Registration Dossier
Registration Dossier
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EC number: 228-771-0 | CAS number: 6358-37-8
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2009
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Valid method
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 009
- Report date:
- 2009
Materials and methods
- Principles of method if other than guideline:
- Determination of solubility in octanol and calculation of log Pow with water solubility reported in section 4.8
- Type of method:
- other: calculation
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- 2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(4-methylphenyl)-3-oxobutyramide]
- EC Number:
- 228-771-0
- EC Name:
- 2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(4-methylphenyl)-3-oxobutyramide]
- Cas Number:
- 6358-37-8
- Molecular formula:
- C34H30Cl2N6O4
- IUPAC Name:
- 2,2'-[(3,3'-dichlorobiphenyl-4,4'-diyl)didiazene-2,1-diyl]bis[N-(4-methylphenyl)-3-oxobutanamide]
Constituent 1
Study design
- Analytical method:
- photometric method
Results and discussion
Partition coefficientopen allclose all
- Type:
- Pow
- Partition coefficient:
- 13.85
- Temp.:
- 23 °C
- pH:
- ca. 7
- Type:
- log Pow
- Partition coefficient:
- 1.1
- Temp.:
- 23 °C
- pH:
- ca. 7
- Details on results:
- Pow and log Pow were calculated from equilibrium concentrations in octanol (see below) and in water (see section 4.8)
Any other information on results incl. tables
The solubility in octanol was determined to be 72 µg/L at ambient temperature (23-24°C). This figure represents the mean of 3 determinations (range: 72.2 -74 .8 µg/L, sigma = 1). The solubility in water was determined to be 5.2 µg/L (section 4.8). These solubilities (equilibrium concentrations considering the tests performed) are used to calculate Pow with the following equation: Pow = equilibrium concentration in octanol / equilibrium concentration in water
Pow = 72 µg/L / 5.2 µg/L
Pow = 13.85
log Pow = 1.1
Applicant's summary and conclusion
- Conclusions:
- The test item has a log Pow of 1.1.
- Executive summary:
The log Pow of the test substance was calculated from the equilibrium concentrations in water and in octanol. The log Pow at 23 -24 °C was 1.1.
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