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EC number: 229-440-3 | CAS number: 6535-46-2
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- calculation (if not (Q)SAR)
- Remarks:
- Migrated phrase: estimated by calculation
- Adequacy of study:
- key study
- Study period:
- 2006
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: - Guidance on information requirements and chemical safety assessment (Chapter R.11.1.4.1: Assessment of substances requiring special considerations with regard to testing) - Valid method similar to Annex V, A.8, 1.6.1, 67/548/EEC
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:
- no guideline followed
- Principles of method if other than guideline:
- Measuring the solubility in water and in n-octanol (see below for details) seperately. Calculation of octanol-water partition coefficient from single values.
- Type of method:
- other: see below
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- 3-hydroxy-N-(o-tolyl)-4-[(2,4,5-trichlorophenyl)azo]naphthalene-2-carboxamide
- EC Number:
- 229-440-3
- EC Name:
- 3-hydroxy-N-(o-tolyl)-4-[(2,4,5-trichlorophenyl)azo]naphthalene-2-carboxamide
- Cas Number:
- 6535-46-2
- Molecular formula:
- C24H16Cl3N3O2
- IUPAC Name:
- 3-hydroxy-N-(2-methylphenyl)-4-[(2,4,5-trichlorophenyl)diazenyl]-2-naphthamide
- Test material form:
- solid: nanoform, no surface treatment
Constituent 1
Study design
- Analytical method:
- other: chromatography and UV-vis spectrometry
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- ca. 2.5
- Temp.:
- 24 °C
- pH:
- ca. 7
Any other information on results incl. tables
Solubility in water: 9.80 µg/L (sigma = 1.68) at 24 - 25°C
Solubility in octanol: 3.31 mg/L (sigma = 0.15) at 24 - 25°C
Applicant's summary and conclusion
- Executive summary:
The calculated log Pow of Pigment Red 112 is 2.5.
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