Registration Dossier
Registration Dossier
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EC number: 236-769-6 | CAS number: 13477-39-9
Water solubility
Administrative data
Link to relevant study record(s)
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- December 04, 2015 until June 27, 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Key result
- Water solubility:
- 1.128 mg/L
- Conc. based on:
- test mat.
- Loading of aqueous phase:
- 201.6 mg/L
- Incubation duration:
- >= 15 - <= 17 d
- Temp.:
- 20 °C
- pH:
- >= 5 - <= 5.4
Reference
Under the conditions of this test (flask method; loadings of 201.6 mg test item/L and 201.0 mg test item/L in vessel 1 and 2, respectively), a solubility equilibrium was observed during the testing (days 15 – 17). The mean amount of dissolved calcium, during the test at 20.0 ± 1.0°C is 237.93 ± 9.47 μg Ca/L (determined as dissolved Ca, separated by filtration from undissolved test item). This corresponds to calculated dissolved calcium bis(metaphosphate) of 1128.49 ± 44.94 μg test item/L. The pH in test item loaded vessels as well as in method blanks clearly showed decreasing pH values.
As the ultrapure water was directly used after taken from the ultrapure water device, carbon
dioxide will probably dissolve over time and acidify the media. The pH after 1 day in test item
loaded vessels was clearly lower than in method blanks. This showing is clearly due to the
dissolution of the test item.
Description of key information
Water solubility: 1128.49 μg test item/L.0.913 mg/L (OECD 105, flask method, GLP)
Key value for chemical safety assessment
- Water solubility:
- 1.128 mg/L
- at the temperature of:
- 20 °C
Additional information
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