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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
biodegradation in water: simulation testing on ultimate degradation in surface water
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Study period:
March to April 2003
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This robust summary has a reliability rating of 1 because the study followed a standard guideline, followed GLP guidelines, and was conducted without deviations that would invalidate the study.
Reason / purpose for cross-reference:
read-across: supporting information
Qualifier:
according to guideline
Guideline:
OECD Guideline 306 (Biodegradability in Seawater)
Deviations:
no
GLP compliance:
yes
Radiolabelling:
no
Oxygen conditions:
aerobic
Inoculum or test system:
other: Natural seawater
Details on source and properties of surface water:
Seawater was collected from the Burnham-on-Crouch estuary at high tide. The estuary has no industrial input.
Details on inoculum:
Indigenous microorganisms contined in natural seawater.
Duration of test (contact time):
28 d
Initial conc.:
1.21 mg/L
Based on:
test mat.
Parameter followed for biodegradation estimation:
O2 consumption
Details on study design:
A surfactant (Nonidet P40) was used to emulsify the test substance. Background BOD for the surfactant was determined by evaluating the BOD of the surfactant alone in parallel test systems.
Reference substance:
acetic acid, sodium salt
% Degr.:
0
Parameter:
O2 consumption
Sampling time:
7 d
% Degr.:
5
Parameter:
O2 consumption
Sampling time:
14 d
% Degr.:
4
Parameter:
O2 consumption
Sampling time:
21 d
Key result
% Degr.:
11
Parameter:
O2 consumption
Sampling time:
28 d
Transformation products:
not measured
Evaporation of parent compound:
not measured
Volatile metabolites:
not measured
Residues:
not measured
Validity criteria fulfilled:
yes
Conclusions:
The test substance biodegraded to an extent of 11% after 28 days.
Executive summary:

The test substance biodegraded to an extent of 11% after 28 days.

Endpoint:
biodegradation in water: sediment simulation testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is readily biodegradable
Transformation products:
not measured

Description of key information

There is no data available for this substance. However, key data is available for a structural analogue, Hyd C12-C14, isoalkanes, <2% arom, and presented in the dossier. The data is read across to this substance based on analogue read across and a discussion and report on the read across strategy is provided as an attachment in IUCLID Section 13.

Biodegradation in seawater:

One study on Hyd C12-C14, isoalkanes, <2% arom conducted according to OECD 306 guideline was available and it concluded to the ready biodegradability of the substance in seawater according to OECD criteria for biodegradability in seawater. Hyd C12-C14, isoalkanes, <2% arom biodegraded to an extent of 11% after 28 days in seawater. the substance was therefore concluded to be not inherently biodegradable.

Biodegradation in sediment:

This substance is considered readily biodegradable. Therefore, in accordance with REACH Annex IX column 2 exemption, the simulation testing in sediment does not need to be conducted

Key value for chemical safety assessment

Additional information