Cobalt oxide

Water solubility

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Remarks:

The tests were following as close as possible the GLP guidelines proposed by OECD

Type of method:

flask method

Water solubility:

0.4 µg/L

Temp.:

22 °C

pH:

6

Remarks on result:

other: CoO concentration at 0 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

6.4 µg/L

Temp.:

23 °C

pH:

5.99

Remarks on result:

other: CoO concentration at 24 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

14 µg/L

Temp.:

23.1 °C

pH:

5.98

Remarks on result:

other: CoO concentration at 48 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

38.6 µg/L

Temp.:

23 °C

pH:

6.1

Remarks on result:

other: CoO concentration at 96 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

119.2 µg/L

Temp.:

23.3 °C

pH:

6.16

Remarks on result:

other: CoO concentration at 168 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

602.8 µg/L

Temp.:

23.1 °C

pH:

6.05

Remarks on result:

other: CoO concentration at 672 hour sampling time at 1 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

3.5 µg/L

Temp.:

21.4 °C

pH:

5.87

Remarks on result:

other: CoO concentration at 0 hour sampling time at 10 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

52.8 µg/L

Temp.:

22.7 °C

pH:

6

Remarks on result:

other: CoO concentration at 24 hour sampling time at 10 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

101.5 µg/L

Temp.:

22.1 °C

pH:

6

Remarks on result:

other: CoO concentration at 48 hour sampling time at 10 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

229.2 µg/L

Temp.:

21.9 °C

pH:

6.22

Remarks on result:

other: CoO concentration at 96 hour sampling time at 10 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Conclusions:

Under the conditions of the transformation/dissolution test, the dissolution of CoO is 602.8 µg/L at 1 mg/L loading for the 28-day endpoint.
The dissolution of CoO is 607.6 µg/L at 10 mg/L loading for the 7-day endpoint.
The dissolution of CoO is 32825.0 µg/L at 100 mg/L loading for the 7-day endpoint.

Executive summary:

A seven day transformation/dissolution test according to the OECD guideline 29 and the GHS (Annex 10) protocol was run on CoO at a mass loading of 10 and 100 mg/L, at a pH of 6.0 Also a 28 day transformation/dissolution was run on CoO at a mass loading of 1 mg/L and at a pH of 6.0. Under the conditions of this test, the dissolution of CoO is 602.8 µg/L for the 28 -day endpoint (1 mg/L loading), 607.6 µg/L for the 7 -day endpoint (10 mg/L loading) and 32825.0 µg/L for the 7 -day endpoint (100 mg/L loading).

Reference 2

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Remarks:

The tests were following as close as possible the GLP guidelines proposed by OECD

Type of method:

flask method

Water solubility:

607.6 µg/L

Temp.:

22.1 °C

pH:

6.11

Remarks on result:

other: CoO concentration at 168 hour sampling time at 10 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

30.7 µg/L

Temp.:

21.5 °C

pH:

5.85

Remarks on result:

other: CoO concentration at 0 hour sampling time at 100 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

663.5 µg/L

Temp.:

21.6 °C

pH:

6.1

Remarks on result:

other: CoO concentration at 24 hour sampling time at 100 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

2 138 µg/L

Temp.:

21.2 °C

pH:

6.08

Remarks on result:

other: CoO concentration at 48 hour sampling time at 100 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

18 581.5 µg/L

Temp.:

21.9 °C

pH:

6.21

Remarks on result:

other: CoO concentration at 96 hour sampling time at 100 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Water solubility:

32 825 µg/L

Temp.:

21.1 °C

pH:

6.91

Remarks on result:

other: CoO concentration at 168 hour sampling time at 100 mg/L loading. Sample analysis was conducted in triplicate per test vessel (3 test vessels per loading). Average value from the tests is given.

Conclusions:

Under the conditions of the transformation/dissolution test, the dissolution of CoO is 602.8 µg/L at 1 mg/L loading for the 28-day endpoint.
The dissolution of CoO is 607.6 µg/L at 10 mg/L loading for the 7-day endpoint.
The dissolution of CoO is 32825.0 µg/L at 100 mg/L loading for the 7-day endpoint.

Executive summary:

A seven day transformation/dissolution test according to the OECD guideline 29 and the GHS (Annex 10) protocol was run on CoO at a mass loading of 10 and 100 mg/L, at a pH of 6.0 Also a 28 day transformation/dissolution was run on CoO at a mass loading of 1 mg/L and at a pH of 6.0. Under the conditions of this test, the dissolution of CoO is 602.8 µg/L for the 28 -day endpoint (1 mg/L loading), 607.6 µg/L for the 7 -day endpoint (10 mg/L loading) and 32825.0 µg/L for the 7 -day endpoint (100 mg/L loading).

Reference 3

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2009-03-31 to 2009-05-12

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

, adopted 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

, 2008

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

signed 2008-11-12

Type of method:

column elution method

Specific details on test material used for the study:

not specified

Water solubility:

4.88 mg/L

Temp.:

20 °C

pH:

ca. 7.48

Water solubility:

3.27 mg/L

Temp.:

37 °C

pH:

ca. 7.76

Details on results:

During this study the water solubility of cobalt monoxide (C3PTL) at 20 °C and at 37 °C was found to be 4.88 mg/L at 20 °C and 3.27 mg/L at 37 °C using the column elution method.

Conclusions:

Interpretation of results: slightly soluble (0.1 - 100 mg/L)
During this study the water solubility of cobalt monoxide (C3PTL) at 20 °C and at 37 °C was found to be 4.88 mg/L at 20 °C and 3.27 mg/L at 37 °C using the column elution method.

Description of key information

The water solubility of cobalt monoxide is 4.88 mg/L at 20 °C and 3.27 mg/L at 37 °C.

Key value for chemical safety assessment

Water solubility:

4.88 mg/L

at the temperature of:

20 °C