Registration Dossier
Registration Dossier
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EC number: 220-266-3 | CAS number: 2695-37-6
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2015/01/26 - 2015/01/27
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Reason / purpose for cross-reference:
- reference to other study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Deviations:
- yes
- Remarks:
- Just Preliminary test was conducted
- GLP compliance:
- no
- Type of method:
- shake-flask method to: flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- photometric method
- Key result
- Type:
- log Pow
- Partition coefficient:
- -3.44
- Temp.:
- 24 °C
- pH:
- 8.65
- Details on results:
- As preliminary test study for partition coefficient determination, solubility of this substance in water and n-octanol were measured.
The ratio of solubility in n-octanol to in water was -3.44 (logP). Because logP was smaller than 2, further test was not conducted. - Conclusions:
- The partition coefficient (n-octanol/water) of this substance is smaller than -2, -3.44. The further study was not conducted.
- Executive summary:
The solubilities of this substance in water and in n-octanol were measured as preliminary test for determination of partition coefficient between n-octanol and water. The result was -3.44 (logP), thus further test was not conducted.
Reference
Partition Coefficient (n-octanol/water) Determination
As the preliminary test for determination of partition coefficient (n-octanol/water), solubility of sodium p-styrenesulfonate in water and n-octanol were measured by flask method.
Results:
Solubility in Water
Run |
Date |
Solubility g/L |
1 |
January 21, 2015 |
203.2 |
2 |
January 22, 2015 |
191.8 |
3 |
January 23, 2015 |
191.0 |
Average: 195.3 g/L Standard derivation 6.8 g/L C.V. :3.5%
Solubility in Octanol
Run |
Date |
Solubility mg/L |
1 |
January 26, 2015 |
70.2 |
2 |
January 27, 2015 |
70.1 |
Average 70.2 mg/L
Partition Coefficient (n-Octanol/water)
P = 0.0702/195.3
= 3.94×10-4
LogPo/w = -3.44
Description of key information
The solubilities of this substance in water and in n-octanol were measured as preliminary test for determination of partition coefficient between n-octanol and water. The result was -3.44 (logP), thus further test was not conducted.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -3.44
- at the temperature of:
- 24 °C
Additional information
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