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EC number: 249-955-7 | CAS number: 29920-31-8
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2011
- 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)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: ETAD Analytical exptert group
- Version / remarks:
- method for substances with very low solubility in both, water and n-octanol
- Principles of method if other than guideline:
- Calculation of log Pow from solubility in n-octanol (see section 4.9) and in water (see section 4.8).
- Type of method:
- estimation method (solubility ratio)
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- Dimethyl 5-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azoterephthalate
- EC Number:
- 249-955-7
- EC Name:
- Dimethyl 5-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl]-2-oxopropyl]azoterephthalate
- Cas Number:
- 29920-31-8
- Molecular formula:
- C21H19N5O7
- IUPAC Name:
- dimethyl 5-({2-oxo-1-[(2-oxo-2,3-dihydro-1H-benzimidazol-5-yl)carbamoyl]propyl}diazenyl)isophthalate
Constituent 1
Study design
- Analytical method:
- photometric method
Results and discussion
Partition coefficientopen allclose all
- Type:
- Pow
- Partition coefficient:
- 1.26
- Temp.:
- 22 °C
- pH:
- ca. 7
- Type:
- log Pow
- Partition coefficient:
- 0.1
- Temp.:
- 22 °C
- pH:
- ca. 7
Any other information on results incl. tables
The n-octanol and the water solubility were both determined at 22 -23 °C and with the same test substance.
Calculation:
log Kow = logP = log (c(n-octanol)/c(water))
(c: individual solubilities; see below).
n-octanol sollubility: 240 µg/L
water solubility: 190 µg/L
pow: 1.26
log pow: 0.10
Applicant's summary and conclusion
- Conclusions:
- The calculated log Pow of the test substance is 0.10.
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