Registration Dossier
Registration Dossier
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EC number: 442-520-4 | CAS number: -
Adsorption / desorption
Administrative data
- Endpoint:
- adsorption / desorption: screening
- Remarks:
- estimation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From July 22nd, 2002 to July 23rd, 2002
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 002
- Report date:
- 2002
Materials and methods
Test guidelineopen allclose all
- 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))
- 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))
- Version / remarks:
- August 2001
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC estimation method
- Media:
- soil/sewage sludge
Test material
- Reference substance name:
- Yellow 6314-PPT
- IUPAC Name:
- Yellow 6314-PPT
- Test material form:
- solid
Constituent 1
- Radiolabelling:
- no
Study design
- Test temperature:
- 20 °C
HPLC method
- Details on study design: HPLC method:
- Column: LiChrospher 100 CN, part. size 5 μm, 250 mm × 4.6 mm
Mobile phase: 0.1 % phosphoric acid in water and acetonitrile (45:55 v/v); pH 3.7
Detection: 210 nm for reference items and for sodium nitrate, 448 nm for the test item solution
Temperature: 20 °C
Injection volume: 20 μl
Flow: 1.0 ml/min
Batch equilibrium or other method
- Computational methods:
- The adsorption coefficient (Koc) of the test item was interpolated from the calibraticn curve which was established by correlation of the log Koc values of various reference items with their log k' values. The capacity factor (k') is calculated from the retention time of the reference items, the test item and an unretarded item. Afterwards, a correlation of log k' versus log Kco of the reference items was plotted using linear regression. The log k' value of the test item was then used to calculate its log Koc value.
Results and discussion
Adsorption coefficientopen allclose all
- Type:
- Koc
- Value:
- 451 561 dimensionless
- Type:
- log Koc
- Value:
- 5.7 dimensionless
Results: HPLC method
- Details on results (HPLC method):
- Based on the chromatographic data, Yellow 6314-PPT was considered to be stable during the test procedure.
Applicant's summary and conclusion
- Conclusions:
- logKoc value is ca. 5.7; this value indicates that the test item is immobile and remains preferably in soil.
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