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
EC number	223-054-9
ECHA InfoCard	100.020.959
PubChem	19460
Wikidata	Q2698110
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	practically insoluble in water (approx. 0.01 g l −1 at 25 ° C); miscible with ethanol and cyclohexane;
Refractive index	1.422 (20 ° C)
safety instructions
H and P phrases	H: 225-304-410
	P: 210-243-273-301 + 310-303 + 361 + 353-403 + 235
Toxicological data	10500 mg kg −1 ( LD 50 , rabbit , transdermal ) ; 14700 mg kg −1 ( LD 50 , rat , oral ) ;
	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).

[GESTIS-1] ↑ ^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) .

[EFSA-2] EFSA: Opinion of the Scientific Committee / Scientific Panel: 1,7-Octadiene , December 11, 2014, accessed April 25, 2015.

[Sigma-3] Data sheet 1,7-Octadiene, 98% from Sigma-Aldrich , accessed on April 25, 2015 ( PDF ).

[4] CYCLOOCTEN (COE). 8-monomers - starting materials for your synthesis. Evonik Resource Efficiency GmbH, accessed on March 6, 2019 .

[Serban_C._Moldoveanu-5] 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).