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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Administrative data

Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24.04.2013 - 10.05.2013
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: shake-flask method
Principles of method if other than guideline:
Determination of ratio of concentrations of a compound in the two phases of a mixture of Octanol-Water at equilibrium
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:
5-aminonaphthalene-2-sulphonic acid
EC Number:
204-351-2
EC Name:
5-aminonaphthalene-2-sulphonic acid
Cas Number:
119-79-9
Molecular formula:
C10H9NO3S
IUPAC Name:
5-aminonaphthalene-2-sulfonic acid
Test material form:
other: Amorphous
Details on test material:
- Name of test material: 5-aminonaphthalene-2-sulphonic acid
- Substance type: Organic
- Physical state: solid

Results and discussion

Partition coefficient
Type:
Pow
Partition coefficient:
0.91
Temp.:
39 °C
pH:
3.13
Remarks on result:
other: Log Pow = -0.04095
Details on results:
Converting the above Pow value into its Log value, the Log Pow of 5-aminonaphthalene-2-sulphonic acid is -0.04095 at temperature 39 deg C and pH of 3.13

Applicant's summary and conclusion

Conclusions:
The experimental value of octanol water partition co-efficient (log Pow) of of 5-aminonaphthalene-2-sulphonic acid by Shake flask method was found to be -0.04095 at temperature 39 deg C and pH of 3.13.This value indicates that 5-aminonaphthalene-2-sulphonic acid is hydrophilic in nature.
Executive summary:

The experimental value of octanol water partition co-efficient (log Pow) of of 5-aminonaphthalene-2-sulphonic acid by Shake flask method was found to be -0.04095 at temperature 39 deg C and pH of 3.13.This value indicates that 5-aminonaphthalene-2-sulphonic acid is hydrophilic in nature.