Registration Dossier
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EC number: 282-803-8 | CAS number: 84434-05-9
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:
- 12 Nov 2018 to 17 Dec 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.6 (Water Solubility)
- Version / remarks:
- March 04, 2016
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 105 (Water Solubility)
- Version / remarks:
- July 27, 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7840 (Water Solubility)
- Version / remarks:
- March 1998
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Specific details on test material used for the study:
- Appearance: Yellow powder
Purity/Composition: 98.25%
Test item storage: At room temperature protected from light desiccated - Key result
- Water solubility:
- 0.019 g/L
- Conc. based on:
- test mat.
- Remarks:
- Mean
- Temp.:
- 20 °C
- pH:
- > 4.5 - < 4.9
- Conclusions:
- The flask method was applied for the determination of the water solubility of CMTX 2-carboxymethyloxy-thioxanthone.
The water solubility of the test item at 20°C was 0.0186 g/L.
The pH of the aqueous samples was 4.5 and 4.9. - Executive summary:
In this guideline (OECD 105) study conducted with GLP certification, the test material (EC 282-803-8) was determined to have a water solubility of 0.0186 g/L at 20 °C.
Reference
Preliminary Test
The content of test item dissolved in the water sample was 0.0138 g/L.
Main Study
The results for the samples taken at 24, 48 and 72 hours are given in Table 6.
The maximum difference of the concentrations determined in the 24, 48 and 72 hour test samples was ≤ 15%. Based on this, the water solubility of the test item is given as the mean value of the analyzed concentrations.
A small response at the retention time of the test item was detected in the chromatogram of the pretreated sample from the blank water mixture. Since concentration was very small (i.e. 0.0000026 g/L) compared to the concentration in the water solubility samples containing test item, this was considered not impacting the study.
Table 6
Water Solubility of the Test Item
| Stirring time [hours] | Analyzed concentration [g/L] | Mean [g/L] | Maximum difference [%] | pH |
| 24 | 0.02 | 0.0186 | 15 | 4.9 |
| 48 | 0.0173 | 4.5 | ||
| 72 | 0.0186 | 4.5 |
Description of key information
Study conducted to recognised testing guidelines with GLP certification.
Key value for chemical safety assessment
- Water solubility:
- 0.019 g/L
- at the temperature of:
- 20 °C
Additional information
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