Registration Dossier
Registration Dossier
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EC number: 943-210-6 | CAS number: -
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:
- July 25,2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- shake-flask method to: flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- photometric method
- Type:
- log Pow
- Partition coefficient:
- ca. -2.019
- Temp.:
- 20 °C
- pH:
- ca. 3.58
- Type:
- Pow
- Partition coefficient:
- ca. 0.004
- Temp.:
- 20 °C
- pH:
- ca. 3.58
- Conclusions:
- log Pow = -2.6024Pow = 0.00398
- Executive summary:
Method
Partition coefficient was determined by means of shake flask method as per recommendations of OECD 107. Partition coefficient (P) is defined as the ratio of the equilibrium concentrations of a dissolved substance in a two-phase system consisting in two largely immiscible solvents.
Result
Study conducted at 20 °C and pH 3.58.
Pow = 0.00398
log Pow = -2.6024
Reference
At 96 hours values reached equilibrium, and so this value was considered for final calculations making duplicate determinations of every ratio o/w. Concentration of mother solution: W1 = 0.0422 g / 100 ml = 0.4220 g/l
| Ratio o/w | Water phase | n-octanol phase | Pow | log Pow | Average log Pow |
| c (g/l) | c (g/l) | ||||
| 70 / 30 | 0.4219 | 0.0002 | 0.0005 | -3.322131 | -3.3221 |
| 50 / 50 | 0.4194 | 0.0026 | 0.0062 | -2.210408 | -2.2104 |
| 30 / 70 | 0.4168 | 0.0022 | 0.0053 | -2.274671 | -2.2747 |
| pH of the test solution: | 3.58 | ||||
| Average Pow | 0.00398 | Average log Pow | -2.6024 | ||
| Std. dev. Pow | 0.00307 | Std. dev. log Pow | 0.62 | ||
Description of key information
log Pow = -2.6024 (Pow: 0.00398) at 20 °C and pH 3.58
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -2.602
- at the temperature of:
- 20 °C
Additional information
Shake Flask method - OECD 107
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