Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 306-764-4 | CAS number: 97404-02-9
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Reported 25May1998
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 998
- Report date:
- 1998
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- GLP compliance:
- no
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- 2-[(4-aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride
- EC Number:
- 306-764-4
- EC Name:
- 2-[(4-aminophenyl)azo]-1,3-dimethyl-1H-imidazolium chloride
- Cas Number:
- 97404-02-9
- Molecular formula:
- C11H14N5.Cl
- IUPAC Name:
- 2-[(1E)-2-(4-aminophenyl)diazen-1-yl]-1,3-dimethyl-2,3-dihydro-1H-imidazol-1-ium chloride
- Test material form:
- solid: particulate/powder
- Details on test material:
- See individual study reports for purity information and CofA where applicable
Constituent 1
- Specific details on test material used for the study:
- MIP Orange 3100 (CGF-F020088/0010)
Study design
- Analytical method:
- high-performance liquid chromatography
Results and discussion
Partition coefficientopen allclose all
- Key result
- Type:
- Pow
- Partition coefficient:
- ca. 0.007
- Temp.:
- 20 °C
- pH:
- ca. 7
- Key result
- Type:
- log Pow
- Partition coefficient:
- ca. -2.13
- Temp.:
- 20 °C
- pH:
- ca. 7
Applicant's summary and conclusion
- Conclusions:
- Three portions of the test sample of about 25 mg each were mixed with about 30 ml of n-octanol each. The n-octanol is saturated with the test substance by mixing vigorously in an ultrasonic bath. The mixture is decanted, filtered through a Millipore filter and made up to 50 ml volume in a volumetric flask, using n-octanol.
10 ml portions of the solutions are mixed with water according to OECD method no. 107.
After partition, the content of test substance is determined in the aqueous and organic layer by ion pair HPLC using UV/VIS-detection. Each sample was analyzed twice.
The test item had the following results for the partition coefficient test Pow, = 0.0073; log Pow = -2.13 - Executive summary:
Three portions of the test sample of about 25 mg each were mixed with about 30 ml of n-octanol each. The n-octanol is saturated with the test substance by mixing vigorously in an ultrasonic bath. The mixture is decanted, filtered through a Millipore filter and made up to 50 ml volume in a volumetric flask, using n-octanol.
10 ml portions of the solutions are mixed with water according to OECD method no. 107.
After partition, the content of test substance is determined in the aqueous and organic layer by ion pair HPLC using UV/VIS-detection. Each sample was analyzed twice.
The test item had the following results for the partition coefficient test Pow, = 0.0073; log Pow = -2.13
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
