Registration Dossier
Registration Dossier
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EC number: 638-747-5 | CAS number: 1228186-17-1
Toxicity to soil microorganisms
Administrative data
- Endpoint:
- toxicity to soil microorganisms
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Environmental aspects ofcationic fabric softeners, Soil respiration inhibition of DHTDMAC
- Author:
- Taeuber et al
- Year:
- 1 986
- Bibliographic source:
- ECETOC Technical Report No. 53, DHTDMAC Aquatic & terrestrial Hazard Assessment
Materials and methods
- Principles of method if other than guideline:
- no details on guideline given
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Quaternary ammonium compounds, bis(hydrogenated tallow alkyl)dimethyl, chlorides
- EC Number:
- 263-090-2
- EC Name:
- Quaternary ammonium compounds, bis(hydrogenated tallow alkyl)dimethyl, chlorides
- Cas Number:
- 61789-80-8
- Molecular formula:
- R2Me2N(+)Cl(-) whereas R = mainly C16, 18-alkyl molecular weight range is based on R=14 (lower limit value) and R=18 (higher limit value)
- IUPAC Name:
- N,N-Dimethyl-N,N-di-n-alkyl(C16-18)-ammoniumchloride
- Details on test material:
- Because of the nature of the test material (UVCB), the purity is 100% by definition. The study was assessed as relevant within the EU RAR on DODMAC (2002); it can therefore be assumed that the test material complies with the boundary composition of the REACH substance.
Constituent 1
Test organisms
- Test organisms (inoculum):
- soil
Study design
- Total exposure duration:
- 28 d
Test conditions
- Details on test conditions:
- Soil respiration was measured with soil samples amended with 12.3 g activated sludge and 365 mg DHTDMAC per kilo standard soil (typical application rate).
Results and discussion
Effect concentrations
- Duration:
- 28 d
- Dose descriptor:
- NOEC
- Effect conc.:
- > 365 mg/kg soil dw
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- respiration rate
- Remarks on result:
- other: no effect on respiration at highest tested concentration (=typical application rate at that time)
Applicant's summary and conclusion
- Conclusions:
- Taeuber et al have tested DHTDAMC in sludge amended standards soil at a concentration of 365 mg/kg dw. After 28d soil respiration was not inhibited.
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