1-Hexene Chemical Properties
- Melting point:
- -140 °C
- Boiling point:
- 60-66 °C(lit.)
- 0.678 g/mL at 25 °C(lit.)
- vapor density
- 3 (vs air)
- vapor pressure
- 155 mm Hg ( 21.1 °C)
- refractive index
- Flash point:
- −19 °F
- storage temp.
- Soluble in alcohol, benzene, chloroform, ether, petroleum (Weast, 1986), and many other hydrocarbons including alkenes amd alkanes.
- >14 (Schwarzenbach et al., 1993)
- Specific Gravity
- Clear colorless
- Mild, pleasant.
- Odor Threshold
- Water Solubility
- 0.005 g/100 mL
- Henry's Law Constant
- (atm?m3/mol): 0.435 at 25 °C (Hine and Mookerjee, 1975)
- Exposure limits
- ACGIH TLV: TWA 30 ppm (adopted).
- Stable. Highly flammable - note low flash point. Incompatible with strong oxidizing agents, strong acids, combustible material.
- CAS DataBase Reference
- 592-41-6(CAS DataBase Reference)
- NIST Chemistry Reference
- EPA Substance Registry System
- 1-Hexene (592-41-6)
1-Hexene Usage And Synthesis
1-Hexene, C6H12, is a colorless liquid, which is highly volatile and flammable. Hexene is a component of refinery gas and coffee aroma.
Clear, colorless, flammable liquid with a characteristic, sweetish odor similar to hexane or 1-pentene. An odor threshold concentration of 140 ppbv was reported by Nagata and Takeuchi (1990).
ChEBI: An alkene that is hexane carrying a double bond at position 1.
A clear colorless liquid with a petroleum like odor. Flash point -9°F. Less dense than water and insoluble in water. Vapors heavier than air. Used as a solvent, paint thinner, and chemical reaction medium.
Air & Water Reactions
Highly flammable. Insoluble in water.
1--HEXENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas.
Irritant. Highly flammable, dangerous fire risk.
Inhalation may cause giddiness or incoordination similar to that from gasoline vapor. Prolonged exposure to high concentrations may induce loss of consciousness or death.
Reactivity with Water No reaction; Reactivity with Common Materials: No reactions; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
California Phase II reformulated gasoline contained 1-hexene at a concentration of 770
mg/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 430 and 18,400 μg/km, respectively (Schauer et al., 2002).
According to Chevron Phillips Company’s (2005) product literature, the maximum concentration present in 99.7% tert-butyl mercaptan is 0.05 wt %.
Biological. Biooxidation of 1-hexene may occur yielding 5-hexen-1-ol, which may oxidize to
give 5-hexenoic acid (Dugan, 1972). Washed cell suspensions of bacteria belonging to the genera
Mycobacterium, Nocardia, Xanthobacter, and Pseudomonas and growing on selected alkenes
metabolized 1-hexene to 1,2-epoxyhexane (Van Ginkel et al., 1987).
Photolytic. The following rate constants were reported for the reaction of 1-hexene and OH radicals in the atmosphere: 1.9 x 10-12 cm3/molecule?sec at 300 K (Hendry and Kenley, 1979); 3.75 x 10-11 cm3/molecule?sec at 295 K (Atkinson and Carter, 1984); 3.18 x 10-11 cm3/molecule?sec (Atkinson, 1990). The following rate constants were reported for the reaction of 1-hexene and ozone in the atmosphere: 1.10 x 10-17 cm3/molecule?sec (Bufalini and Altshuller, 1985); 9.0 x 10-17 cm3/molecule?sec (Cadle and Schadt, 1952); 1.40 x 10-17 cm3/molecule?sec (Cox and Penkett, 1972); 1.08 x 10-17 cm3/molecule?sec at 294 K (Adeniji et al., 1981).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water.
1-Hexene is not expected to hydroxyze in water.
Purify it by stirring over Na/K alloy for at least 6hours, then fractionally distil it from sodium under nitrogen. [Beilstein 1 IV 828.]
1-Hexene Preparation Products And Raw materials
- ethyl 3-(2,2-dichlorovinyl)-2,2-dimethyl-1-cyclopropanecarboxylate
- CHRYSANTHEMYL ALCOHOL
- Ethyl chrysanthemumate
- ELAIDOYL CHLORIDE
- GERANYL CHLORIDE
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