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Diss Factsheets

Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: well performed OECD study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report date:
2008

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Deviations:
not specified
GLP compliance:
no
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
4-amino-2,5-dimethoxy-N-methylbenzenesulphonamide
EC Number:
256-435-3
EC Name:
4-amino-2,5-dimethoxy-N-methylbenzenesulphonamide
Cas Number:
49701-24-8
Molecular formula:
C9H14N2O4S
IUPAC Name:
4-amino-2,5-dimethoxy-N-methylbenzene-1-sulfonamide

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficient
Type:
log Pow
Partition coefficient:
0.27
Temp.:
23 °C
pH:
ca. 4.5

Any other information on results incl. tables

Results in detail:

determ. no. stock solution [ml] water [ml] test substance conc. test substance conc. Log Pow

in n-octanol phase [mg/l] in water phase [mg/l]

A1 10 20 55,8 30,3 0,27

A2                     10                   20                   55,8                                         30,4                                  0,26

B1                     20                        20                   74,9                                         40,4                                  0,27

B2                     20                        20                   75,0                                         40,3                                  0,27

C1                    40                         20                   90,1                                         48,5                                  0,27

C2                    40                         20                   90,5                                         48,5                                  0,27

mean               ---                        ---                    ---                                          ---                                     0,27

Recovery rate of test substance:: 100 - 102%

HPLC conditions:

Column : Synergi Hydro RP, 250 mm x 4,6 mm ID, 4 μm

Eluent A : acetonitrile/phosphoric acid 0,05 mol/l = 5/95

Eluent B : acetonitrile/ phosphoric acid 0,05 mol/l = 95/5

Applicant's summary and conclusion

Conclusions:
The Log Pow of the substance is 0.27 at 23°C..
Executive summary:

The Log Pow of the substance was determined according to OECD 107 (shake flask method). Analytics was performes by HPLC.

The Log Pow at 23°C was found to be 0.27.