Dimethyl sulphide

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

Test material information

Constituent 1

Reference substance name:

Dimethyl sulphide

EC Number:

200-846-2

EC Name:

Dimethyl sulphide

Cas Number:

75-18-3

Molecular formula:

C2H6S

IUPAC Name:

(methylsulfanyl)methane

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.