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EC number: 215-204-7 | CAS number: 1313-27-5
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:
- 2008-01-29 to 2008-04-09
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- Principles of method if other than guideline:
- The quantity of test substance (estimated from preliminary test) should be about 5 times that quantity. In this study 3.9 times the quantity of test material was used.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Key result
- Water solubility:
- 1 g/L
- Temp.:
- 20 °C
- pH:
- 2.5
- Details on results:
- The concentration measured between the 4 sampling dates (see attached material) between 72 and 144 hours 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 72 and 144 hours.
- Conclusions:
- The water solubility of molybdenum trioxide in bidistilled water (being in equilibrium with atmospheric carbon dioxide) at 20 ± 0.5°C is determined to be 1.0 g/L (soluble). The pH of the saturated solution was pH 2.5.
Reference
Description of key information
The water solubility (acc. OECD TG 105) of molybdenum trioxide has been determined with a representative sample to be 1 g/L at 20°C.
In addition to the standard OECD TG 105 water solubility study, the substance has also been tested in a bioelution study (in vitro bioaccessibility) in artificial gastric juice. This test and the results are described in the stand-alone document „MoCon read-across concept (human health)“, which is attached to the technical dossier in IUCLID section 13.
Key value for chemical safety assessment
- Water solubility:
- 1 g/L
- at the temperature of:
- 20 °C
Additional information
In addition to the standard OECD TG 105 water solubility study, the substance has also been tested in a bioelution study (in vitro bioaccessibility) in artificial gastric juice. This test and the results are described in the stand-alone document „MoCon read-across concept (human health)“, which is attached to the technical dossier in IUCLID section 13.
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