Registration Dossier
Registration Dossier
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EC number: 200-816-9 | CAS number: 74-86-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Data is not available to demonstrate that acetylene is readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
As acetylene is a gas at standard temperature and pressure conducting a standard ready biodegradability test is technically difficult and, based on exposure estimates, the test may not be relevant. An OECD 301D closed bottle test has been identified (MITI 2001) which reports 0 % biodegradation over 28 days. We have been unable to obtain a copy of the original report in order to assess its reliability.
The use of the QSARs, BioHCwin v 1.01 in EPI Suite 4 2009 (Howard et al 2005) and Biowin v 4.1 in EPI Suite 4 2009 (Howard et al 1992), to predict the biodegradability of acetylene has also been conducted as part of a weight of evidence approach to fulfil this endpoint requirement. The results taken from BioHCwin must be treated with caution as this compound falls outside the applicability domain, though the predictions suggest that acetylene does have the potential to biodegrade.
In summary, reliable data are not available to demonstrate that acetylene is readily biodegradable and, for the purposes of a risk assessment, ready biodegradability will not be assumed.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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