|
| | 1,4-PENTADIENE Basic information |
| | 1,4-PENTADIENE Chemical Properties |
| 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 | n20/D 1.389(lit.) | | Fp | 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) |
| Hazard Codes | F+,Xn | | Risk Statements | 12-65 | | Safety Statements | 16-23-62 | | RIDADR | UN 3295 3/PG 1 | | WGK Germany | 3 | | HazardClass | 3.1 | | PackingGroup | II | | HS Code | 29012900 |
| | 1,4-PENTADIENE Usage And Synthesis |
| Chemical Properties | colourless liquid | | Uses | 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.] |
| | 1,4-PENTADIENE Preparation Products And Raw materials |
| Raw materials | 1,2,4,5-Tetrabromopentane-->2-METHYL-1,5-HEXADIENE-->2,5-DIMETHYL-1,5-HEXADIENE-->1-PENTEN-4-YNE-->4-trifluoromethylbenzeneboronic acid neopentyl glycol ester-->Allyl chloride-->Allyl bromide | | Preparation Products | 1,3-Cyclopentadiene-->4,5-Dimethyl-2,6-octadiene.-->TRANS-1,3-PENTADIENE-->TRANS-1,3-PENTADIENE-->CIS-1,3-PENTADIENE-->2-Methyl-2-butene-->propene |
|
