Difference between revisions of "C10-13-cloroalkanes"

From Coastal Wiki
Jump to: navigation, search
m
(4 intermediate revisions by the same user not shown)
Line 1: Line 1:
 +
{{tocright}}
 
{{ Definition|title= C<sub>10-13</sub>-chloroalkanes
 
{{ Definition|title= C<sub>10-13</sub>-chloroalkanes
  
|definition=C<sub>10-13</sub>-chloroalkanes are UVCB substances (Substances of Unknown or Variable Composition) with varying chlorine contents (up to around 70% by weight) and carbon chain lengths (between C10 and C13). <ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref> They are yellowish oily liquids, runny or thick, without a distinct melting point, but undergo a process of thickening at temperatures below 35 °C. <ref name="pollu">[http://pollution.unibuc.ro/?substance=28 http://pollution.unibuc.ro/ 19 August 2009]</ref> }}
+
|definition=C<sub>10-13</sub>-chloroalkanes are UVCB substances (Substances of Unknown or Variable Composition) with varying chlorine contents (up to around 70% by weight) and carbon chain lengths (between C10 and C13)<ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>They are yellowish oily liquids, runny or thick, without a distinct melting point, but undergo a process of thickening at temperatures below 35 °C<ref name="pollu">[http://pollution.unibuc.ro/?substance=28 http://pollution.unibuc.ro/ August 19 2009]</ref>}}
  
 
== Notes ==
 
== Notes ==
Line 16: Line 17:
 
|}
 
|}
  
They were mainly used as industrial metal working fluids in processes involving cutting, drilling, machining and stamping metal in engineering and manufacturing. Because of their [[flame retardant|fire retarding]] properties, C<sub>10-13</sub>-chloroalkanes are used as an additive in rubber, especially for conveyor belts. They are also used in paints and other coatings, leathers, textiles and in sealing compounds. Their use in metal working fluids and for fat liquoring of leather has been prohibited in the EU since January 2004.
+
They were mainly used as industrial metal working fluids in processes involving cutting, drilling and stamping metal in engineering and manufacturing. Because of their [[flame retardant|fire retarding]] properties, C<sub>10-13</sub>-chloroalkanes are used as an additive in rubber, especially for conveyor belts. They can also be used in paints and other coatings, leathers, textiles and in sealing compounds. Their use in metal working fluids and for fat liquoring of leather has been prohibited in the EU since January 2004.
  
C<sub>10-13</sub>-chloroalkanes were mainly released to water as a result of fugitive emissions during manufacture and use as metal working fluids. Accidental releases during transport and storage may also result in environmental contamination. They have a low volatility which causes only limited amounts to be evaporated into the atmosphere where they would be degraded rather rapidly. <ref name="pollu">[http://pollution.unibuc.ro/?substance=28 http://pollution.unibuc.ro/ 19 August 2009]</ref> <ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>
+
C<sub>10-13</sub>-chloroalkanes were mainly released to water as a result of fugitive emissions during manufacture and use as metal working fluids. Accidental releases during transport and storage also resulted in environmental contamination. They have a low volatility which causes only limited amounts to be evaporated into the atmosphere where they are degraded rather rapidly<ref name="pollu">[http://pollution.unibuc.ro/?substance=28 http://pollution.unibuc.ro/ August 19 2009]</ref> <ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>.
  
C<sub>10-13</sub>-chloroalkanes have a low water solubility (between 0,15 and 0,47 mg/l) and a strong tendency to [[adsorption|adsorb]] to organic matter and soils. In marine waters they are not considered to be easily degraded, and can be very persistent in the soils with a possible [[half-life]] of over 450 days.
+
C<sub>10-13</sub>-chloroalkanes have a low water solubility (between 0,15 and 0,47 mg/l) and a strong tendency to [[adsorption|adsorb]] to organic matter and soils. In marine waters they are not considered to be easily degraded, and can be very [[persistent]] in the soils with a possible [[half-life]] of over 450 days.
  
The substance has a high [[bioaccumulation]] potential. This is confirmed by experiments with [[pollution and pelagic fishes|fish]] which could accumulate concentrations up to 8000 times higher than those in the surrounding water. Bioaccumulation has also been confirmed in other [[species]] such as molluscs. Therefore C<sub>10-13</sub>-chloroalkanes are considered likely to [[biomagnification|biomagnify]] through [[food chain|food chains]].<ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>
+
The substance has a high [[bioaccumulation]] potential. This is confirmed by experiments with [[pollution and pelagic fishes|fish]] which could accumulate concentrations up to 8000 times those in the surrounding water. Bioaccumulation has also been confirmed in other [[species]] such as molluscs. Therefore C<sub>10-13</sub>-chloroalkanes are considered likely to [[biomagnification|biomagnify]] through [[food chain|food chains]]<ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>.
  
