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EC number: 240-385-4 | CAS number: 16294-75-0
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2006
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer); method similar to Annex V, A.8, 1.6.1, Directive 67/548/EEC
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 006
- Report date:
- 2006
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Principles of method if other than guideline:
- Based on the determined solubilities in water and in n-octanol the partition coefficient was estimated (chapter 1.6.1, A.8). Instead of saturated solvent
systems pure solvents were used. - Type of method:
- other: calculation from individual solubilities
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- 14H-anthra[2,1,9-mna]thioxanthen-14-one
- EC Number:
- 240-385-4
- EC Name:
- 14H-anthra[2,1,9-mna]thioxanthen-14-one
- Cas Number:
- 16294-75-0
- Molecular formula:
- C23H12OS
- IUPAC Name:
- 8-thiahexacyclo[10.10.2.0²,⁷.0⁹,²³.0¹³,¹⁸.0²⁰,²⁴]tetracosa-1(23),2,4,6,9,11,13,15,17,20(24),21-undecaen-19-one
Constituent 1
Results and discussion
Partition coefficientopen allclose all
- Type:
- log Pow
- Partition coefficient:
- 3.6
- Temp.:
- 24 °C
- pH:
- ca. 7
- Type:
- Pow
- Partition coefficient:
- 4 343
- Temp.:
- 24 °C
- pH:
- ca. 7
Any other information on results incl. tables
Solubility of Solvent Orange 63 in n-octanol: 15.2 mg/l
Water solubility of Solvent Orange 63 : 3.5 µg/l
Pow SO63 = 4343
log Pow SO63 = 3.6
Applicant's summary and conclusion
- Conclusions:
- The Log Pow of the substance is 3.6 at 24°C (ambient temperature)
- Executive summary:
The partition coefficient n-octanol/water was calculated from the individual solubilities of the substance in each of these solvents.
The analytical method for the determination is in agreement with the method that was agreed upon at the “Analytical Experts Meeting” of ETAD (Basel) on January 12, 2005.
The water solubility (chapter 4.8) was determined as 3.5 µg/L and the n-octanol solubility (chapter 4.9) as 15.2 mg/L (24°C, ambient temperature).
Out of these results the Log Pow can be calculated as 3.6
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