Registration Dossier
Registration Dossier
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EC number: 206-354-4 | CAS number: 330-54-1
Field studies
Administrative data
- Endpoint:
- field studies
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: GLP Guidleine study, however, no information on storage stability was provided in the study report
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 993
- Report date:
- 1993
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: BBA Guideline Teil IV/4-1 (1986)
- GLP compliance:
- yes
- Type of measurement:
- other: dissipation in soil
- Media:
- Soil
Test material
- Reference substance name:
- Diuron
- EC Number:
- 206-354-4
- EC Name:
- Diuron
- Cas Number:
- 330-54-1
- Molecular formula:
- C9H10Cl2N2O
- IUPAC Name:
- 3-(3,4-dichlorophenyl)-1,1-dimethylurea
- Details on test material:
- TS-Freetext:
Duiron Bayer
Purity: 80.20% active ingredient content
batch no. 232071107
Constituent 1
Results and discussion
Any other information on results incl. tables
No parent or metabolite was detected in any of the trial site control samples at the start and end of the study
Both Diuron and the metabolite Desmethyl-diuron remained in the top 0 to 10 cm layer of the soil cores throughout the course of the experimental period. Only few and low concentrations were found in deeper soil layers indicating the immobility of both substances
Dissipation proceeded moderately and continuously with time. The decline of Diuron in the single trials fits well with the calculated degradation curves except for the trial in Massen in which Diuron residues did not follow a continuous decline pattern but produced highly variable results
Half life values were determined following a first order fit to range between 59 and 298 days (n=5), DT90values were extrapolated for 3 locations and ranged from 197 to 265 days (n=3)
Applicant's summary and conclusion
- Executive summary:
In the soil type tested, Diuron showed a slow to moderate dissipation under natural field conditions and is not prone to move down the soil column
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