Registration Dossier

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:
2018
Report date:
2018

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

Constituent 1
Chemical structure
Reference substance name:
Disodium 4-amino-3-[[4-[(2-amino-4-hydroxyphenyl)azo]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
EC Number:
270-629-5
EC Name:
Disodium 4-amino-3-[[4-[(2-amino-4-hydroxyphenyl)azo]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
Cas Number:
68460-07-1
Molecular formula:
C28H22N8O8S2.2Na
IUPAC Name:
disodium 4-amino-3-({4-[(2-amino-4-hydroxyphenyl)diazenyl]phenyl}diazenyl)-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonate
Constituent 2
Chemical structure
Reference substance name:
Disodium 4-amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
EC Number:
272-559-0
EC Name:
Disodium 4-amino-3-[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
Cas Number:
68877-33-8
Molecular formula:
C28H23N9O7S2.2Na
IUPAC Name:
disodium 4-amino-3-({4-[(2,4-diaminophenyl)diazenyl]phenyl}diazenyl)-5-hydroxy-6-(phenyldiazenyl)naphthalene-2,7-disulfonate

Study design

Analytical method:
high-performance liquid chromatography

Results and discussion

Partition coefficient
Key result
Type:
log Pow
Partition coefficient:
-2.44
Temp.:
23 °C
pH:
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

0.3030

461.5

- 2.48

A2

5

10

0.3249

418.3

- 2.41

B1

10

10

0.2718

460.2

- 2.53

B2

10

10

0.2188

452.9

- 2.62

C1

20

10

0.4442

454.0

- 2.31

C2

20

10

0.4508

451.8

- 2.30

mean

-

-

-

-

- 2.44

Stock solution: 813 mg/L = 539 mg/L active substance

The recovery rate of the test substance was between 89 % and 91%.

Applicant's summary and conclusion