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EC number: 233-311-7 | CAS number: 10114-47-3
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:
- 2017
- 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)
- Version / remarks:
- Adopted 27 July 1995
- Deviations:
- yes
- Remarks:
- see Any other information on materials and methods
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- -2.68
- Temp.:
- 23 °C
- pH:
- 6.4
- Details on results:
- see Table No.: 1
- Conclusions:
- Partition coefficient (log P) of 1-octanol/waster of the test substance, Direct Yellow 28, determined by shake-flask method is: log Pow = -2.68 ± 0.04 (pH 6.4, 23°C).
- Executive summary:
The partition coefficient of the test substance, Direct Yellow 28, was determined. For determination of partition coefficient was used the shake-flask method. The test was performed according to the shake-flask method (OECD Test Guideline 107, Partition Coefficient (n-octanol/water): Shake Flask Method, Adopted 27 July 1995).
Partition coefficient (log P) of 1-octanol/waster of the test substance, Direct Yellow 28, determined by shake-flask method is: log Pow = -2.68 ± 0.04 (pH 6.4, 23°C).
Reference
Table No. 1: Results of determination of partition coefficient
Direct Yellow 28 in Stock solution | water / 1-octanol | water phase | 1-octanol phase | Pow | log Pow | ||
weight of sample | c (mg/L) | (mL/mL) | pH (23°C) | c (mg/L) | c (mg/L) | ||
20.95 mg (ZR1) | 91.73 | 30:30 | 6.6 | 90.30 | 0.18 | 0.0020 | -2.70 |
60:30 | 6.5 | 90.86 | 0.18 | 0.0020 | -2.70 | ||
30:60 | 6.3 | 89.83 | 0.19 | 0.0021 | -2.67 | ||
21.19 mg (ZR2) | 84.49 | 30:30 | 6.3 | 83.70 | 0.17 | 0.0021 | -2.68 |
60:30 | 6.4 | 83.45 | 0.18 | 0.0021 | -2.67 | ||
30:60 | 6.3 | 81.45 | 0.18 | 0.0022 | -2.65 | ||
Description of key information
Partition coefficient (log P) of 1-octanol/waster of the test substance, Direct Yellow 28, determined by shake-flask method is: log Pow = -2.68 ± 0.04 (pH 6.4, 23°C).
Key value for chemical safety assessment
- Log Kow (Log Pow):
- -2.68
- at the temperature of:
- 23 °C
Additional information
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