Registration Dossier

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
Study period:
1997
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
Rapporteur for the EU risk assessment of (3-chloro-2-hydroxypropyl)trimethylammonium chloride is the National Product Control Agency for Welfare and Health, Finland. The report is the result of in-depth work performed by experts in one Member State, working with counterparts in other Member States, Industry and public interest groups. The information reported is considered reliable.

Data source

Reference
Reference Type:
other: Published secondary source
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 201 (Alga, Growth Inhibition Test)
Deviations:
yes
Remarks:
In the algal medium the conc of NaHCO3 was twice that indicated in the guideline and the quantification of the test substance was performed using DOC/TOC determination method
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Sampling and analysis

Analytical monitoring:
not specified

Test solutions

Vehicle:
yes

Test organisms

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

Study design

Test type:
not specified
Water media type:
not specified
Total exposure duration:
72 h

Test conditions

Reference substance (positive control):
not specified

Results and discussion

Effect concentrationsopen allclose all
Duration:
72 h
Dose descriptor:
EC50
Effect conc.:
> 10 000 mg/L
Nominal / measured:
not specified
Conc. based on:
not specified
Basis for effect:
growth rate
Duration:
72 h
Dose descriptor:
EC10
Effect conc.:
3 200 mg/L
Nominal / measured:
not specified
Conc. based on:
not specified
Basis for effect:
growth rate

Applicant's summary and conclusion

Conclusions:
The toxicity of (3-chloro-2-hydroxypropyl)trimethylammonium chloride to algae was determined according to OECD guideline 201. EC50 and EC10 values based on algae growth rate were >10000 mg/L and 3200 mg/L. It is not clear from the test report if the results are presented as pure substance since according to the test report the degree of purity was 69.4%.