Difference between revisions of "Cyclododecane"

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== Notes ==
 
== Notes ==
  
There are 2 main uses for cyclododecane: as an intermediate for the production of hexabromo cyclododecane (which is a [[flame retardant]]) a  
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There are 2 main uses for cyclododecane: as an intermediate, e. g. for the production of [[flame retardant|flame retardants]]), cleaning and washing agents and other chemicals. It can also be used as a binding medium for temporarily sealing, consolidation and conservation of weak or friable materials.
  
 
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It is very persistent in the environment. It's not hydrolysed abiotically and also not easily biodegraded. Considering that is highly lipofylic, cyclododecane it considered to be mostly [[adsobtion|adsorbed]] to particles and soils. It is also very volitile causing the dissolved cyclododecane to vaporize rapidly in the atmosphere. The concentrations of a smal pond are halved in less than 4 hours due to evaporation. However, because of the effect of adhesion this takes 48 days. If released to the atmosphere, cyclododecane will abiotically be degraded.
 
 
Cyclododecane  may  be  released  to  the environment in  wastewater  streams,  fugitive  emissions  generated at sites of its industrial production and sites of its use (Hall Howard, 1997). If released to  soil, it is not expected  to leach. If released to water, it may volatilize and partition to sediment.
 
 
 
 
 
 
 
 
 
 
 
If released to the atmosphere, cyclododecane will abiotically be degraded. The rate constant for the
 
vapour-phase reaction of cyclododecane with photochemically produced hydroxyl radicals has been
 
estimated  to be 1,67.10-11 cm3 /molecule-sec at 25°C, wich corresponds  to an atmospheric half-life
 
of about 23hr and a atmospheric concentration of 5.105
 
hydroxyl radicals par cm3
 
(Atkinson, 1987). 
 
Reaction  half-life  with OH-radicals  in  the atmosphere was  estimated  at  22.7  hours  by AopWin
 
v1.91 (5*105 OH cm-3; 24 h day-1
 
). No estimate for reaction with ozone was provided by the model.
 
Alkanes are generally resistant to aqueous environmental hydrolysis (Lyman et al, 1990); therefore,
 
cyclododecane is not expected to hydrolyze in the environment.
 

Revision as of 15:29, 10 August 2009

Definition of cyclododecane:
Cyclododecane is a saturated, alicyclical hydrocarbon. [1]
This is the common definition for cyclododecane, other definitions can be discussed in the article

Notes

There are 2 main uses for cyclododecane: as an intermediate, e. g. for the production of flame retardants), cleaning and washing agents and other chemicals. It can also be used as a binding medium for temporarily sealing, consolidation and conservation of weak or friable materials.

It is very persistent in the environment. It's not hydrolysed abiotically and also not easily biodegraded. Considering that is highly lipofylic, cyclododecane it considered to be mostly adsorbed to particles and soils. It is also very volitile causing the dissolved cyclododecane to vaporize rapidly in the atmosphere. The concentrations of a smal pond are halved in less than 4 hours due to evaporation. However, because of the effect of adhesion this takes 48 days. If released to the atmosphere, cyclododecane will abiotically be degraded.