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Diss Factsheets
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EC number: - | CAS number: -
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_ecotoxicological-information.png)
Short-term toxicity to fish
Administrative data
- Endpoint:
- short-term toxicity to fish
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 30 September 2016 - 16 December 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 203 (Fish, Acute Toxicity Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
Constituent 1
- Specific details on test material used for the study:
- Sa 57
Sampling and analysis
- Analytical monitoring:
- yes
- Details on sampling:
- Water samples were taken (at least in duplicate) from each concentration during the definitive test at 0, 24, 48, 72 and 96 h. 50 mL collected water samples were extracted twice with 25 mL hexane. The combined organic phases were dried with rotary evaporator, and then redissolved with 2.00 mL acetonitrile. The final solutions were analyzed by UPLC.
Test solutions
- Vehicle:
- no
- Details on test solutions:
- In the range-finding test, the test solution was prepared by directly adding appropriate amounts of test substance into dilution water and then facilitating its dispersion by stirring for 30 min. The 1.00 mg/L test solution was colourless and clear. The test solutions with concentration of 10.0 and 100 mg/L showed white turbidity.
In the limit test, a W AF (water accommodated fraction) with a nominal concentration of 110 mg/L was prepared by adding an appropriate amount of the test substance to the test medium in glass aspirator bottles with appropriate size. The mixing aspirator bottle was stoppered and the aqueous test substance mixture was stirred by Teflon stir bar using a stirring rate about 500 rpm at room temperature (about 23°C ~ 25°C) for 24 hours. At the end of the 24 h, stirring was stopped and the test substance was allowed to settle down. The mixture was allowed to settle for 1 hour at room temperature. Then the aqueous portion removed through the outlet of the aspirator stirring bottle was the W AF of the test substance without further filtration to remove any remaining undissolved test substance.
Test organisms
- Test organisms (species):
- other: Gobiocypris rarus
- Details on test organisms:
- The test fish Rare minnow, Gobiocypris rarus (Batch No.: F20160830G), were bred by the test institute.
Fish to be used in the test were held for 7 days in water of the quality and temperature to be used in the test.
A photoperiod of 16 hours light, provided by overhead fluorescent tubes, and 8 hours dark was maintained. The water quality was same with the test water. The oxygen concentration was more than 80% of the air saturation value. And the temperature was controlled between 22.8°C and 23.2°C.
The fish were fed twice daily during the holding period on proprietary fish food. They were held without food for approximately 24 hours before being placed into the test vessels.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- yes
- Total exposure duration:
- 96 h
Test conditions
- Hardness:
- 166 mg (CaCO3)/L to 175 mg (CaCO3)/L
- Test temperature:
- 23.0°C to 23 .1°C
- pH:
- 7,3 - 7,84
- Dissolved oxygen:
- 74% and 95% of the air saturation
- Nominal and measured concentrations:
- nominal: 110 mg/L WAF
measured: 2.71 mg/L
The analytical results showed that the concentration of the test substance was consistent in the test medium throughout the 96-hour test period (deviation within 20%). Thus a static procedure was reasonable. - Details on test conditions:
- Static method was adopted in limit test. The concentration of 110 mg/L WAF was assigned in the limit test. One control group was also used in the test. Three replicates, each containing 3L of test solution, were assigned for each treatment group and control group, while the initial number of test fish was 7 for each replicate.
The test fish were randomly chosen and put in appropriate test solutions after the temperature had been adjusted to the required value. This was done within 30 min.
During the test, the following conditions were maintained:
-Light: 16 hours photoperiod daily;
-Temperature: 23.0°C to 23.1 °C;
-Oxygen concentration: 74% to 95% the air saturation; No aeration.
-Feeding: none.
At 24, 48, 72 and 96 h, the mortalities of the fish were recorded, and observations on individual behaviour were performed. Meanwhile, measurements of pH, dissolved oxygen and temperature were carried out and recorded daily.
Fish loading: 0.5 g to 0.6 g fish (wet weight) per litre of test medium. - Reference substance (positive control):
- yes
- Remarks:
- Reference substance: Potassium dichromate, K2Cr201, CAS: 7778-50-9; Purity: 99.8%; Lot number: LVC0052; J&K Scientific Ltd.
Results and discussion
Effect concentrations
- Key result
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- > 110 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- other: water accommodated fraction (WAF)
- Basis for effect:
- mortality (fish)
- Details on results:
- During the test period, all fish in the control groups and treated groups were alive and appeared
normal. - Results with reference substance (positive control):
- Reference substance: Potassium dichromate, K2Cr20 7, CAS: 7778-50-9; Purity: 99.8%; Lot number: L VC0052; J&K Scientific Ltd. The test with the reference substance is performed at least once with each batch of fish as a means of assuring that the laboratory test conditions are adequate and have not changed significantly. The resulting 24 h-LC50 should be in the range of200 mg/L to 400 mg/L. Otherwise, the test is regarded as invalid.
The recent results (Study No: S2016RI001-07) were LC50(24h) 325 mg/L (95% Confidence Limit 286~371 mg/L). - Reported statistics and error estimates:
- Trimmed Spearman-Karber Method (Version 1.5, USEPA) can be used to calculate the LC50 and 95% confidence limits. Due to its low toxicity to fish in this study, only the LC50 and 95% confidence limits of the reference substance was calculated by this method.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Conclusions:
- The results show that under valid static test conditions, the 96 h-LC50 of Sa57 to fish (Rare minnow, Gobiocypris rarus) is greater than the nominal concentration of the 110 mg/L WAF, while the maximum concentration causing no mortality (96h-LC0) was equal to the nominal concentration of 110 mg/L WAF.
96 h-LC50 > 110 mg/L WAF;
96 h-LC0 = 110 mg/L WAF. - Executive summary:
This test was designed to determine the acute toxicity of test substance (Sa57) to fish (Gobiocypris rarus). The test fish were exposed for 96 hours to the test solution. The study comprised at least one range-finding test followed by a Limit Test to determine the 96-hour median lethal concentration (LC50) of the test substance.
During the test period, all fish in the control groups and treated groups were alive and appeared normal.
The results show that under valid static test conditions, the 96 h-LC50 of Sa57 to fish (Rare minnow, Gobiocypris rarus) is greater than the nominal concentration of the 110 mg/L WAF, while the maximum concentration causing no mortality (96h-LC0) was equal to the nominal concentration of 110 mg/L WAF.
96 h-LC50 > 110 mg/L WAF;
96 h-LC0 = 110 mg/L WAF.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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