Registration Dossier
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EC number: 264-202-2 | CAS number: 63451-47-8
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
This study was considered reliable with restriction. Indeed, this study was showed that the limit of solubility of hydroxy(2-methylprop-2-enoato-O)zinc could not be reached because of the dependency of solubility on amount of the test item.
Key value for chemical safety assessment
- Water solubility:
- 10 mg/L
- at the temperature of:
- 20 °C
Additional information
Key study was performed according to OECD 105 and EU Method A.6 in order to determine the water solubility of hydroxy(2-methylprop-2-enoato-O)zinc.
The solubility of hydroxy(2-methylprop-2-enoato-O)zinc in water was determined from the measured concentrations of Zinc and methacrylic acid in the filtrated test solutions.
In the pre-test the test item showed poor solubility. Furthermore, dependency of solubility on amount of the test item (nominal load) was perceived.
In the main study, equilibration time can be considered as approx. three days, as the value which was measured on the following day did not give a significantly different value. All measured Zn concentrations showed poor correspondence, as dependency of solubility on amount of the test item (nominal load) was perceived.
At the plateau, the concentration of hydroxy(2-methylprop-2-enoato-O)zinc in water, related to Zinc, lay in the range 59.8 – 420.0 mg/L for the following nominal concentration range of the test item in water: 102 – 994 mg/L. Therefore, 41 – 59 % of the test item was dissolved in water relating to the nominal concentration of the test item.
The concentration of hydroxy(2-methylprop-2-enoato-O)zinc in water, related to methacrylic acid, lay in the range 327 – 769 mg/L for the following nominal concentration range of the test item in water: 388 – 994 mg/L. 73 – 84 % of the test item was dissolved in water relating to the nominal concentration of the test item.
The difference in the calculated test item concentrations related to Zinc and methacrylic acid may be a result of formation of Zinc oxide or hydroxide after dissolution of the test item in water.
The solubility of the complete test item was stated as < 10 mg/L, as only a part of the test item was dissolved in all flasks for all nominal concentrations of the test item in water.
This study was considered reliable with restriction. Indeed, this study was showed that the limit of solubility of hydroxy(2-methylprop-2-enoato-O)zinc
could not be reached because of the dependency of solubility on amount of the test item.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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