Registration Dossier
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EC number: 275-019-2 | CAS number: 70913-98-3
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
Description of key information
NOEC (56 d) ≥ 1000 mg/kg dw for Eisenia fetida (OECD 222)
Key value for chemical safety assessment
Additional information
Since no studies investigating the toxicity to soil macroorganisms of Fatty acids, tall oil, esters with dipentaerythritol (CAS 70913-98-3) are available for this endpoint, in accordance to Regulation (EC) No. 1907/2006 Annex XI, 1.5 a read across to a structurally related substance Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) was conducted. The target as well as the read-across substance are both characterised by the same fatty acid chain lengths C16, C18 and C18 unsatd., contain the same alcohol component (dipentaerythritol) and are hexa-esters. This read-across is justified in detail in the analogue justification in IUCLID Section 13.
The toxicity of the read-across substance Fatty acids, C16-18 and C18-unsatd., hexaesters with dipentaerythritol (CAS 68604-38-6) to soil macroorganisms was tested in a GLP guideline study according to OECD 222 (Hernádi, 2013). Earthworms of the species Eisenia fetida were exposed to the substance in artificial soil. The mortality and growth of adult organisms was determined after an exposure period of 28 days and the number of hatched juveniles was counted after 56 days. Neither the survival and growth nor the reproduction rate of the earthworms was affected by the substance. Thus a NOEC (56 d) of ≥ 1000 mg/kg dw soil was determined.
Based on this result from a structurally related read-across substance (in accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5) which is characterized by a similar ecotoxicological profile, it can be concluded that Fatty acids, tall oil, esters with dipentaerythritol (CAS 70913-98-3) will not exhibit chronic effects to earthworms up to a concentration of 1000 mg/kg dw soil.
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