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Physical & Chemical properties

Water solubility

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water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006-09-19 to 2006-09-22
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 105 (Water Solubility)
Version / remarks:
, 1995
according to guideline
EU Method A.6 (Water Solubility)
Version / remarks:
, 1992
GLP compliance:
yes (incl. QA statement)
signed 2005-11
Type of method:
flask method
Water solubility:
> 669.6 g/L
Conc. based on:
test mat. (dissolved fraction)
Loading of aqueous phase:
1 080 g/L
Incubation duration:
24 h
20 °C
Remarks on result:
other: No pH values reported.
Details on results:
After mixing a total of about 5.4 g of the test item in 5 ml of water the test item was completely dissolved. Thus, the test item is miscible with water.
A main test using the flask shaking method was not possible as no saturated solution of test item in water can be prepared.
Due to the result in the preliminary test, the water solubility of Cobalt Nitrate Hexahydrate was found to be > 669.6g/L at room temperature. The water solubility was not corrected for the purity of the test item.
Interpretation of results: very soluble (> 10000 mg/L)
The water solubility of Cobalt Nitrate Hexahydrate was found to be > 669.6g/L and the water solubility of Co(NO3)2 is therefore > 421g/L at room temperature.

Description of key information

Cobalt dinitrate has a water solubility of > 669.6 g/L.

Key value for chemical safety assessment

Water solubility:
669.6 g/L
at the temperature of:
20 °C

Additional information