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EC number: 308-760-8 | CAS number: 98246-87-8
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to aquatic invertebrates
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 4 - 6 July 1989
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: see 'Remark'
- Remarks:
- Guideline study, non GLP. Water solubility data indicate low solubility. Data are lacking wrt stability and vapour pressure. No actual concentrations were determined. Substance identity and composition data are insufficient. No positive control to confirm sensitivity of test/batch of daphnids. Due to the fact the substance was tested at maximum water solubility and no mortalities occurred, it is justified to conclude the substance will not affect daphnids.
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.2 (Acute Toxicity for Daphnia)
- GLP compliance:
- not specified
- Remarks:
- no quality control indication
- Specific details on test material used for the study:
- Substance: Basoplast 20 konz
Chargenumber: 212/89
Chemical name: stearyldiketen
Molecular formula: C36O2H69
Purity: 98.5%
Supplier: Basf Sokalan-Fab. Nord ESP/TN F 520
Water solubility: < 500 mg/L at 20 C - Analytical monitoring:
- no
- Vehicle:
- no
- Details on test solutions:
- The concentration in the stock solution was 500 mg/L, this stock was stirred for 17 hours at 20 C.
Dilutions of this stock were prepared with dilution water.
From every diluted stock solution, 10 mL was taken for the preparation of the test solutions.
Test solutions were prepared with artificial freshwater.
This water was prepared by using deionized water (conductivity < 0.05 uS/cm) to which minerals (elements and macronutrients) were added as indicated in the report.
Molar ratio Ca:Mg = 4 : 1
Molar ratio Na: K = 10 : 1
Conductivity: 600-700 uSiemens/cm
pH: 8.0 +/- 0.5
Test water was aerated with oil-free air to saturation after which it was left for stabilisation
- Test organisms (species):
- Daphnia magna
- Details on test organisms:
- Origin: Testculture was originally (1978) obtained from the Institut National de Recherche Chimique Apliquee, France, but since then maintained in the Basf laboratory of Umweltanalytik und Okologie, Ludwigshafen, Germany.
Animals were 2-24 hours old when used for the test.
Culture conditions:
Hardness: 2.70 +/- 0.5 mmol/L
Ks to pH 4.3: 0.90+/- 0.1 mmol/L
Oxygen conc: > 2 mg/L
Temp: 19-21 C
Feeding: daily fed green algae culture
Light-Darkness: 16 : 8h
Lightintensity: 5 micro-einstein/mxmxs at wavelengths 400-750 nm - Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 48 h
- Post exposure observation period:
- None
- Hardness:
- 2.76 +/- 0.5 mmol/L
- Test temperature:
- 19-21 C
- pH:
- 8.0-8.1
- Dissolved oxygen:
- 8.4-9.1 mg/L
- Nominal and measured concentrations:
- Nominal conc: 62.5 - 125 - 250 - 500 mg/L
- Details on test conditions:
- Test volume: 10 mL, which is 2 ml per animal
5 animals times 4 replicates per concentration level.
Observations were made at 0, 3, 6, 24 and 48 h
No data as to whether feeding was continued during the test. - Reference substance (positive control):
- not specified
- Duration:
- 48 h
- Dose descriptor:
- EC50
- Effect conc.:
- > 500 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mobility
- Remarks on result:
- other: at maximum water solubility the substance does not cause effects under the conditions of the test
- Duration:
- 48 h
- Dose descriptor:
- NOEC
- Effect conc.:
- >= 500 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Remarks on result:
- other: at maximum water solubility the substance does not cause effects under the conditions of the tes
- Details on results:
- No mortalities observed at any time point.
Authors indicate that the product is not water soluble or can be homogenously distributed by an emulgator.
In the test, some deposits were noted as well as swirling material. - Reported statistics and error estimates:
- No data.
- Validity criteria fulfilled:
- not specified
- Conclusions:
- Study in principle according to guideline, some data are lacking, incl full composition. Stability, vapour pressure and actual concentrations are missing. Due to the fact the substance was tested at maximum water solubility and no mortalities occurred, it is justified to conclude the substance will not affect daphnids. Based on nominal concentrations the conclusion is correct, but could be re-phrased into "at maximum water solubility the substance does not cause mortality under the conditions of the test".
- Executive summary:
In this study, test substance Basoplast 20 konz. was tested for its toxicity to the waterflea, Daphnia magna in a static system after 48 h exposure. The study was carried out according to EU guideline C2 of Annex V to 79/831/EEC with 4 times 5 animals per concentration level. Nominal concentrations were 0 - 62.5 - 125 - 250 - 500 mg/L. No mortalities were noted during the study in which presumed undissolved material was observed in the test solutions containing the test substance. The EC50 was therefore concluded at > 500 mg/L and the NOEC was determined at 500 mg/L both based on nominal concentrations.
Reference
Description of key information
Key study is BASF Aktiengesellschaft (1989). Study performed according to EWG 79/831/C.2 with Daphnia magna, 48h. Non GLP. Conclusion regarding EC50 reliable. EC50 > 500 mg/L, based on nominal concentration, however should be concluded at maximum water solubility. Several restrictions as to the study.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Dose descriptor:
- EC50
- Effect concentration:
- 500 mg/L
Additional information
Due to the fact the substance was tested at maximum water solubility and no mortalities occurred, it is justified to conclude the substance will not affect daphnids.
Water solubility data indicate low solubility. Data are lacking wrt stability and vapour pressure, no actual concentrations were determined. Substance identity and composition data are insufficient, no positive control to confirm sensitivity of test/batch of daphnids.
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