3-methyl-1-vinyl-1H-imidazolium chloride

Adsorption / desorption

Link to relevant study record(s)

Reference

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

key study

Study period:

11 Jan 2017 to 13 Jan 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC))

GLP compliance:

yes

Type of method:

HPLC estimation method

Specific details on test material used for the study:

- Name of test material (as cited in study report): 3-Methyl-1-vinyl-1H-imidazolium chloride
- Expiry date: 2017-05-20
- Appearance: White, solid

Radiolabelling:

no

Test temperature:

35 °C

Details on study design: HPLC method:

HPLC CONDITIONS
- Column: Lichrospher 100 CN, 250 x 4 mm, 5 µm
- Column temperature: 35 °C
- Eluent: 0.01M citrate buffer pH 6 / methanol (50 : 50 (v/v))
- Flow rate: 1.0 mL / min
- Injection volume: 50 µL
- Detector: RI-Detector Temp. = 40 °C, SR2, Sens. 64

REFERENCE ITEMS
- The following reference items were used: Sodium nitrate p.a., Acetanilide p.a., Naphthalene, Phenol, Phenathrene, Linuron and Methylbenzoate. See 'Any other information on materials and methods incl. tables' for the determined retention time of the reference items.

Analytical monitoring:

no

Key result

Type:

log Koc

Value:

1.71 dimensionless

Temp.:

35 °C

Remarks on result:

other: pH values of solutions could not be determined as pH value is only defined for aqueous solutions.

Details on results (HPLC method):

A retention time of 4.014 min was determined for the test item. See 'Any other information on results incl. tables'.

Transformation products:

not measured

Table: results for the test substance (duplicate analysis with duplicate injection each).

	tR sample 1 [min]	tR sample 2 [min]	tR mean [min]	Capacity factor (k'=(tr-t0) / t0	log k' (1)	log Koc
Test item	4.007	4.018	4.014	0.641	-0.193	1.71
	4.011	4.020

1) calculated from the non-rounded mean retention times.

Description of key information

The Koc was determined to be 51.3 L/kg (log Koc 1.71) in a GLP-compliant OECD 121 study. Adsorption to the solid soil phase is not expected.

Additional information

The adsorption behaviour of the substance was determined in a study according to OECD TG 121 (HPLC method) and in compliance with GLP criteria (BASF, 2017). In this study solutions of reference substances with known log Koc values based on soil adsorption data and the test substance were analysed by HPLC using a Lichrospher 100 CN column. The log k’ values of reference substances were plotted against the known log Koc values. The log Koc value for the test substance was calculated by substituting its mean log k’ in the calibration curve. Under the conditions of the test, the Koc of the substance was determined at 51.3 L/kg (log Koc = 1.71).