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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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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:
data from handbook or collection of data

Data source

Reference
Reference Type:
publication
Title:
BUA-Stoffbericht 81 - Ameisensäure, Formiate
Author:
n.a.
Year:
1992
Bibliographic source:
Beratergremium für Altstoffe (BUA) der Gesellschaft Deutscher Chemiker, S.Hirzel Wissenschaftliche Verlagsgesellschaft

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
ISO 8692 (Water Quality - Fresh Water Algal Growth Inhibition Test with Scenedesmus subspicatus and Selenastrum capricornutum)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Formic acid
EC Number:
200-579-1
EC Name:
Formic acid
Cas Number:
64-18-6
Molecular formula:
CH2O2
IUPAC Name:
formic acid
Constituent 2
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Water
Test material form:
liquid

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Study design

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

Test conditions

Reference substance (positive control):
not specified

Results and discussion

Effect concentrationsopen allclose all
Key result
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
ca. 26.9 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Key result
Duration:
96 h
Dose descriptor:
EC50
Effect conc.:
ca. 25 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate

Applicant's summary and conclusion

Conclusions:
The EC50 of formic acid in freshwater algae (Desmodesmus subspicatus) after 96 h is 25 mg/l.
Executive summary:

The EC50 of formic acid in freshwater algae (Desmodesmus subspicatus) after 96 h is 25 mg/l.

This value is taken from literature (BUA Stoffberticht No. 81).