Copper, [29H,31H-phthalocyaninato(2-)-.kappa.N29,.kappa.N30,.kappa.N31,.kappa.N32]-, sulfonated, sodium salts

Adsorption / desorption

Link to relevant study record(s)

Reference

Reference 1

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

Reference 2

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

Description of key information

Adsorption to the solid soil phase is not expected.

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.