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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Partition coefficient

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
partition coefficient
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
2010-05-28
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Justification for type of information:
See section 13.2 for the read-across justification.
Reason / purpose for cross-reference:
read-across source
Qualifier:
according to guideline
Guideline:
OECD Guideline 123 (Partition Coefficient (1-Octanol / Water), Slow-Stirring Method)
Deviations:
yes
Remarks:
Some adjustments have been done. The concentration of the surfactant are below the CMC value, pH has been adjusted to 5-6
GLP compliance:
no
Type of method:
other: slow stir
Partition coefficient type:
octanol-water
Type:
log Pow
Partition coefficient:
3.6
Temp.:
25 °C
pH:
5 - 6

The measurements were made at a pH of 5-6 and at an initial concentration of 1.83 mg/L in the water phase (about 50% of the critical micelle

concentration (CMC) in water) and at 25°C. The partition coefficient value was determined from the weighed average of the concentrations of the main components in the product listed in the table below.

 

Substance

Log POW

Bis (2 -hydroxyethyl) hydrogenated tallow alkylamine

3.6

with the following results of its components:

Bis (2-hydroxyethyl) dodecyl amine

 

1.9

 

Bis (2-hydroxyethyl) tetradecyl amine

 

3.2

  

Bis (2-hydroxyethyl) hexadecyl amine

  

4.4

  

Bis (2-hydroxyethyl) octadecyl amine

  

3.8

Conclusions:
The partition coefficient of the registered substance is 3.6 (log Pow).
Executive summary:

The partition coefficient was determined to be 3.6 (log Pow) for 2,2'-(C16-18 (even numbered) alkyl imino) diethanol (PFAEO C16-18). Since the source substance is a substance with the same structure and a comparable alkyl chain length, these data are used as a worst case value for Octadecylbi(2-hydroxyethyl)amine (PFAEO C18).

Description of key information

The partition coefficient was determined to be 3.6 (log Pow) for 2,2'-(C16-18 (even numbered) alkyl imino) diethanol (PFAEO C16-18). Since the source substance is a substance with the same structure and a comparable alkyl chain length, these data are used as a worst case value for Octadecylbi(2-hydroxyethyl)amine (PFAEO C18).

Key value for chemical safety assessment

Log Kow (Log Pow):
3.8
at the temperature of:
25 °C

Additional information