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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Version / remarks:
2006
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
3-bromo-5-chlorophenol
EC Number:
611-435-6
Cas Number:
56962-04-0
Molecular formula:
C6H4BrClO
IUPAC Name:
3-bromo-5-chlorophenol

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
duplicate samples of all test concentrations and the control were taken at test start and after 72 hours

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)
Details on test organisms:
Desmodesmus subspicatus CHODAT, strain No. 86.81 SAG, supplied by "Sammlung von Algenkulturen, Pflanzenphysiologisches Institut der Universität Göttingen (Germany)"

Study design

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

Test conditions

Hardness:
0.24 mmol/L
Test temperature:
23 °C, with a maximum devation of +/- 2 °C
pH:
7.9 at test start
7.9 to 8.5 at test end
Nominal and measured concentrations:
10, 3.2, 1.0, 0.32 and 0.10 mg test item/L nominal
analytical measurements: 91 % of nominal concentration at test start, 83 % of nominal concentration after 72 hours

Results and discussion

Effect concentrations
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
7.14 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Remarks on result:
other: 5.65-9.65
Reported statistics and error estimates:
calculation of EC50 values and 95 % confidence limits by Probit analysis

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
GHS relevant (EC50 < 10 mg/L)