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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

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:
secondary literature

Data source

Reference
Reference Type:
review article or handbook
Title:
Unnamed
Year:
2006

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
The conditions of the study were different from a standardised OECD test since the green algae were invcubated in poorly nutritious medium and the pre-cultures were not growing exponentially.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Silicon dioxide
EC Number:
231-545-4
EC Name:
Silicon dioxide
Cas Number:
7631-86-9
Molecular formula:
O2Si
IUPAC Name:
Silicon dioxide
Test material form:
solid
Specific details on test material used for the study:
SAS Aerosil A300

Test organisms

Test organisms (species):
Chlorella vulgaris
Details on test organisms:
green algae SA-3 strain (exsymbiotic from Paramecium bursaria) and Chlorella vulgaris c-27

Study design

Total exposure duration:
12 d

Test conditions

Nominal and measured concentrations:
0,01% SAS (100 mg/l)

Results and discussion

Effect concentrations
Key result
Duration:
12 d
Dose descriptor:
other: growth
Effect conc.:
ca. 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Remarks on result:
not determinable
Details on results:
No toxic effect on the growth of green algae SA-3 strain (exsymbiotic from Paramecium bursaria) and Chlorella vulgaris c-27 was reported after exposure to 0.01 % SAS Aerosil A300 (100 mg/L) for 9 to 12 days. The conditions of the study were different from a standardised OECD test since the green algae were invcubated in poorly nutritious medium and the pre-cultures were not growing exponentially. Newertheless, under the conditions of this study, Aerosil A300 appeared to stimulate the algal growth via an acceleration of their life cycle

Applicant's summary and conclusion

Conclusions:
No toxic effect on the growth of green algae SA-3 strain (exsymbiotic from Paramecium bursaria) and Chlorella vulgaris c-27 was reported after exposure to 0.01 % SAS Aerosil A300 (100 mg/L) for 9 to 12 days. The conditions of the study were different from a standardised OECD test since the green algae were invcubated in poorly nutritious medium and the pre-cultures were not growing exponentially. Newertheless, under the conditions of this study, Aerosil A300 appeared to stimulate the algal growth via an acceleration of their life cycle
Executive summary:

No toxic effect on the growth of green algae SA-3 strain (exsymbiotic from Paramecium bursaria) and Chlorella vulgaris c-27 was reported after exposure to 0.01 % SAS Aerosil A300 (100 mg/L) for 9 to 12 days. The conditions of the study were different from a standardised OECD test since the green algae were invcubated in poorly nutritious medium and the pre-cultures were not growing exponentially. Newertheless, under the conditions of this study, Aerosil A300 appeared to stimulate the algal growth via an acceleration of their life cycle.