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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 201 (Freshwater Alga and Cyanobacteria, Growth Inhibition Test)
GLP compliance:
yes (incl. QA statement)

Test material

1
Chemical structure
Reference substance name:
Bis(2,4,5-trichloro-6-carbopentoxyphenyl) oxalate
EC Number:
250-195-3
EC Name:
Bis(2,4,5-trichloro-6-carbopentoxyphenyl) oxalate
Cas Number:
30431-54-0
Molecular formula:
C26H24Cl6O8
IUPAC Name:
pentyl 2,3,5-trichloro-6-[(2-oxo-2-{3,4,6-trichloro-2-[(pentyloxy)carbonyl]phenoxy}acetyl)oxy]benzoate

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
yes
Remarks:
OECD medium

Test organisms

Test organisms (species):
Raphidocelis subcapitata (previous names: Pseudokirchneriella subcapitata, Selenastrum capricornutum)

Study design

Test type:
static
Water media type:
freshwater
Total exposure duration:
72 h

Test conditions

Test temperature:
22.1-22.2
pH:
7.5-8.2
Nominal and measured concentrations:
0.01, 0.1, 1, 10 and 100 mg/L in range-finding test; 100 mg/L for definitive test.
Reference substance (positive control):
yes
Remarks:
potassium dichromate

Results and discussion

Effect concentrations
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Details on results:
the highest tested concentration (100 mg/L) did not cause algae growth inhibition to the test organisms.
Results with reference substance (positive control):
EyC50 72h = 0.7 mg/L

Applicant's summary and conclusion

Validity criteria fulfilled:
yes