2,6-dimethylmorpholine

Adsorption / desorption

Administrative data

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study according to OECD 106

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1988

Report date:

1988

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 106 (Adsorption - Desorption Using a Batch Equilibrium Method)

GLP compliance:

yes (incl. QA statement)

Type of method:

batch equilibrium method

Media:

soil

Test material

Test material information

Constituent 1

Reference substance name:

2,6-dimethylmorpholine

EC Number:

205-509-3

EC Name:

2,6-dimethylmorpholine

Cas Number:

141-91-3

Molecular formula:

C6H13NO

IUPAC Name:

2,6-dimethylmorpholine

Details on test material:

- Name of test material (as cited in study report): 2,6-dimethylmorpholine
- Other: metabolite of tridemorph

Radiolabelling:

yes

Study design

Test temperature:

20-22 °C

Batch equilibrium or other method

Analytical monitoring:

yes

Details on sampling:

Recovery test in aqueous soil extracts:
- 20 g of soil were shaken with 100 m1 0.01 M aqueous calcium chloride solution on a mechanical shaker for 90 min
- the soil-water suspension was then centrifuged
- the water extract was decanted from the soil residue
- 10 m1 aliquot of the water extract (corresponding to 2 g soil) was fortified with 2.6-dimethylmorpholine in four different concentrations equal to approx. 0.05, 0.2., 1 and 5 mg/l
- 1 m1 aliquot of the fortified water extract was then radioassayed

Adsorption screening test:
- 2 g soil were shaken with 10 m 1 0.01 M aqueous calcium chloride solution containing approx. 5 mg/l Tridemorph on 8 mechanical shaker f o r 16 hours
- the soil/water suspension was then centrifuged
- the water extract was decanted from the soil residue and the water volume was measured
- 1 ml aliquot of the water extract was then radioassayed.

Results and discussion

Results: Batch equilibrium or other method

Recovery of test material:

On all four treated soils less than 25 % (0.9 - 16 %) of the 2,6-dimethylmorpholine are adsorbed. Therefore, according to OECD 106, no further investigations were carried out.

Applicant's summary and conclusion

Conclusions:

Leaching of 2,6-dimethylmorpholine into deeper soil layers cannot be excluded.