Registration Dossier
Registration Dossier
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EC number: 947-726-2 | CAS number: -
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
- Endpoint:
- toxicity to soil microorganisms
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- REPORTING FORMAT FOR THE ANALOGUE APPROACH
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
This read-across is based on the hypothesis that source and target substances have similar toxicological properties because
• they are manufactured from similar or identical precursors under similar conditions
• they share structural similarities with common functional groups: quaternary ammonium and saturated or unsaturated alkyl chains with comparable length (corresponding to scenario 2 of the read-across assessment framework)
The read-across hypothesis is based on structural similarity of target and source substances. Based on available experimental data, including key physicochemical properties and data from acute toxicity, irritation, sensitization (human) and genotoxicity studies, the read-across strategy is supported by a quite similar toxicological profile of all substances.
Therefore, read-across from the existing ecotoxicity, environmental fate and toxicity studies conducted with the source substances is considered as an appropriate adaptation to the standard information requirements of the REACH Regulation for the target substance, in accordance with the provisions of Annex XI, 1.5 of the REACH Regulation.
A justification for read-across is attached to IUCLID section 13.
2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
See justification for read-across attached to IUCLID section 13.
3. ANALOGUE APPROACH JUSTIFICATION
See justification for read-across attached to IUCLID section 13.
4. DATA MATRIX
See justification for read-across attached to IUCLID section 13. - Reason / purpose for cross-reference:
- read-across: supporting information
- Reason / purpose for cross-reference:
- read-across source
- Test organisms (inoculum):
- soil
- Duration:
- 14 wk
- Dose descriptor:
- NOEC
- Effect conc.:
- 400 mg/kg soil dw
- Basis for effect:
- respiration rate
- Duration:
- 28 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 365 mg/kg soil dw
- Basis for effect:
- respiration rate
Reference
Description of key information
Key value for chemical safety assessment
- Long-term EC10 or NOEC for soil microorganisms:
- 400 mg/kg soil dw
Additional information
No experimental data are available for the target substance Di-C12-18 alkyldimethyl ammonium chloride. However, two toxicity studies with soil microorganisms are available for the closely related source substance DHTDMAC. A justification for read-across is attached to IUCLID section 13.
No effects on respiration rate or carbon dioxide production were observed at concentrations of 365 and 400 mg/ kg soil dw, respectively.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
