Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

Adsorption / desorption

Administrative data

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Between 04 June 2009 and 17 August 2009.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP and in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do no effect the quality of the relevant results

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method C.19 (Estimation of the Adsorption Coefficient (KOC) on Soil and Sewage Sludge Using High Performance Liquid Chromatography (HPLC))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of GLP inspection: 19/08/2008 Date of Signature on GLP certificate: 4/03/2009

Type of method:

other: HPLC screening method

Media:

other:

Test material

Test material information

Constituent 1

Reference substance name:

Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

EC Number:

935-853-6

IUPAC Name:

Reaction mass of 2-(3-ethylphenyl)oxirane and 2,2’-(1,3-phenylene)dioxirane and 2,2'-(1,4-phenylene)dioxirane

Constituent 2

Reference substance name:

Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane

IUPAC Name:

Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane

Constituent 3

Reference substance name:

DVBDO and EVBO (divinylbenzene dioxide and ethylvinylbenzene oxide)

IUPAC Name:

DVBDO and EVBO (divinylbenzene dioxide and ethylvinylbenzene oxide)

Details on test material:

- Name of test material (as cited in study report): Reaction mass of bis(epoxyethyl) benzene and (ethylphenyl) oxirane

- Substance type: Multiconstituent
- Physical state: clear extremely pale yellow liquid
- Analytical purity: 80 - 95%

- Impurities (identity and concentrations):
2-(4-ethylphenyl)oxirane : 6.4 %(w/w)
2-(4-ethenylphenyl)oxirane : 0.1% (w/w)
2-(3-ethenylphenyl)oxirane) : 1.4% (w/w)

- Composition of test material, percentage of components:
Oxirane, 2,2’-(1,3-phenylene)bis- : 53.0%
Oxirane, 2,2’-(1,4-phenylene)bis- : 27.0%
Oxirane, 2-(3-ethylphenyl)- : 13.0%
Oxirane, 2-(4-ethylphenyl)- : 7.0%

- Lot/batch No.: 200901317-17

- Stability under test conditions : decomposes above boiling temperature
- Storage condition of test material : approximately 4°C in the dark

Radiolabelling:

no

Study design

Test temperature:

EXAMPLE: 40ºC

HPLC method

Details on study design: HPLC method:

Preparation of sample solution:
Test material (0.0605 g) was diluted to 50 ml with acetonitrile.

Determination of retention time:
The sample, formamide and reference standard solutions were injected in duplicate using the following HPLC parameters:

HPLC System: Agilent Technologies 1200, incorporating autosampler and workstation
Column: Phenosphere Next CN 5µ (250 x 4.6 mm id)
Column temperature: 30 ºC
Mobile phase: methanol: water (55:45)
pH of mobile phase: 7.2
Flow-rate: 1 mL/min
UV detector wavelength: dead time and reference standards: 210 nm, sample: 220 nm
Injection volume: 10 µL

Construction of calibration curve:
A calibration curve was constructed from the retention time data of the formamide and reference standard solutions. The capacity factors (k) for the reference standards were calculated using Equation 8.1 (see below)

Adsorption coefficient of sample:
The capacity factor was calculated using Equation 8.1 (see below) and the log10 Koc value determined with reference to the calibration curve.


Calculation
The capacity factor was determined using Equation 8.1 (please see below).
EXAMPLE:

Batch equilibrium or other method

Analytical monitoring:

no

Details on sampling:

- Concentrations:
- Sampling interval:
- Sample storage before analysis:

Results and discussion

Adsorption coefficient

Adsorption coefficient 1

Type:

Koc

Value:

64.4 - 318

Adsorption coefficient 2

Type:

log Koc

Value:

1.81 - 2.5

Results: Batch equilibrium or other method

Adsorption and desorption constants:

Not applicable

Recovery of test material:

Not applicable

Concentration of test substance at end of adsorption equilibration period:

Not applicable

Concentration of test substance at end of desorption equilibration period:

Not applicable

Transformation products:

not measured

Details on results (Batch equilibrium method):

Not applicable.

Statistics:

None stated.

Any other information on results incl. tables

Calibration

The retention times of formamide and the retention times, capacity factors (k) and log₁₀K_ocvalues for the reference standards are shown in the two following tables:

Dead Time	Retention Time (mins)		Mean Retention Time (mins)
	Injection 1	Injection 2
Formamide	3.518	3.494	3.506

Standard	Retention Time (mins)		Mean Retention Time (mins)	Capacity Factor (k)	Log10k	Log10Koc
	Injection 1	Injection 2
Acetanilide	4.254	4.258	4.256	0.214	-0.670	1.25
Phenol	4.270	4.270	4.270	0.218	-0.662	1.32
Atrazine	4.755	4.762	4.759	0.357	-0.447	1.81
Isoproturon	5.171	5.179	5.175	0.476	-0.322	1.86
Triadimenol	5.605	5.547	5.576	0.590	-0.229	2.40
Linuron	6.464	6.462	6.463	0.843	-7.40 x 10^-2	2.59
Naphthalene	8.095	8.079	8.087	1.307	0.116	2.75
Endosulfan-diol	6.330	6.345	6.338	0.808	-9.28 x 10^-2	3.02
Fenthion	10.728	10.686	10.707	2.054	0.313	3.31
a-Endosulfan	11.056	11.054	11.055	2.153	0.333	4.09
Phenanthrene	14.365	14.302	14.329	3.087	0.490	4.09
Diclofop-methyl	13.372	13.373	13.373	2.814	0.449	4.20
DDT	31.719	31.576	31.648	8.027	0.905	5.63

Adsorption coefficient of sample

The retention times, capacity factors and log₁₀K_ocvalues determined for the sample are shown in the following table:

Peak Number	Injection	Retention Time  (mins)	Capacity Factor  (k)	Log10k	Log10Koc	Mean Log10Koc
1	1	4.887	0.394	-0.405	1.81	1.81
	2	4.891	0.395	-0.403	1.81
2	1	5.970	0.703	-0.153	2.50	2.50
	2	5.976	0.705	-0.152	2.51

log₁₀K_ocrange:                    1.81 to 2.50
Adsorption coefficient:        64.4 to 318

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

The adsorption coefficient (Koc) of the test material has been determined to be 64.4 to 318, log10 Koc 1.81 to 2.50.

Executive summary:

The determination was carried out using the HPLC screening method, Method C19 Adsorption Coefficient ofCommissionRegulation (EC) No 440/2008 of 30 May 2008.  The adsorption coefficient (K_oc) of the test material has been determined to be 64.4 to 318, log₁₀K_oc 1.81 to 2.50.

This is an indication that the substance is unlikely to adhere to soil particles in the environment.