Registration Dossier
Registration Dossier
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EC number: 260-300-4 | CAS number: 56634-95-8
Toxicity to soil macroorganisms except arthropods
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to soil macroorganisms except arthropods: long-term
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- Please refer to the Analogue Justification provided in IUCLID section 13
- Reason / purpose for cross-reference:
- read-across source
- Key result
- Duration:
- 56 d
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 10 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr.
- Basis for effect:
- reproduction
- Duration:
- 56 d
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 10 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr.
- Basis for effect:
- growth
Reference
Description of key information
From source key study, the overall long-term NOEC for the soil macroorganisms except arthropods (Eisenia fetida) is ≥10 mg a.i./kg dry weight soil.
From a supporting study, the LC50 for the soil macroorganisms except arthropods (Eisenia fetida) is 29 mg/kg dry weight soil.
Key value for chemical safety assessment
- Short-term EC50 or LC50 for soil macroorganisms:
- 29 mg/kg soil dw
- Long-term EC10, LC10 or NOEC for soil macroorganisms:
- 10 mg/kg soil dw
Additional information
Data on the toxicity of the substance tosoil macroorganisms except arthropods are not available. In accordance with Regulation (EC) No 1907/2006 Annex XI, 1.5. , the assessment is based on the structurally analogue substance (CAS 1689-99-2).Please refer to the attached analogue justification for further details on the read-across approach.
In this key source study (2011), the chronic toxicity of test susbtance to earthworms (Eisenia fetida) was investigated after 56-day exposure according to OECD 222 guideline. Ten earthworms, in each replicate, were exposed to a concentration of 1.0, 1.78, 3.17, 5.64 and 10.0 mg a.s./kg soil dry weight, alongside with a control. The reproduction NOEC was determined to be≥10 mg a.s./kg dry weight soil, the highest concentration tested.
Additionally in a supportive study (1999), the acute toxicity of test susbtance to earthworms (Eisenia fetida) was investigated after 14-day exposure according to OECD 207 guideline. The earthworms were exposed to a concentration of 10, 18, 32, 56, and 100 mg/kg soil dry weight, alongside with a control. The LC50(14-d) was determined to be29 mg/kg dry weight soil.
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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