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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Reliability:
1 (reliable without restriction)

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.8 (Partition Coefficient - HPLC Method)
GLP compliance:
no
Type of method:
HPLC method
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium 6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate
EC Number:
220-189-5
EC Name:
Sodium 6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate
Cas Number:
2657-00-3
Molecular formula:
C10H6N2O4S.Na
IUPAC Name:
sodium 6-diazo-5,6-dihydro-5-oxonaphthalene-1-sulphonate
Test material form:
solid

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficient
Type:
log Pow
Partition coefficient:
ca. -3.5
Temp.:
20 °C
pH:
ca. 4.2
Details on results:
Due to instability of the test item, the LogPow was calculated using the individual saturation solubilities of the test item in water (cs = 271 g/L at 20°C, pH 4.2) and n-octanol (93 mg/L).
The solubilities were determined according to the flask method.
The calculated log Pow using KOWWIN is -3.65.

Applicant's summary and conclusion

Conclusions:
The log Pow is approx. -3.5.