C<sub>10-13</sub>-chloroalkanes are very toxic to zooplankton. Prolonged exposure to concentrations above 16,3 µg/l have been shown to cause mortalities to a water fleas. Fishes are more tolerant and only start dying by prolonged exposure to concentrations above 300 µg/l. Because of the its potential to biomagnify C<sub>10-13</sub>-chloroalkanes could pose threats of secondary poisoning towards fish eating [[pollution and sea birds|sea birds]] and [[pollution and marine mammals|marine mammals]]. Prolonged exposure to doses of 100 mg of C<sub>10-13</sub>-chloroalkanes per kilogram of body weight a day has been shown to affect the livers and kidneys of rats<ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>  
+
C<sub>10-13</sub>-chloroalkanes are very [[toxic]] for zooplankton. Prolonged exposure to concentrations above 16,3 µg/l have been shown to cause mortalities to a water flea species. Prolonged exposure to concentrations above 300 µg/l is toxic for fishes. Because of their potential to biomagnify C<sub>10-13</sub>-chloroalkanes could pose threats of secondary poisoning towards fish eating [[pollution and sea birds|sea birds]] and [[pollution and marine mammals|marine mammals]]. Prolonged daily administration of doses of 100 mg of C<sub>10-13</sub>-chloroalkanes per kilogram of body weight has been shown to damage the livers and kidneys of rats<ref name="echa">[http://echa.europa.eu/doc/candidate_list/svhc_supdoc_alkanes_c10_13_chloro_publication.pdf European chemicals agency 2008 MEMBER STATE COMMITTEE SUPPORT DOCUMENT FOR IDENTIFICATION OF ALKANES, C10-13, CHLORO AS A SUBSTANCE OF VERY HIGH CONCERN]</ref>
 
<P>
 
<P>
 
<BR>
 
<BR>
Line 37: Line 38:
 
==References==
 
==References==
 
<references/>
 
<references/>
 
+
{{author
 +
|AuthorID=19826
 +
|AuthorFullName=Daphnis De Pooter
 +
|AuthorName=Daphnisd}}
 
[[Category:Coastal and marine pollution]]
 
[[Category:Coastal and marine pollution]]

Revision as of 16:31, 19 March 2013

Definition of C10-13-chloroalkanes:
C10-13-chloroalkanes are UVCB substances (Substances of Unknown or Variable Composition) with varying chlorine contents (up to around 70% by weight) and carbon chain lengths (between C10 and C13)[1]. They are yellowish oily liquids, runny or thick, without a distinct melting point, but undergo a process of thickening at temperatures below 35 °C[2].
This is the common definition for C10-13-chloroalkanes, other definitions can be discussed in the article

Notes

C10- and C13-chloroalkane
Alachlor
Formula
C10H18Cl4 and C13H21Cl7

They were mainly used as industrial metal working fluids in processes involving cutting, drilling and stamping metal in engineering and manufacturing. Because of their fire retarding properties, C10-13-chloroalkanes are used as an additive in rubber, especially for conveyor belts. They can also be used in paints and other coatings, leathers, textiles and in sealing compounds. Their use in metal working fluids and for fat liquoring of leather has been prohibited in the EU since January 2004.

C10-13-chloroalkanes were mainly released to water as a result of fugitive emissions during manufacture and use as metal working fluids. Accidental releases during transport and storage also resulted in environmental contamination. They have a low volatility which causes only limited amounts to be evaporated into the atmosphere where they are degraded rather rapidly[2] [1].

C10-13-chloroalkanes have a low water solubility (between 0,15 and 0,47 mg/l) and a strong tendency to adsorb to organic matter and soils. In marine waters they are not considered to be easily degraded, and can be very persistent in the soils with a possible half-life of over 450 days.

The substance has a high bioaccumulation potential. This is confirmed by experiments with fish which could accumulate concentrations up to 8000 times those in the surrounding water. Bioaccumulation has also been confirmed in other species such as molluscs. Therefore C10-13-chloroalkanes are considered likely to biomagnify through food chains[1].

C10-13-chloroalkanes are very toxic for zooplankton. Prolonged exposure to concentrations above 16,3 µg/l have been shown to cause mortalities to a water flea species. Prolonged exposure to concentrations above 300 µg/l is toxic for fishes. Because of their potential to biomagnify C10-13-chloroalkanes could pose threats of secondary poisoning towards fish eating sea birds and marine mammals. Prolonged daily administration of doses of 100 mg of C10-13-chloroalkanes per kilogram of body weight has been shown to damage the livers and kidneys of rats[1] .


Environmental standards and legislation

Included in the water framework list of priority substances


References

The main author of this article is Daphnis De Pooter
Please note that others may also have edited the contents of this article.

Citation: Daphnis De Pooter (2013): C10-13-cloroalkanes. Available from http://www.coastalwiki.org/wiki/C10-13-cloroalkanes [accessed on 28-03-2024]