Formula: C4H6Br2
- Molecular Weight: 213.9
- MDL number: MFCD07783464
- EINECS: 212-472-7
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-24 21:11:45
What is (E)-1,4-Dibromobut-2-ene?
Chemical properties
white to light yellow crystal powde
The Uses of (E)-1,4-Dibromobut-2-ene
(2E)-1,4-Dibromo-2-butene, is used as a reagent in the preparation of diaminoalkenes though copper-mediated diamination reaction.
Synthesis Reference(s)
The Journal of Organic Chemistry, 36, p. 3324, 1971 DOI: 10.1021/jo00821a012
General Description
Crystals or white crystalline solid.
Air & Water Reactions
(E)-1,4-Dibromobut-2-ene may be sensitive to exposure to light and air. Insoluble in water.
Reactivity Profile
(E)-1,4-Dibromobut-2-ene is incompatible with strong oxidizers and strong bases.
Fire Hazard
(E)-1,4-Dibromobut-2-ene is probably combustible.
Purification Methods
Crystallise the dibromide from ligroin and/or distil it in a vacuum. [Beilstein 1 IV 79.]
Properties of (E)-1,4-Dibromobut-2-ene
| Melting point: | 48-51 °C(lit.) |
| Boiling point: | 205 °C(lit.) |
| Density | 1.9393 (estimate) |
| refractive index | 1.5361 (estimate) |
| Flash point: | 113°C |
| storage temp. | 2-8°C |
| solubility | Chloroform (Slightly), Methanol (Slightly) |
| form | Crystals or Crystalline Powder |
| color | colorless to slightly brown |
| Water Solubility | slightly soluble |
| BRN | 1719696 |
| Stability: | Light Sensitive |
| CAS DataBase Reference | 821-06-7(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Butene, 1,4-dibromo-, (E)-(821-06-7) |
| EPA Substance Registry System | 2-Butene, 1,4-dibromo-, (2E)- (821-06-7) |
Safety information for (E)-1,4-Dibromobut-2-ene
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Skull and Crossbones Acute Toxicity GHS06 |
| GHS Hazard Statements |
H301:Acute toxicity,oral H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P260:Do not breathe dust/fume/gas/mist/vapours/spray. P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for (E)-1,4-Dibromobut-2-ene
| InChIKey | RMXLHIUHKIVPAB-OWOJBTEDSA-N |
Abamectin manufacturer
JSK Chemicals
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product: 821-06-7 trans-1,4-Dibromo-2-butene, 98% 99%
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