Reaction mass of Cobaltate(3-), bis[2-[[[3-[2-[1-[[(2-chlorophenyl)amino]carbonyl]-2-(oxo-κO)propyl]diazenyl-κN1]-4-(hydroxy-κO)phenyl]sulfonyl]amino]benzoato(3-)]-, sodium (1:3) and tetrasodium bis[2-[[[3-[[1-[(2-chloroanilino)carbonyl]-2-oxopropyl]azo]-4-hydroxyphenyl]sulphonyl]amino]benzoato(3-)]cobaltate(4-)

Adsorption / desorption

Link to relevant study record(s)

Reference

Endpoint:

adsorption / desorption: screening

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2014

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

Media:

other: HPLC-column

Specific details on test material used for the study:

Name: FAT 92368/Y
Batch number: 1309001
EAS Test item code: 2014-000177
Appearance / colour: solid / orange brown
Date of analysis: 04 Oct 2013
Stability in solution: sufficient for the test purpose (at least 1h)
Expiry date: 30 Sep 2018
Storage conditions: ambient (+5 to +30 °C), dark, dry

Radiolabelling:

no

Test temperature:

25 °C

Details on study design: HPLC method:

HPLC-system:
Agilent Technologies 1260 Infinity
Quaternary pump G1311B
Autosampler ALS G1367E
Column oven G1316A
Detector DAD G4212B

Column specification: EC 150/4.6 Nucleodur 100-5 CN-RP 150 x 5
Column temperature: 25 °C
Detection wavelength standard solutions: 220 nm
Detection wavelength test item: 277 nm
Mobile phase: Methanol/water (55/45 ,v/v)
Flow rate: 0.5 mL/min
Injection volume: 2 µL (reference items); 2 µL (test item)

Analytical monitoring:

not specified

Details on sampling:

The test item sample was prepared by weighing 25.0 mg of the test item into a 25 mL volumetric flask and brought to volume with methanol. The final concentration of FAT 92368/Y TE was 1000 mg/L.

Details on matrix:

A moderately polar stationary phase based on a silica matrix was used (Nucleodur 100-5 CN-RP). A 55/45 (v/v) methanol/ water mixture was used as mobile phase and the column temperature was 25 °C.

Details on test conditions:

The measurements were performed at 25 °C in a column thermostat.

Type:

log Koc

Value:

< 1.5

Temp.:

25 °C

Details on results (HPLC method):

The aim of this study was the determination of the adsorption coefficient of the test item FAT 92368/Y by high performance liquid chromatography (HPLC) method according to EC method C.19 and OECD guideline 121. The analysis was performed on an analytical column packed with a commercially available cyanopropyl solid phase containing lipophilic and polar moieties. A moderately polar stationary phase based on a silica matrix was used (Nucleodur 100-5 CN-RP). A 55/45 (v/v) methanol/ water mixture was used as mobile phase and the column temperature was 25 °C. FAT 92368/Y eluted with a retention time of 2.46 min. The calculated adsorption coefficient is therefore below the determination limit of the method (<1.5).

Two measurements were made under identical conditions using the same set of reference items. Four chromatograms of the test item were recorded per measurement. The dead time was determined with sodium nitrate. The whole measurement was accomplished two times to be sure that the variation of the determined log Koc is within a range of± 0.25 log units and to fulfil the requirements of EC method C.19 and OECD guideline 121 concerning the quality criteria.

Validity criteria fulfilled:

yes

Conclusions:

The mean log Koc of test substance FAT 92368/Y was found to be <1.5

Executive summary:

The aim of this study was the determination of the adsorption coefficient of the test item FAT 92368/Y by high performance liquid chromatography (HPLC) method according to EC method C.19 and OECD guideline 121.The analysis was performed on an analytical column packed with a commercially available cyanopropyl solid phase containing lipophilic and polar moieties. A moderately polar stationary phase based on a silica matrix was used (Nucleodur 100-5 CN-RP). A55/45 (v/v) methanol/water mixture was used as mobile phase and the column temperature was 25 °C. FAT 92368/Y eluted with a retention time of 2.46 min. The calculated adsorption coefficient is therefore below the determination limit of the method.

The results are listed below:

The mean log Koc of test substance FAT 92368/Y was found to be <1.5

Peak No.	Mean retention time of two runs [min]	Absolute deviation [min]	Mean log Kocof two runs
1	2.46	0.06	<1.5 (-3.65)*

*: below determination limit of the method

Description of key information

The mean log Koc of the test substance was found to be <1.5

Key value for chemical safety assessment

Koc at 20 °C:

31.6

Additional information

The aim of this study was the determination of the adsorption coefficient of the test item FAT 92368/Y by high performance liquid chromatography (HPLC) method according to EC method C.19 and OECD guideline 121.The analysis was performed on an analytical columnpacked with a commercially available cyanopropyl solid phase containing lipophilic and polar moieties. A moderately polar stationary phase based on a silica matrix was used (Nucleodur 100-5 CN-RP). A55/45 (v/v) methanol/watermixturewas used as mobile phase and the column temperature was 25 °C. FAT 92368/Y eluted with a retention time of 2.46 min. The calculated adsorption coefficient is therefore below the determination limit of the method.

 

The results are listed below:

The mean log Koc of test substance FAT 92368/Y was found to be <1.5

Peak No.	Mean retention time of two runs [min]	Absolute deviation [min]	Mean log Kocof two runs
1	2.46	0.06	<1.5 (-3.65)*

*: below determination limit of the method