Registration Dossier
Registration Dossier
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EC number: 226-939-8 | CAS number: 5567-15-7
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Remarks:
- Test procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer)
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ETAD Analytical Expert Group
- Version / remarks:
- method for substances with very low solubilty in both water and n-octanol
- Principles of method if other than guideline:
- calculation of log Pow with water solubility reported in section 4.8 and solubility in n-octanol reported in setion 4.9
- Type of method:
- estimation method (solubility ratio)
- 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-chloro-2,5-dimethoxyphenyl)-3-oxobutyramide]
- EC Number:
- 226-939-8
- EC Name:
- 2,2'-[(3,3'-dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[N-(4-chloro-2,5-dimethoxyphenyl)-3-oxobutyramide]
- Cas Number:
- 5567-15-7
- Molecular formula:
- C36H32Cl4N6O8
- IUPAC Name:
- 2,2'-[(3,3'-dichlorobiphenyl-4,4'-diyl)didiazene-2,1-diyl]bis[N-(4-chloro-2,5-dimethoxyphenyl)-3-oxobutanamide]
- Test material form:
- solid: bulk
Constituent 1
Study design
- Analytical method:
- photometric method
Results and discussion
Partition coefficientopen allclose all
- Type:
- Pow
- Partition coefficient:
- 1
- Temp.:
- 24 °C
- pH:
- ca. 7
- Type:
- log Pow
- Partition coefficient:
- 0.02
- Temp.:
- 24 °C
- pH:
- ca. 7
- Details on results:
- Pow and log Pow were calculated from equilibrium concentrations in n-octanol (see below) and in water (see section 4.8)
Any other information on results incl. tables
The solubility in n-octanol was 8.5 µg/L at 24-25°C. This figure represents the mean of 5 determinations (range: 5.9 -11.59 µg/L, sigma = 2.19). The solubility in water was 8.1 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 = 8.5 µg/L / 8.1 µg/L
Pow = 1.0
log Pow = 0.02
Applicant's summary and conclusion
- Conclusions:
- The test substance has a log Pow of 0.02.
- Executive summary:
The log Pow of the test substance was calculated from the equilibrium concentrations in water and in n-octanol. The log Pow at 24 °C (24 -25 °C for octanol, 23 -24 °C for water) was 0.02.
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