Registration Dossier

Environmental fate & pathways

Additional information on environmental fate and behaviour

Administrative data

Endpoint:
additional information on environmental fate and behaviour
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 12-MAR-1999 to 21-APR-1999
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The test conditions and the results are sufficiently described for the assessment. The GLP were not stated.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1999
Report Date:
1999

Materials and methods

GLP compliance:
no
Type of study / information:
Stability of dimethylsulfide in freshwater

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): dimethylsulfide
- Substance type: pure active substance
- Physical state: clear liquid
- Storage condition of test material: under ambient conditions

Results and discussion

Any other information on results incl. tables

Analysis of dimethyl sulfide samples in freshwater following 1 hour of shaking were 91.4 +/- 0.751% (CV 0.822%) of the nominal concentration. Following 48 anf 96 hours of shaking, the recoveries were 87.8 +/- 1.04% (CV 1.18%) and 85.6 +/- 0.755% (CV 0.882%) of the nominal concentration, respectively.

Table 1: stability of dimethylsulfide in freshwater at 20 +/- 1 °C

Sample number

Interval (hour)

Dimethylsulfide concentration (mg/L)

Percent recovery

Mean recovery (%)

Standard Deviation (SD)

Coefficient of Variation (CV)

Fortified

Measured

PSA-1hr

PSB-1hr

PSC-1hr

1

1

1

10.2

10.2

10.2

9.32

9.24

9.40

91.4

90.6

92.1

Mean = 91.4

SD = 0.751

CV = 0.822%

PSA-D2

PSB-D2

PSC-D2

48

48

48

10.2

10.2

10.2

8.83

8.98

9.03

86.6

88.1

88.6

Mean = 87.8

SD = 1.04

CV = 1.18%

PSA-D4

PSB-D4

PSC-D4

96

96

96

10.2

10.2

10.2

8.72

8.81

8.66

85.5

86.4

84.9

Mean = 85.6

SD = 0.755

CV = 0.882%

Applicant's summary and conclusion

Conclusions:
The stability of dimethylsulfide in freshwater at 20 +/- 1°C over a 96h period ranged from 91.4 +/- 0.751% (CV 0.822%) to 85.6 +/- 0.755% (CV 0.882%) of the nominal concentration of 10.2 mg/L.
Executive summary:

The stability of dimethylsulfide in freshwater was determined in a solution at 10.2 mg/L (nominal concentration) after 1, 48 and 96 hours.

The stability ranged from 91.4 +/- 0.751% (CV 0.822%) to 85.6 +/- 0.755% (CV 0.882%) of the nominal concentration of 10.2 mg/L. Kendall (1999) is GLP-compliant, non-guideline study, with the method developed at Wildlife International. The study follows scientific principles and is considered suitable for use for this endpoint.