Registration Dossier
Registration Dossier
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EC number: 940-594-7 | CAS number: -
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption, other
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 29 January 2013 - 22 May 2013
- Reliability:
- 1 (reliable without restriction)
- 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))
- Deviations:
- no
- 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)
- Type of method:
- HPLC estimation method
- Test temperature:
- 25ºC
- Details on study design: HPLC method:
- EQUIPMENT
- Apparatus:Agilent 1200 Series Liquid Chromatograph with Chemstation software
- Type, material and dimension of analytical (guard) column: HyperClone CN (CPS) (25 cm x 4.6 mm internal diameter)
- Detection system: UV set at 210 nm
MOBILE PHASES
- Type: Acetonitrile:tetrahydrofuran:water (30:25:45 v/v/v)
- Experiments with additives carried out on separate columns: no
DETERMINATION OF DEAD TIME
- Method: An internal standard (formamide) with no retention on the HPLC column was used to determine the deadtime of the HPLC system.
REFERENCE SUBSTANCES
- Identity:
Internal deadtime standard (I.D.S.)
Acetanilide
Nitrobenzene
Naphthalene
2-Methylnaphthalene
Anthracene
DDT
DETERMINATION OF RETENTION TIMES
- Quantity of test substance introduced in the column: approximately 100 mg/l
REPETITIONS
- Number of determinations: Duplicates.
EVALUATION
- Calculation of capacity factors k':
- Calculation of retention times:
- Determination of the log Koc value: - Key result
- Type:
- log Koc
- Value:
- > 5.6 dimensionless
- Temp.:
- 25 °C
- Details on results (HPLC method):
- The first eluting peak at 2.8 minutes in the standard and sample chromatograms was the internal deadtime standard, formamide. It was evident that all components of the reference mixture eluted earlier than the main components of AO-26 under the test
conditions, with the last standard (DDT, known log10Koc = 5.6) eluting after 6.7 minutes. A value of log10Koc for AO-26 of greater than 5.6 was thus obtained. - Validity criteria fulfilled:
- yes
- Conclusions:
- The main components of AO-26 were found to have log10Koc values of greater than 5.6.
- Executive summary:
OECD 121
Soil adsorption - Log10Koc > 5.6
Reference
Description of key information
The main components of AO-26 were found to have log10Koc values of greater than 5.6.
Key value for chemical safety assessment
- Koc at 20 °C:
- 398 107
Additional information
[LogKoc: 5.6]
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