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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Remarks:
Test procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer)

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2008
Report date:
2008
Reference Type:
study report
Title:
Unnamed
Year:
2005
Report date:
2005

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: ETAD Analytical expert group
Version / remarks:
method for substances with very low solubility in both, water and n-octanol
Principles of method if other than guideline:
Calculation of log Pow from solubility in water and in n-octanol (see section 4.9) and water (see section 4.8).
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water

Test material

Constituent 1
Chemical structure
Reference substance name:
2,2'-[ethylenebis(oxyphenyl-2,1-eneazo)]bis[N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxobutyramide
EC Number:
278-770-4
EC Name:
2,2'-[ethylenebis(oxyphenyl-2,1-eneazo)]bis[N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxobutyramide
Cas Number:
77804-81-0
Molecular formula:
C36H32N10O8
IUPAC Name:
2,2'-[Ethylenebis(oxyphenyl-2,1-eneazo)]bis[N-(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)-3-oxobutyramide
Test material form:
solid: nanoform

Study design

Analytical method:
photometric method

Results and discussion

Partition coefficientopen allclose all
Type:
Pow
Partition coefficient:
1.09
Temp.:
25 °C
pH:
ca. 7
Type:
log Pow
Partition coefficient:
0.04
Temp.:
25 °C
pH:
ca. 7

Any other information on results incl. tables

The water solubility was determined at 23 -24 °C

The n-octanol solubility was determined at 25 -27 °C.

Calculation:

log Kow = logP = log (c(n-octanol)/c(water))

(c: individual solubilities; see below).

water solubility: 17.0 µg/L

n-octanol solubility: 18.5 µg/l

pow: 1.09

log pow: 0.04

Applicant's summary and conclusion

Conclusions:
The calculated log Pow of the test substance is 0.04.