Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
biodegradation in soil
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2001
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2001
Report date:
2001

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: (U.S.) Environmental Protection Agency, Pesticide Assessment Guidelines, Subdivision N Chemistry: Environmental Fate § 162-1 Aerobic soil metabolism studies, October 1982
Qualifier:
according to guideline
Guideline:
other: BBA Guideline for the Official Testing of Plant Protectants, Part IV, 4-1, 1986
Qualifier:
according to guideline
Guideline:
other: Commission Directive 95/36/EC amending Council Directive 91/414/EEC (Annexes I and II, Fate and Behaviour in the Environment), July 14, 1995
Qualifier:
according to guideline
Guideline:
other: SET AC Procedures for Assessing the Environmental Fate and Ecotoxicity of Pesticides, March 1995
GLP compliance:
yes
Test type:
laboratory

Test material

Constituent 1
Chemical structure
Reference substance name:
Naphthalenesulfonic acids, branched and linear Bu derivs., sodium salts
EC Number:
293-346-9
EC Name:
Naphthalenesulfonic acids, branched and linear Bu derivs., sodium salts
Cas Number:
91078-64-7
Molecular formula:
Not applicable (a generic molecular formula can not be provided for this specific UVCB substance)
IUPAC Name:
Naphthalenesulfonic acids, branched and linear Bu derivs., sodium salts
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Study design

Oxygen conditions:
aerobic
Soil classification:
other: Monheim 3
Details on soil characteristics:
The study was performed with the soil "Monheim 3" a sandy loam from the "NRW", Germany. It is an "agriculturally used soil" which was used in a great
number of studies already and this soil meets the requirements of the registration authorities
Textural class [USDA]: sandy loam
Duration of test (contact time)
Duration:
> 0.1 - < 180 d
Initial test substance concentration
Initial conc.:
140 mg/kg soil d.w.
Experimental conditions
Temp.:
20+/-2°C
Humidity:
40% of the maximum water holding capacity

Results and discussion

Half-life / dissipation time of parent compound
DT50:
137 d
Type:
(pseudo-)first order (= half-life)
Remarks on result:
other: r2 = 0.81
Transformation products:
not specified

Applicant's summary and conclusion

Conclusions:
The test item was degraded in soil. The DT-50 value (half-life) in the soil "Monheim 3" was calculated to be 137 days following first order reaction kinetics.