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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
3 (not reliable)

Data source

Reference
Reference Type:
review article or handbook
Title:
Partition coefficient n-octanol/water
Year:
1993
Bibliographic source:
Korenman Ya.I., Sukhanov P.T., Nekotorye zakonomernosti ekstrakcionnogo izvlečenia polizaměščennych naftalina, Zhurnal Prikladnoi Khimii, 66(8), p. 1767 - 1771 (1993)

Materials and methods

Principles of method if other than guideline:
Database entry.
Type of method:
other: no data
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
4-amino-5-hydroxynaphthalene-2,7-disulphonic acid
EC Number:
201-975-7
EC Name:
4-amino-5-hydroxynaphthalene-2,7-disulphonic acid
Cas Number:
90-20-0
Molecular formula:
C10H9NO7S2
IUPAC Name:
4-amino-5-hydroxynaphthalene-2,7-disulfonic acid
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Results and discussion

Partition coefficientopen allclose all
Type:
log Pow
Partition coefficient:
0.42
Temp.:
20 °C
pH:
5
Type:
log Pow
Partition coefficient:
0.13
Temp.:
20 °C
pH:
2

Applicant's summary and conclusion

Conclusions:
0.420 (log Kow = –0.378) (pH = 5)
0.130 (log Kow = –0.886) (pH = 2)