1,7-octadiene
Structural formula | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
General | ||||||||||||||||
Surname | 1,7-octadiene | |||||||||||||||
other names |
α, ω-octadiene |
|||||||||||||||
Molecular formula | C 8 H 14 | |||||||||||||||
Brief description |
colorless liquid with a characteristic odor |
|||||||||||||||
External identifiers / databases | ||||||||||||||||
|
||||||||||||||||
properties | ||||||||||||||||
Molar mass | 110.20 g mol −1 | |||||||||||||||
Physical state |
liquid |
|||||||||||||||
density |
0.75 g cm −3 |
|||||||||||||||
Melting point |
−70 ° C |
|||||||||||||||
boiling point |
114-121 ° C |
|||||||||||||||
Vapor pressure |
20 mbar (20 ° C) |
|||||||||||||||
solubility |
|
|||||||||||||||
Refractive index |
1.422 (20 ° C) |
|||||||||||||||
safety instructions | ||||||||||||||||
|
||||||||||||||||
Toxicological data | ||||||||||||||||
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
1,7-Octadiene is a chemical compound from the group of unsaturated aliphatic hydrocarbons and alkadienes .
Extraction and presentation
The technical production of 1,7-octadiene takes place through the thermolysis of cyclooctene . 1,7-octadiene is formed during the pyrolysis of cis -decalin .
properties
1,7-Octadiene is a volatile, lipophilic , flammable, colorless liquid with a characteristic odor that is practically insoluble in water. It decomposes at temperatures above 250 ° C.
use
1,7-Octadiene can serve as a crosslinking agent ( comonomer ) for polyolefins ( polyethylene and polypropylene ).
safety instructions
The vapors of 1,7-octadiene form an explosive mixture with air ( flash point approx. 0–5 ° C, ignition temperature 230 ° C). The compound tends to polymerize spontaneously .
Individual evidence
- ↑ a b c d e f g h i j k l m Entry on 1,7-octadiene in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ↑ a b c EFSA: Opinion of the Scientific Committee / Scientific Panel: 1,7-Octadiene , December 11, 2014, accessed April 25, 2015.
- ↑ Data sheet 1,7-Octadiene, 98% from Sigma-Aldrich , accessed on April 25, 2015 ( PDF ).
- ↑ CYCLOOCTEN (COE). 8-monomers - starting materials for your synthesis. Evonik Resource Efficiency GmbH, accessed on March 6, 2019 .
- ^ Serban C. Moldoveanu: Pyrolysis of Organic Molecules: Applications to Health and Environmental Issues . Elsevier, 2009, ISBN 978-0-08-093215-6 , pp. 167 ( limited preview in Google Book search).