Registration Dossier
Registration Dossier
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EC number: 268-582-0 | CAS number: 68130-25-6
Adsorption / desorption
Administrative data
Link to relevant study record(s)
- Endpoint:
- adsorption / desorption: screening
- Type of information:
- experimental study
- Adequacy of study:
- key study
- 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))
- 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
- Details on study design: HPLC method:
- EQUIPMENT
HPLC System : Agilent Technologies 1200 Series
Detector types : (UV) variable wavelength detector
Column : XSelect Cyano, 5 μm (150 x 4.6 mm id)
Column temperature : 30 °C
Mobile phase : Methanol : water (55:45 v/v)
pH of the mobile phase (aqueous) : 6.4
Flow rate : 1.0 mL/min
Injection volume : 10 μL
UV Wavelength( : 210 nm
DETERMINATION OF DEAD TIME
- Method: The dead time was determined by measuring the retention time of formamide (purity*: 99.94%, 0.641 g/L solution in methanol:water, 55:45 v/v).
REFERENCE SUBSTANCES
- Identity: Solutions of reference standards (see below) were prepared in methanol.
Acetanilide
Phenol
Atrazine
Triadimenol
Linuron
Naphthalene
Endosulfan-diol
Fenthion
α-Endosulfan
Phenanthrene
Diclofop-methyl
DDT
- Key result
- Type:
- log Koc
- Value:
- > 5.63 dimensionless
- pH:
- 7
- Temp.:
- 20 °C
- Validity criteria fulfilled:
- yes
- Conclusions:
- The adsorption coefficient (Koc) of the test item has been determined to be greater than 4.27 x 10^5, log10 Koc >5.63.
- Executive summary:
Adsorption Coefficient. Greater than 4.27 x 105, log10 Koc >5.63, using the HPLC screening method, designed to be compatible with Method C.19 Adsorption Coefficient of Commission Regulation (EC) No 440/2008 of 30 May 2008, Method 121 of the OECD Guidelines for Testing of Chemicals, 22 January 2001.
Reference
Description of key information
The adsorption coefficient (Koc) of the test item has been determined to be greater than 4.27 x 10^5, log10 Koc >5.63.
Key value for chemical safety assessment
- Koc at 20 °C:
- 427 000
Additional information
[LogKoc: 5.63]
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