Registration Dossier
Registration Dossier
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EC number: 606-938-2 | CAS number: 2212-11-5
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
- Study period:
- From 2002-08-19 to 2003-02-04
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Good laboratory practice guideline study (OECD).
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 003
- Report date:
- 2003
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- (Chloromethyl)dimethoxymethylsilane
- EC Number:
- 606-938-2
- Cas Number:
- 2212-11-5
- Molecular formula:
- C4 H11 Cl O2 Si
- IUPAC Name:
- (Chloromethyl)dimethoxymethylsilane
- Details on test material:
- - Name of test material (as cited in study report): Silane 434100 VP
- Substance type: intermediate
- Physical state: liquid
- Stability under test conditions: pure: until expiry date December 31, 2003
in Water: hydrolysis in water
- Storage condition of test material: at room temperature in the dark
Constituent 1
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
not applicable
Sampling and analysis
- Analytical monitoring:
- yes
Test solutions
- Vehicle:
- no
Test organisms
- Test organisms (species):
- Daphnia magna
- Details on test organisms:
- TEST ORGANISM
- Common name: Daphnia magna (Straus), clone 5
- Source: supplied by Umweltbundesamt, Institut für Wasser-, Boden-, und Lufthygiene, Berlin, Germany in 1997
- Age at study initiation: < 21 hours old
- Method of breeding: same water quality as in test (pH, main ions, total hardness)
ACCLIMATION
- Acclimation period: 21 hours
- Acclimation conditions (same as test or not):same as test
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 48 h
- Post exposure observation period:
- not applicable
Test conditions
- Hardness:
- 2.5 mmol/l as CaCO3
- Test temperature:
- 21 °C
- pH:
- 7.7 to 8.0
- Dissolved oxygen:
- at least 7.8 mg/l
- Salinity:
- freshwater, not applicable
- Nominal and measured concentrations:
- 100 mg/l (nominal) measured: 98% of nominal
46 mg/l (nominal) measured: 101% of nominal
21 mg/l (nominal) measured: 104% of nominal
10 mg/l (nominal) measured: DOC- Details on test conditions:
- TEST SYSTEM
- Test vessel:
- Type (delete if not applicable): open
- Material, size, headspace, fill volume: glass beakers of 250 ml filled with 150 ml.
- No. of organisms per vessel: 10
- No. of vessels per concentration (replicates):2
- No. of vessels per control (replicates):2
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: deionized water
- Alkalinity: 0.8 mmol/l
- Ca/mg ratio: 4:1
OTHER TEST CONDITIONS
- Adjustment of pH: buffered solution
EFFECT PARAMETERS MEASURED (with observation intervals if applicable) : EC50 at 24 and 48 h- Reference substance (positive control):
- yes
- Remarks:
- potassium dichromate
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 24 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 100 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mobility
- Duration:
- 48 h
- Dose descriptor:
- EC50
- Effect conc.:
- 34.3 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mobility
- Remarks on result:
- other: 29.6 - 39.7
- Duration:
- 24 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 21 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mobility
- Duration:
- 48 h
- Dose descriptor:
- NOEC
- Effect conc.:
- 21 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mobility
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- Substance is harmful to daphnids.
- Executive summary:
Daphnia magna were exposed to hydrolysis products of nominal 4.6, 10, 21, 46 and 100 mg test item/L according to OECD guideline 202. The 48 -hour EC 50 was calculated to be 34.3 mg/L.
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