1,4-PENTADIENE
Synonym(s):Allylethylene
- CAS NO.：591-93-5
- Empirical Formula: C5H8
- Molecular Weight: 68.12
- MDL number: MFCD00008665
- EINECS: 209-736-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:24:18
What is 1,4-PENTADIENE?
Chemical properties
colourless liquid
The Uses of 1,4-PENTADIENE
1,4-Pentadiene can be used to obtain bioinsecticidal composition.
General Description
A colorless liquid. Less dense than water and insoluble in water. Hence floats on water.
Air & Water Reactions
Highly flammable. Insoluble in water.
Reactivity Profile
1,4-PENTADIENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release gaseous hydrogen. Can undergo exothermic polymerization reactions in the presence of various catalysts (such as acids) or initiators. May undergo autoxidation upon exposure to the air to form explosive peroxides. Violent explosions have occurred at low temperatures in ammonia synthesis gas units. These explosions have been traced to the decomposition of addition products between dienes such as this one and oxides of nitrogen [Bretherick, 1995].
Health Hazard
Vapor may cause dizziness or suffocation. Contact may irritate skin and eyes.
Purification Methods
Distil it from NaBH4. Purify it by preparative gas chromatography or distillation and stabilize it with 0.1% of 2,6-di-tert-butyl-p-cresol. [Reimann et al. J Am Chem Soc 108 5527 1986, Beilstein 1 IV 998.]
Properties of 1,4-PENTADIENE
| Melting point: | -148 °C |
| Boiling point: | 26 °C(lit.) |
| Density | 0.659 g/mL at 25 °C(lit.) |
| vapor pressure | 11.91 psi ( 20 °C) |
| refractive index | n |
| Flash point: | 40 °F |
| storage temp. | 0-6°C |
| solubility | Soluble in acetone, alcohol, benzene, and ether (Weast, 1986) |
| form | Liquid |
| pka | >14 (Schwarzenbach et al., 1993) |
| color | Clear colorless |
| Water Solubility | 558 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966) |
| BRN | 1696934 |
| Henry's Law Constant | 0.120 at 25 °C (Hine and Mookerjee, 1975) |
| Stability: | Stable. Highly flammable. Note low boiling point and low flash point. Incompatible with strong oxidizing agents. |
| CAS DataBase Reference | 591-93-5(CAS DataBase Reference) |
| EPA Substance Registry System | 1,4-Pentadiene (591-93-5) |
Safety information for 1,4-PENTADIENE
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02  Health Hazard GHS08 |
| GHS Hazard Statements |
H224:Flammable liquids H304:Aspiration hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P403+P233:Store in a well-ventilated place. Keep container tightly closed. |
Computed Descriptors for 1,4-PENTADIENE
New Products
Cyclopropane-1,1-dicarboxylic acid Cefuroxime EP Impurity-A N-Nitroso hydroxy Cetrizine EP Impurity-A Noradrenaline EP Impurity D/Noradrenaline Methyl Ether Cetirizine EP Impurity A/Cetirizine CBHP Impurity Lantanoprost rc B Clidinium Bromide Impurity tert-Butyl (2S)-[1-amino-3-(4-iodophenyl)-1-oxopropan-2-yl]carbamate 4-amino-2-fluoro-N- methylbenzamide 5-Chloro-3- Methyl -1,3-2-benzoxazol-2(3H)-one N-(2-chloropyrimidin-4-yl)-N,2,3- trimethyl-2H- indazol 6-amine N-Boc-1,4-butanediamine 4-Bromo-2-fluoro-N-methylbenzamide valeronitrile 3-chlorobenzyl cyanide 3,4 Dimethoxy Benzylcyanide 3,4 Diethoxy Benzylcyanide 2-Chloro Benzylcyanide 3-Hydroxypropionitrile 5-azidovalericacid 6,6'-bis(difluoromethoxy)-2,2'-bis((3,4-dimethoxypyridin-2-yl)methylsulfinyl)-1H,1'H-5,5'-bibenzo[d]imidazole (1-((2'-(2-((1-((2'-(2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methanol (1-((2'-(1-((1-((2'-(2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-1H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methanol (4-Methoxyphenyl) hydrazine HydrochlorideRelated products of tetrahydrofuran
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