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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

Administrative data

Endpoint:
biodegradation in water and sediment: simulation tests
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
3 (not reliable)
Rationale for reliability incl. deficiencies:
other: No guideline study, endpoint of low relevance.

Data source

Reference
Reference Type:
publication
Title:
Preliminary characterization of four 2-chlorobenzoate-degrading anaerobic bacterial consortia
Author:
Sharak Genthner, B.
Year:
1999
Bibliographic source:
Biodegradation 10: 27-33, 1999

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Anaerobic transformation with 2-chlorobenzoate-degrading methanogenic consortia derived from freshwater sediment enrichments.
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
2-chlorobenzaldehyde
EC Number:
201-956-3
EC Name:
2-chlorobenzaldehyde
Cas Number:
89-98-5
Molecular formula:
C7H5ClO
IUPAC Name:
2-chlorobenzaldehyde

Study design

Inoculum or test system:
anaerobic bacteria
Duration of test (contact time):
<= 9 mo
Initial test substance concentration
Initial conc.:
100 µmol/L
Based on:
test mat.

Results and discussion

Transformation products:
yes
Identity of transformation products
No.:
#1
Reference
Reference substance name:
Unnamed
IUPAC name:
(2-chlorophenyl)methanol
Inventory number:
InventoryMultipleMappingImpl [inventoryEntryValue=EC 241-801-7]
CAS number:
17849-38-6

Any other information on results incl. tables

2-chlorobenzylalcohol was not observed to decline.

Applicant's summary and conclusion

Validity criteria
Validity criteria fulfilled:
not applicable
Conclusions:
Under anaerobic conditions with methanogenic bacterial consortia, reductive biotransformation of 2-chlorobenzaldehyde to 2-chlorobenzyl alcohol is observed.
Executive summary:

With the used methanogenic anaerobic bacterial consortia, only primary biodegradation of 2-chlorobenzaldehyde to 2-chlorobenzyl alcohol (reductive biotransformation) was observed. No degradation of 2-chlorobenzyl alcohol could be detected.