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Physical & Chemical properties

Water solubility

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Administrative data

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Endpoint:
water solubility
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 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:
149.8 µg/L
Temp.:
19.5 °C
pH:
7.97
Remarks on result:
other: Cobalt oxalate 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:
282.2 µg/L
Temp.:
21.8 °C
pH:
8.02
Remarks on result:
other: Cobalt oxalate 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:
276.2 µg/L
Temp.:
22.2 °C
pH:
8.06
Remarks on result:
other: Cobalt oxalate 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:
268.6 µg/L
Temp.:
22.3 °C
pH:
8.02
Remarks on result:
other: Cobalt oxalate 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:
262.8 µg/L
Temp.:
22.1 °C
pH:
8.04
Remarks on result:
other: Cobalt oxalate 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:
225.1 µg/L
Temp.:
22.1 °C
pH:
8
Remarks on result:
other: Cobalt oxalate 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:
2 101 µg/L
Temp.:
22 °C
pH:
7.92
Remarks on result:
other: Cobalt oxalate 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:
3 157.8 µg/L
Temp.:
22.9 °C
pH:
8
Remarks on result:
other: Cobalt oxalate 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:
3 063.1 µg/L
Temp.:
23.1 °C
pH:
8.03
Remarks on result:
other: Cobalt oxalate 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:
2 983.3 µg/L
Temp.:
24 °C
pH:
7.83
Remarks on result:
other: Cobalt oxalate 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 Cobalt oxalate is 225.1 µg/L at 1 mg/L loading for the 28-day endpoint.
The dissolution of Cobalt oxalate is 2863.6 µg/L at 10 mg/L loading for the 7-day endpoint.
The dissolution of Cobalt oxalate is 28040.1 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 Cobalt Oxalate at a mass loading of 10 and 100 mg/L, at a pH of 8.0. Also a 28 day transformation/dissolution was run on Cobalt Oxalate at a mass loading of 1 mg/L and at a pH of 8.0. Under the conditions of this test, the dissolution of Cobalt Oxalate is 225.1 µg/L for the 28 -day endpoint (1 mg/L loading), 2863.6 µg/L for the 7 -day endpoint (10 mg/L loading) and 28040.1 µg/L for the 7 -day endpoint (100 mg/L loading).
Endpoint:
water solubility
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 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:
2 863.6 µg/L
Temp.:
22.4 °C
pH:
8
Remarks on result:
other: Cobalt oxalate 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:
12 300.8 µg/L
Temp.:
22.6 °C
pH:
7.9
Remarks on result:
other: Cobalt oxalate 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:
22 812.8 µg/L
Temp.:
22.4 °C
pH:
7.95
Remarks on result:
other: Cobalt oxalate 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:
26 387.1 µg/L
Temp.:
23.1 °C
pH:
8
Remarks on result:
other: Cobalt oxalate 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:
28 372.1 µg/L
Temp.:
23.8 °C
pH:
7.87
Remarks on result:
other: Cobalt oxalate 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:
28 040.1 µg/L
Temp.:
22.4 °C
pH:
8
Remarks on result:
other: Cobalt oxalate 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 Cobalt oxalate is 225.1 µg/L at 1 mg/L loading for the 28-day endpoint.
The dissolution of Cobalt oxalate is 2863.6 µg/L at 10 mg/L loading for the 7-day endpoint.
The dissolution of Cobalt oxalate is 28040.1 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 Cobalt Oxalate at a mass loading of 10 and 100 mg/L, at a pH of 8.0. Also a 28 day transformation/dissolution was run on Cobalt Oxalate at a mass loading of 1 mg/L and at a pH of 8.0. Under the conditions of this test, the dissolution of Cobalt Oxalate is 225.1 µg/L for the 28 -day endpoint (1 mg/L loading), 2863.6 µg/L for the 7 -day endpoint (10 mg/L loading) and 28040.1 µg/L for the 7 -day endpoint (100 mg/L loading).
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2009-03-31 to 2009-04-27
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
- The stability of the test material was not available.
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Version / remarks:
adopted 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Council Regulation (EC) No. 440/2008, A6. Water solubility, 30 May 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed 2008-11-12
Type of method:
flask method
Water solubility:
32.2 mg/L
Conc. based on:
test mat. (dissolved fraction)
Temp.:
20 °C
pH:
ca. 6.52
Water solubility:
38.9 mg/L
Conc. based on:
test mat. (dissolved fraction)
Temp.:
37 °C
pH:
ca. 6.46
Details on results:
During this study the water solubility of cobalt oxalate at 20 °C and at 37 °C were determined using the flask method and was found to be 32.2 mg/L at 20 °C based on a measured concentration of 10.4 mg Co/L and 38.9 mg/L at 37 °C based on a measured concentration of 12.5 mg Co/L.
Conclusions:
Interpretation of results: slightly soluble (0.1-100 mg/L)
During this study the water solubility of cobalt oxalate at 20 °C and at 37 °C were determined using the flask method and was found to be 32.2 mg/L at 20 °C based on a measured concentration of 10.4 mg Co/L and 38.9 mg/L at 37 °C based on a measured concentration of 12.5 mg Co/L.

Description of key information

Cobalt oxalate has a water solubility of 32.2 mg/L at 20 °C and of 38.9 mg/L at 37 °C.

Key value for chemical safety assessment

Water solubility:
32.2 mg/L
at the temperature of:
20 °C

Additional information