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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:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP complicance, not OECD guideline

Data source

Reference
Reference Type:
other: inquiry result from ECHA
Title:
Unnamed
Year:
2014

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: 92/69/EWG, C.3
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
426-480-5
EC Name:
-
Cas Number:
63562-33-4
Molecular formula:
C17H15O6P
IUPAC Name:
2-({9-oxo-8-oxa-9λ⁵-phosphatricyclo[8.4.0.0²,⁷]tetradeca-1(10),2,4,6,11,13-hexaen-9-yl}methyl)butanedioic acid

Test solutions

Details on test solutions:
Identity and concentration of auxiliary solvent for dispersal: none

Test organisms

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

Study design

Limit test:
no
Total exposure duration:
72 h

Test conditions

Hardness:
24 mg CaCO3/L

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
39 mg/L
Basis for effect:
biomass
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
ca. 54 mg/L
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
NOEC
Effect conc.:
45 mg/L
Basis for effect:
growth rate
Details on results:
%Concentration loss over test: 81 ... 51

Applicant's summary and conclusion