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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2021

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
GLP compliance:
yes

Test material

1
Chemical structure
Reference substance name:
Hydrolysis product of chloro(dimethyl)octadecylsilane and silica gel
EC Number:
615-738-4
Cas Number:
72245-35-3
Molecular formula:
SiC20H43
IUPAC Name:
Hydrolysis product of chloro(dimethyl)octadecylsilane and silica gel

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
As the test item is a not soluble product under the test conditions, so the test item solutions were prepared by directly adding the test item in the test medium in each replicate.

Test solutions

Vehicle:
yes
Details on test solutions:
The test medium used was Elendt M4 in accordance with OECD 202. It was reconstituted with
chemical reagents and deionised water.

Test organisms

Test organisms (species):
Daphnia magna

Study design

Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
48 h

Test conditions

Hardness:
Between 140 and 250 mg.L-1 CaCO3
Test temperature:
20°C ± 2°C
pH:
Between 6 and 9
Nominal and measured concentrations:
100 mg/L
Reference substance (positive control):
yes
Remarks:
Potassium dichromate

Results and discussion

Effect concentrations
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat. (total fraction)
Basis for effect:
mobility
Results with reference substance (positive control):
24h EC50: 1.15 mg/L

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The 48h EC50 of the test item was > 100 mg/L, based on the nominal concentration.