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EC number: 431-540-9 | CAS number: 170573-32-7
- 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
Link to relevant study record(s)
- Endpoint:
- short-term toxicity to fish
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From June 14, 1999 to July 06, 1999
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 203 (Fish, Acute Toxicity Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.1 (Acute Toxicity for Fish)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Analytical monitoring:
- yes
- Remarks:
- HPLC and UV/VIS-detection
- Details on sampling:
- Analytical report 726120 (Schreitmijller, 1999)
For the analyses of the test substance concentrations in this semi-static test with a test medium renewal every day, a sample was taken from the freshly prepared stock solution, and duplicate samples from the freshly prepared test media of all concentrations and the control at the start of the test (Day 0) and at the last test media preparation on Day 3. To confirm the maintenance of the test substance concentrations during the test medium renewal periods of one day, additional samples were taken in duplicate out of all test media and the control after one day at the end of the first test medium renewal period and at the end of the last test medium renewal (after 96 hours). All samples were taken from the approximate center of the aquaria without mixing of the test media.
Since in a pre-experiment the concentration of the test substance had slightly decreased after storage at -20 “C, acetonitrile was added immediately after sampling to stabilize the test substance during storage. The samples were then deep frozen (at about -20 “C).
The concentrations of the test substance were analyzed in the stock solution sample and in all duplicate test medium samples from the nominal test concentrations of 22 to 100 mg/L. The test medium samples from the test concentrations of 4.6 and 10 mg/L were not analyzed, because at these test concentrations no biological effects were observed, and thus it was clearly below the 96-hour NOEC. From the control only one of the duplicate samples was analyzed from each sampling date. - Vehicle:
- no
- Details on test solutions:
- A concentrated stock solution of nominal 1.5 g/L was freshly prepared prior to the test start or each test medium renewal. Therefore, an aliquot of the test substance was warmed up by means of a waterbath to about 40“C for 5 minutes to increase the fluidity and to improve the spreading properties. The amount of 2.996 - 3.017 g of the test substance was dispersed homogeneously in 2 I test water by ultrasonic treatment for 30 minutes and stirring for 30 minutes at room temperature. Adequate volumes of this intensively stirred stock solution were added to the test water in the aquaria and afterwards the test media were intensively mixed.
Additionally a control was tested in parallel (test water without addition of the test substance). - Test organisms (species):
- Oncorhynchus mykiss (previous name: Salmo gairdneri)
- Details on test organisms:
- Source: P. Hohler, trout breeding station Zeiningen, CH-4314 Zeiningen, Switzerland.
Acclimatization: at least one week prior to the test
Water temperature: 14 - 15 “C
Light conditions: a 16-hour light to 8-hour darkness photoperiod
Diet (prior test): HOKOVIT 502
Number: 10 fish
Mean body length at the start of the test: 5.1 +/- 0.4 cm
Mean body wet weight: 1.3 +/- 0.2 g - Test type:
- semi-static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 96 h
- Hardness:
- 2.5 mmol/L (= 250 mg/L) as CaC03
- Test temperature:
- 14-15°C
- pH:
- 7.7-8.1
- Dissolved oxygen:
- 8.8 mg/L or higher (higher than 60% oxygen saturation)
- Nominal and measured concentrations:
- 4.6, 10, 22, 46 and 100 mg/L (nominal)
- Details on test conditions:
- Test water: reconstituted water: in deionized water
- Reference substance (positive control):
- no
- Key result
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- ca. 75 mg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- other: mortality and symptoms
- Remarks on result:
- other: 100 mg/L nominal
- Key result
- Duration:
- 96 h
- Dose descriptor:
- NOEC
- Effect conc.:
- ca. 14 mg/L
- Nominal / measured:
- meas. (geom. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- other: mortality and symptoms
- Remarks on result:
- other: 22 mg/L nominal
- Details on results:
- - The two lowest test concentrations of nominal 4.6 and 10 mg/L were not analyzed since they were below the 96 h NOEC. In the freshly prepared test media of the test substance concentrations of nominal 22, 46, and 100 mg/L the measured mean test substance concentrations ranged from 88 to 96% of the nominal values. After the 24 h test medium renewal period the test substance concentrations had decreased to 30 - 76% of the nominal values. These losses were obviously caused by a separation of the dispersed test substance at the test medium surfaces, and/or adsorption to the glass surfaces. These analytical results reflect the observations during the test that a part of the test substance had separated to the surface of the test medium after 24 h. The total mean measured test concentrations (calculated as the average over all
measurements per test concentration) varied in the range of 64 to 75% of the nominal values. Therefore, the reported biological results were related to the total mean measured test substance concentrations. These were 14 mg/L (22 mg/L nominal), 34 mg/L (46 mg/L nominal), and 75 mg/L (100 mg/L nominal).
- 96 h LC50: about 75 mg/L
- 96 h LC0: 34 mglL
- 96 h LC100: > 75 mg/L
- 96 h NOEC: 14 mg/L
- 96 h LOEC: 34 mg/L
The EC50 should be taken with caution because the mortality was lower than 50% up to the highest concentration tested. The EC50 was calculated by linear extrapolation between the log concentration and the percent mortality.
