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EC number: 271-672-2 | CAS number: 68603-74-7
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 04 Sep 2018 - ****
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Updated information. Study now available and provided ahead of extended submission date of 31/05/2019.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 019
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- column elution method
Test material
- Reference substance name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- EC Number:
- 271-672-2
- EC Name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- Cas Number:
- 68603-74-7
- Molecular formula:
- The substance is a UVCB so there is no molecular formula
- IUPAC Name:
- Amines, N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates
- Test material form:
- solid
Constituent 1
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Expiration date of the lot/batch: 30 April 2019
- Purity test date: Not specified
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: At room temperature
- Stability under test conditions: Stable at a maximum of 50°C
Results and discussion
Water solubilityopen allclose all
- Water solubility:
- >= 0 - <= 0.001 g/L
- Conc. based on:
- test mat.
- Loading of aqueous phase:
- 0.1 g/L
- Incubation duration:
- ca. 24 - ca. 72 h
- Temp.:
- 20 °C
- pH:
- >= 7.5 - <= 7.9
- Water solubility:
- >= 0.001 - <= 0.001 g/L
- Conc. based on:
- test mat.
- Loading of aqueous phase:
- 1 g/L
- Incubation duration:
- ca. 24 - ca. 72 h
- Temp.:
- 20 °C
- pH:
- >= 7.5 - <= 7.9
- Details on results:
- Preliminary Test
The content of test item (based on the response of the di-ester) dissolved in the water samples after 2 centrifugation steps ranged from 2.3 x 10-6 to 2.34 x 10-3 g/L. The centrifugation method was checked. The concentration analyzed decreased with each centrifugation step which may be due to adsorption on the wall of the centrifugation tube. To prevent this, it was decided to remove undissolved material in the samples from the main study by filtration.
Main Study
The results for the samples taken after stirring for 24, 48 and 72 hours at a loading rate of 0.1 and 1 g/L are given in Table 6 and Table 7, respectively. The concentration analyzed in the unfiltered sample at the loading rate of 0.1 g/L taken after 24 hours of stirring was 0.012 g/L. This concentration is much higher than the concentration after filtration and thus proved that there was undissolved test item in the solution.
At both loading rates, the maximum difference between the 24-, 48- and 72- hour stirred samples was > 15%. The concentrations analyzed in the triplicate samples from the second filtration step were comparable or lower than the concentrations analyzed in the triplicate samples from the first filtration step. Based on this, the water solubility of the test item was given as a range of all measurements after the first filtration step.
No test item was detected in the pretreated sample from the blank water mixture.
Applicant's summary and conclusion
- Conclusions:
- The flask method was applied for the determination of the water solubility of Amines,
N-tallow alkyltrimethylenedi-, C4-18-alkyl phosphates. The concentration of the test item in the aqueous solution was determined based on the response of the di-ester.
The water solubility of the test item at a loading rate of 0.1 g/L and 20°C was in the range of 3 x 10-4 to 5 x 10-4 g/L.
The water solubility of the test item at a loading rate of 1 g/L and 20°C was in the range of
6 x 10-4 to 1.2 x 10-3 g/L.
The pH of the aqueous samples was in the range of 7.5 – 7.9
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