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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 9 Dec 2009 to 26 Apr 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
yes
Remarks:
This deviation does not impact the result of the study.
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method
Key result
Water solubility:
468.7 g/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
4.3
Key result
Water solubility:
119.6 g/L
Conc. based on:
element
Temp.:
20 °C
pH:
4.3
Details on results:
The magnesium concentration measured between the three sampling dates between 96h and 144h differed not more than 15% during the sampling dates and no tendency of increasing values were observed. So a saturation of the water phase with the test item in this period can be assumed and the water solubility is calculated as the mean value of the results between 96h and 144h.

As it is not appropriate to include the chemical combined water into the water solubility, it was stated as the water solubility of MgCL2 anhydrous.

Conclusions:
Interpretation of results: very soluble (> 10000 mg/L)
Magnesium chloride is very soluble
Executive summary:

The water solubility of magnesium chloride anhydrous was determined according to OECD Guideline 105 and EC method A.6 (92/69/EC).

The water solubility of Magnesium Chloride Anhydrous was determined in bidistilled water (being in equilibrium with atmospheric carbon dioxide) at 20°C +/- 0.5°C.

The magnesium concentration measured between the three sampling dates between 96h and 144h differed not more than 15% during the sampling dates and no tendency of increasing values were observed. So a saturation of the water phase with the test item in this period can be assumed and the water solubility is calculated as the mean value of the results between 96h and 144h.

The water solubility of Magnesium Chloride Anhydrous in bidistilled water (being in equilibrium with atmospheric carbon dioxide) at 20 °C +/- 0.5°C was determined to be 468.7 g/L. The pH of the saturated solution was pH 4.3

Description of key information

The water solubility of magnesium chloride anhydrous was determined according to OECD Guideline 105 and EC method A.6 (92/69/EC), using the flask method.

The water solubility of Magnesium Chloride Anhydrous was determined in bidistilled water (being in equilibrium with atmospheric carbon dioxide) at 20°C +/- 0.5°C.

The water solubility of Magnesium Chloride Anhydrous in bidistilled water (being in equilibrium with atmospheric carbon dioxide) at 20 °C +/- 0.5°C was determined to be 468.7 g/L. The pH of the saturated solution was pH 4.3.

Key value for chemical safety assessment

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

Additional information

The water solubility of the MgCl2 was investigated in one GLP-compliant study performed in accordance with standard methods, without deviations impacting the results of the study. The study is considered as reliable (Klimisch 1) and is selected as a key study for the endpoint.

An additional value of 546 g/L from the handbook "Ullmann's Encyclopedia of Industrial Chemistry. 5th ed" was found in the HSDB.

According to the high water solubility of the Magnesium Chloride, a Transformation/Dissolution protocol (T/Dp) does not seem relevant for the ecotoxicological assessment of the substance.