- In the control and at the test concentrations up to and including 14 mg/L (22 mg/L nominal) all fish survived until the end of the test and no symptoms of intoxication were observed. At the next higher test concentration of 34 mg/L (nominal 46 mg/L) all test fish showed one or several intoxication symptoms at the observation after the test termination. At the highest test concentration of 75 mg/L (100 mg/L nominal) three of the seven fish had died until the end of the test. All four surviving fish showed heavy intoxication symptoms: the fish lay on the side or back on the bottom of the aquarium and only gill movement was visible after 96 h. Thus, the 96 h NOEC of the test substance to rainbow trout amounted to 14 mg/L. The 96 h LOEC and the LC0 were determined to be 34 mg/L. The 96 h LC50 was calculated to be 75 mg/L by linear extrapolation between the log-concentration and the percent mortality. But this value should be taken with caution because the mortality was lower than 50% up to the highest concentration tested. The 96 h LC100 could not be determined since the mortality was lower than 50% up to and including nominal 100 mg/L, but were higher than 75 mg/L (100 mg/L nominal). However, according to the guidelines no concentrations were tested in excess of nominal 100 mg/L. - Sublethal observations / clinical signs:
None.
- Validity criteria fulfilled:
- yes
- Conclusions:
- Under the study conditions, the 96 h LC50 and NOEC of the test substance in Rainbow trout were determined to be 75 and 14 mg/L (measured), respectively.
- Executive summary:
A study was conducted to determine the short-term toxicity of the test substance, IsoC18 MIPA (94.1% active), to fish according to OECD Guideline 203 and EU Method C.1, in compliance with GLP. Rainbow trout (Oncorhynchus mykiss) were exposed to the test substance (dispersed in test medium by ultrasonication and stirring) at nominal concentrations of 0, 4.6, 10, 22, 46 and 100 mg/L for 96 h under semi-static conditions. Samples for analytical confirmation were taken from the freshly prepared solutions at the start of the test and after 96 h. Mortality and other effects were observed at 3, 24, 48, 72 and 96 h following the start of exposure. Analysis of the samples showed that measured mean concentrations ranged from 88 to 96% of the nominal values. After the 24 h test medium renewal period the test substance concentrations had decreased to 30 - 76% of the nominal values. These losses were obviously caused by a separation of the dispersed test substance at the test medium surfaces and/or adsorption to the glass surfaces. These analytical results reflect the observations during the test that a part of the test substance had separated to the surface of the test medium after 24 h. The total mean measured test concentrations (calculated as the average of all measurements per test concentration) varied in the range of 64 to 75% of the nominal values. Therefore, the reported biological values were related to the total mean measured test substance concentrations (i.e. 14, 34 and 75 mg/L). In the control and at the test concentrations up to and including 14 mg/L (22 mg/L nominal) all fish survived until the end of the test and no symptoms of intoxication were observed. At the next higher test concentration of 34 mg/L (nominal 46 mg/L) all test fish showed one or several intoxication symptoms at the observation after the test termination. At the highest test concentration of 75 mg/L (100 mg/L nominal) three of the seven fish died. All four surviving fish showed symptoms of high intoxication after 96 h. The EC50 should be taken with caution because the mortality was lower than 50% up to the highest concentration tested. Therefore, the EC50 was calculated by linear extrapolation between the log concentration and the percent mortality. Under the study conditions, the 96 h LC50 and NOEC of the test substance in Rainbow trout were determined to be 75 and 14 mg/L (measured), respectively (Batscher, 1999).
Reference
Description of key information
Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 75 mg/L
Additional information
A study was conducted to determine the short-term toxicity of the test substance, isoC18 MIPA (94.1% active), to fish according to OECD Guideline 203 and EU Method C.1, in compliance with GLP. Rainbow trout (Oncorhynchus mykiss) were exposed to the test substance (dispersed in test medium by ultrasonication and stirring) at nominal concentrations of 0, 4.6, 10, 22, 46 and 100 mg/L for 96 h under semi-static conditions. Samples for analytical confirmation were taken from the freshly prepared solutions at the start of the test and after 96 h. Mortality and other effects were observed at 3, 24, 48, 72 and 96 h following the start of exposure. Analysis of the samples showed that measured mean concentrations ranged from 88 to 96% of the nominal values. After the 24 h test medium renewal period the test substance concentrations had decreased to 30 - 76% of the nominal values. These losses were obviously caused by a separation of the dispersed test substance at the test medium surfaces and/or adsorption to the glass surfaces. These analytical results reflect the observations during the test that a part of the test substance had separated to the surface of the test medium after 24 h. The total mean measured test concentrations (calculated as the average of all measurements per test concentration) varied in the range of 64 to 75% of the nominal values. Therefore, the reported biological values were related to the total mean measured test substance concentrations (i.e. 14, 34 and 75 mg/L). In the control and at the test concentrations up to and including 14 mg/L (22 mg/L nominal) all fish survived until the end of the test and no symptoms of intoxication were observed. At the next higher test concentration of 34 mg/L (nominal 46 mg/L) all test fish showed one or several intoxication symptoms at the observation after the test termination. At the highest test concentration of 75 mg/L (100 mg/L nominal) three of the seven fish died. All four surviving fish showed symptoms of high intoxication after 96 h. The EC50 should be taken with caution because the mortality was lower than 50% up to the highest concentration tested. Therefore, the EC50 was calculated by linear extrapolation between the log concentration and the percent mortality. Under the study conditions, the 96 h LC50 and NOEC of the test substance in Rainbow trout were determined to be 75 and 14 mg/L (measured), respectively (Batscher, 1999).
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