Registration Dossier
Registration Dossier
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EC number: 266-930-6 | CAS number: 67701-06-8 This substance is identified by SDA Substance Name: C14-C18 and C16-C18 unsaturated alkyl carboxylic acid and SDA Reporting Number: 04-005-00.
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
No effects on sediment organisms expected
Key value for chemical safety assessment
Additional information
Fatty acids are used by sediment organisms as an energy source and for anabolic processes as well. Therefore, fatty acids are generally not considered to be toxic to sediment organisms. If used as an energy source microorganisms degrade the substance to carbon dioxide. In anabolic processes fatty acid carbon is incorporated into the biological matrix of the organism. The suitability as an energy source was demonstrated by the ready biodegradability in OECD 301 tests. Hence, in case of exposure to sediment, the substance is expected to rapidly dissipate either by degradation or by integration into the organisms matrix.
Therefore sediment is not expected to be a compartment of concern and the risk to sediment organisms is negligible.
Further supporting information is available from a GLP-study conducted with the marine sediment dweller Corophium volutator (Hudson, 2006). The amphipods were exposed in a static system over a period of 10 days with different test concentrations. The test resulted in a LC50 > 12374.46 mg/L (nominal) the highest concentration tested. No effects were observed up to the highest test concentration.
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