Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water: screening tests

Currently viewing:

Administrative data

Link to relevant study record(s)

biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
no guideline followed
Principles of method if other than guideline:
CO2 evolution test
GLP compliance:
not specified
Oxygen conditions:
Inoculum or test system:
other: Mixed liquor activated sludge (secondary effluent)
Duration of test (contact time):
ca. 5 d
Initial conc.:
ca. 0.6 mg/L
Based on:
test mat.
Initial conc.:
ca. 5.7 mg/L
Parameter followed for biodegradation estimation:
CO2 evolution
Key result
% degradation (test mat. analysis)
ca. 10 000
Sampling time:
5 d
Validity criteria fulfilled:
Interpretation of results:
readily biodegradable
Rapidly biodegradable according to GHS.

Description of key information

Readily biodegradable of triethanolamine based on CO2 evolution method.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Biodegradation test was conducted on the target substance following OECD guideline 301D Closed bottle method. The results indicated not readily biodegradable under the test conditions. However, it was not reported whether a toxicity control was conducted and how the initial concentration 3.g mg/l was determined. Further work may needed to investigate the biodegradability of the target substance.


As the target substance hydrolyzes rapidly, the intrinsic properties lies in the hydrolysis products. The triethanolamine degraded 100% after 5 days in a CO2 evolution method (West 1996).


The inorganic product, Zirconium dioxide, was not considered further in this report as biodegradation and partition coefficient assessments did not apply.


Based on these findings, the target substance was considered readily biodegradable.