Registration Dossier
Registration Dossier
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EC number: 410-190-0 | CAS number: 132983-41-6 MCP 968
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
Description of key information
Earthworm toxicity, 1 key study, 14-d NOEL > 1000 mg/kg soil (nominal) for the submission substance (OECD 207 TG)
Earthworm toxicity, read-across, 1 key study, NOEL >1000 mg/kg soil (nominal) for Synesstic 5, structurally related alkylnaphthalene surrogate (OECD 207 TG)
Key value for chemical safety assessment
- Short-term EC50 or LC50 for soil macroorganisms:
- 1 000 mg/kg soil dw
Additional information
The short-term soil macroorganism toxicity testing has been carried out with the submission substance. Results from a 14-day earthworm study (OECD 207 study guidelines) show that submission substance does not cause any toxicity at the highest soil concentrations tested (1000 mg/kg nominal) (Key Lab, 2010). The 14-day LL50 and 14-day NOEL values were greater than 1000 mg/kg soil dw with no mortality or adverse effects observed.
Similar 14-day earthworm toxicity studies with a structurally related alkylated naphthalene material (i.e., Synesstic 5, aka reaction products of 1- hexadecene and naphthalene)(ExxonMobil Biomedical Sci. 2009) also indicate no mortality to earthworms. Synesstic 5 did not cause any mortality to earthworms at the highest tested loading at 1000 mg/kg in soil. The 14-day LL50 and 14-day NOEL were both greater than 1000 mg/kg soil (nominal loadings).
Collectively, these findings indicate that the submission substance and related alkylated naphthalene surrogates are not acutely toxic to earthworms under the conditions of the OECD 207 test.
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