Registration Dossier
Registration Dossier
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EC number: 231-203-4 | CAS number: 7446-26-6
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:
- March 2017 until August 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:
- 12.87 mg/L
- Conc. based on:
- test mat.
- Loading of aqueous phase:
- 251.2 mg/L
- Incubation duration:
- > 1 - <= 3 d
- Temp.:
- 20 °C
- pH:
- >= 6.5 - <= 6.7
Reference
Under the conditions of this test (flask method; loadings of 251.0 mg/L test item and 251.4 mg/L test item in vessel 1 and 2, respectively), the solubility of dizinc pyrophosphate was determined during the testing period of three days. The variation between samplings was 11 % between day 2/day 1 and 7.4 % between day 3/day 2. The mean amount of dissolved zinc, during the test at 20.0 ± 0.1°C was 5.563 ± 0.490 mg/L Zn (determined as dissolved Zn, separated by filtration from undissolved test item). This corresponds to a calculated solubility of dizinc pyrophosphate of 12.87 ± 1.13 mg/L. The pH in test item loaded vessels increased to 6.5 – 6.7, whereas the pH in method blanks were in in the range of 5.7 – 5.9.
Description of key information
water solubility: 12.87 mg/L at loading rate of 251.2 mg/L, 20 °C and pH 6.5 -6.7 (OECD 105, EU A.6., flask method)
Key value for chemical safety assessment
- Water solubility:
- 12.87 mg/L
- at the temperature of:
- 20 °C
Additional information
The water solublity of the test item was determined using flask method according to OECD 105 and EU Method A.6.
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