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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Endpoint:
activated sludge respiration inhibition testing
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study with acceptable restrictions

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2004
Report date:
2004
Reference Type:
secondary source
Title:
1,4-Dichlorobut-2-ene - CAS No: 764-41-0
Author:
OECD SIDS
Year:
2006
Bibliographic source:
SIDS Initial Assessment Report for 22th SIAM, UNEP Publications

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.11 (Biodegradation: Activated Sludge Respiration Inhibition Test)
Principles of method if other than guideline:
EU Method C.11 is in most parts identical with OECD TG 209
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
Automatically generated during migration to IUCLID 6, no data available
IUPAC Name:
Automatically generated during migration to IUCLID 6, no data available
Details on test material:
IUCLID4 Test substance: other TS: 1,4-Dichlorobut-2-ene, purity 96.1 % (31.9 % cis- and 64.2 % trans-isomer)

Sampling and analysis

Analytical monitoring:
no

Test organisms

Test organisms (species):
activated sludge of a predominantly domestic sewage

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
3 h

Test conditions

Details on test conditions:
Type: aquatic

Results and discussion

Effect concentrations
Duration:
3 h
Dose descriptor:
EC50
Effect conc.:
573 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
inhibition of total respiration
Remarks:
respiration rate

Any other information on results incl. tables

RS-Freetext:
1,4-Dichlorobut-2-ene showed 95.6 % respiration inhibition of activated  sludge at a test substance concentration of 10000 mg/l.
The test substance and reference substance concentrations are not  confirmed by analytical methods. They are based on nominal concentrations

Applicant's summary and conclusion