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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Reference
Endpoint:
toxicity to soil macroorganisms except arthropods: short-term
Type of information:
experimental study
Adequacy of study:
weight of evidence
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Only results available.
Qualifier:
according to guideline
Guideline:
OECD Guideline 207 (Earthworm, Acute Toxicity Tests)
GLP compliance:
not specified
Test organisms (species):
Eisenia fetida
Animal group:
annelids
Total exposure duration:
14 d
pH:
5.6 - 6.0
Details on test conditions:
TEST SYSTEM
- No. of organisms per container: 10
- No. of replicates per treatment group: 4
- No. of replicates per control: 4

EFFECT PARAMETERS MEASURED: mortality.


Nominal and measured concentrations:
Nominal: 5 mg/kg dry weight soil
Key result
Duration:
14 d
Dose descriptor:
LC50
Effect conc.:
> 5 000 mg/kg soil dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality
Details on results:
LC0: 5000 mg/kg dw
No sublethal effects were observed.

Mortality of earthworms after 7 and 14 days

Nominal conc.
(mg/kg of dry weight of soil)
Total no. of earthwomis
(4 replicates with 10 worms each)
Cummulative mortalities pH of soil
(start of test)
N. deads  % mortality after 14 days
Day 7 Day 14
Blank 40 0 0 0 6
5000 40 0 0 0 5.6
Conclusions:
LC50 > 5000 mg/kg dw
Executive summary:

Method

The acute toxicity of the test substance to the earthworm, Eisenia fetida, was investigated performing a 14 day screening test, according to OECD 207. 40 earthworm were testes at both the concentrations of 0 (control) and 5000 mg/kg of dry weight of soil.

Results

No deaths occurred and no sublethal effects were observed.

LC50 > 5000 mg/kg dw

LC0: 5000 mg/kg dw

Description of key information

LC50 (14 d) > 5000 mg/kg soil dw

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
5 000 mg/kg soil dw

Additional information

A study is available to assess the acute toxicity of the substance to terrestrial macroorganisms. The LC50 value in Eisenia foetida according to OECD 207 was greater than 5000 mg/kg dry weight (Solvias AG., 1999). The reliability is low because just the summary is actually available.

Nevertheless the study is supported by the test on the similar substance 3a-MSA, for which also a summary for the same test is available (Solvias AG., 1999). Detailed justification for Read Across can be found in Section 13 of IUCLID.

No concern for soil toxicity is then arisen by the presented acute studies.