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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
OECD 107

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
Type of method:
shake-flask method to: flask method
Partition coefficient type:
octanol-water

Test material

1
Chemical structure
Reference substance name:
disodium 2,4-dihydroxy-5-[(2-hydroxy-3-nitro-5-sulphonato-phenyl)azo]benzoate, reaction products with chromium triacetate
Molecular formula:
not applicable
IUPAC Name:
disodium 2,4-dihydroxy-5-[(2-hydroxy-3-nitro-5-sulphonato-phenyl)azo]benzoate, reaction products with chromium triacetate

Study design

Analytical method:
photometric method

Results and discussion

Partition coefficient
Key result
Type:
log Pow
Partition coefficient:
-3.77
Temp.:
23 °C
pH:
ca. 6
Remarks on result:
other: mean of 6 measurements

Any other information on results incl. tables

Table 1: Results

no.

stock solution [mL]

n-octanol [mL]

conc. in n-octanol phase [mg/L]

conc. in water phase [mg/L]

log pow

A1

5

10

0.14

756.1

- 3.75

A2

5

10

0.13

767.6

- 3.78

B1

10

10

0.14

760.0

- 3.75

B2

10

10

0.12

757.9

- 3.80

C1

20

10

0.13

749.7

- 3.77

C2

20

10

0.14

761.1

- 3.75

mean

-

-

-

-

- 3.77

Stock solution: 847 mg/L = 758.9 mg/L active substance

The recovery rate of the test substance was between 99 % and 101 %.

Applicant's summary and conclusion