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Registration Dossier
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EC number: 939-524-8 | CAS number: 71949-28-5
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))
- GLP compliance:
- yes
- Type of method:
- HPLC estimation method
- Media:
- soil/sewage sludge
- Radiolabelling:
- no
- Test temperature:
- 23 °C
- Details on study design: HPLC method:
- EQUIPMENT
- Temperature: 23 °C
- Reference substance: Acetanilide - Type:
- log Koc
- Value:
- < 1.25
- Temp.:
- 23 °C
- Endpoint:
- adsorption / desorption
- Remarks:
- adsorption
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Calculation from experimentally derived Kow data using an equation from the 2003 EU Technical Guidance Document on Risk Assessment Part III, Chapter 4, Section 4.3
- Qualifier:
- according to guideline
- Guideline:
- other: 2003 EU Technical Guidance Document on Risk Assessment Part III, Chapter 4, Section 4.3, p. 26
- Principles of method if other than guideline:
- Log Koc was calculated using an equation derived from experimentally determined Kow values for analogue structures using the 2003 TGD equation for nonhydrophobic substances.
- GLP compliance:
- no
- Type of method:
- other: calculation from experimentally derived Kow
- Media:
- other: soil and sediment
- Radiolabelling:
- no
- Analytical monitoring:
- not required
- Type:
- log Koc
- Value:
- -1.11
- Type:
- Koc
- Value:
- 0.077
Referenceopen allclose all
Description of key information
Adsorption to the solid soil phase is not expected.
Key value for chemical safety assessment
Additional information
Based on the results of a HPLC measurement according to OECD Guideline 121, the log Koc of 'zinc phthalocyanine sulfonate' was estimated to be < 1.25 (BASF AG 2013). This indicates that the substance will not bind to soils and sediments. To get a defined value, the Koc was additionally estimated according to the EU Technical Guidance Document on Risk Assessment. Based on an experimentally derived log Kow value of -4.1 the log Koc was calculated to be -1.11 (Koc 0.077; BASF SE 2013). The calculation followed the equation for nonhydrophobic substances (log Koc = 0.52 log Pow + 1.02) as it is described 2003 in the EU Technical Guidance Document on Risk Assessment Part III, Chapter 4, Section 4.3 (pp 24 – 27). This value was used for the PNEC derivations.
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