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EC number: 291-833-0 | CAS number: 90480-94-7
Water solubility
Administrative data
- Endpoint:
- water solubility
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 12. April, 2018 - 16. April, 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
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
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7840 (Water Solubility)
- Deviations:
- no
- Principles of method if other than guideline:
- The solubility of the test item is below 0.01 g/L, so the column elution method should be applied according to the guideline. However, column elution method is not feasible with this test item, because coating of the support material is not possible due to the low solubility of the test item in any solvent. Therefore, the flask method was applied.
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
Test material
- Reference substance name:
- Phenol, 4-amino-, reaction products with 4-(2-naphthalenylamino)phenol and sodium sulfide (Na2(Sx))
- EC Number:
- 291-833-0
- EC Name:
- Phenol, 4-amino-, reaction products with 4-(2-naphthalenylamino)phenol and sodium sulfide (Na2(Sx))
- Cas Number:
- 90480-94-7
- Molecular formula:
- not applicable
- IUPAC Name:
- Reaction product of 4-aminophenol with 4-(2-naphthalenylamino)phenol and sodium polysulfide
- Test material form:
- solid
- Details on test material:
- Test item: Leuco Sulphur Black 11
Appearance: black solid
CAS No: 90480-94-7
EC No: 291-833-0
Constituent 1
Results and discussion
Water solubility
- Key result
- Water solubility:
- 1.5 mg/L
- Conc. based on:
- act. ingr.
- Incubation duration:
- >= 24 - <= 72 h
- Temp.:
- 20 °C
- pH:
- >= 6.81 - <= 6.91
Any other information on results incl. tables
Results of the determination of the test item concentrations
| Sampling time | Measured concentration of the test item [mg/L] | Measured pH | |
| Test vessels | Mean with the 95% confidence intervals | ||
| After 24 hours | 1.41 1.50 1.49 |
1.46 ± 0.13 | 6.84 6.82 6.86 |
| After 48 hours | 1.45 1.45 1.48 |
1.46 ± 0.04 | 6.86 6.91 6.88 |
| After 72 hours | 1.57 1.53 1.54 |
1.55 ± 0.05 | 6.82 6.81 6.81 |
| Solubility of the test item (mg/L) | 1.49 ± 0.13 | - | |
| RSD% | 3 | - | |
| Ultra-pure water | < LOQ | 7.6 -7.7 | |
Applicant's summary and conclusion
- Conclusions:
- The water solubility was determined to be 1.5 ± 0.13 mg/L (95% confidence interval) at 20 °C ± 1 °C using the shake-flask method. ..
- Executive summary:
In the course of this study the water solubility of the test item was determined at 20 ± 1 °C using the shake-flask method for the performance of the test. The water solubility was determined to be 1.5 ± 0.13 mg/L (95% confidence interval).
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