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EC number: 276-423-1 | CAS number: 72152-71-7
- 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
Toxicity to aquatic plants other than algae
Administrative data
- Endpoint:
- toxicity to aquatic plants other than algae
- Remarks:
- Toxicity to the Aquatic Plant Lemna gibba
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- according to OECD, EU guideline andGLP
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 221 (Lemna sp. Growth Inhibition Test)
- Qualifier:
- according to guideline
- Guideline:
- other: Commission Regulation (EC) No 761/2009, C.26.
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Disodium [6-hydroxy-5-[(2-hydroxy-5-sulphophenyl)azo]naphthalene-2-sulphonato(4-)]cuprate(2-)
- EC Number:
- 276-423-1
- EC Name:
- Disodium [6-hydroxy-5-[(2-hydroxy-5-sulphophenyl)azo]naphthalene-2-sulphonato(4-)]cuprate(2-)
- Cas Number:
- 72152-71-7
- Molecular formula:
- C16H8CuN2O8S2.2Na
- IUPAC Name:
- Cuprate(2-), [6-(hydroxy-kO)-5-[2-[2-(hydroxy-kO)-5-sulfophenyl]diazenyl-kN1]-2-naphthalenesulfonato(4-)]-, sodium
Constituent 1
Sampling and analysis
- Analytical monitoring:
- yes
- Details on sampling:
- Duplicate samples from the freshly prepared test media of all test concentrations and the control were taken at the start of the test.
For the determination of the stability of the test item under the test conditions and of the maintenance of the test item concentrations during the test period, duplicate samples were taken at the end of the test from all test media and the control of the actual test by pouring together the contents of each treatment.
Additional samples of the control were taken at test start and test end.
Test solutions
- Vehicle:
- no
- Details on test solutions:
- Test Concentrations: 200, 50, 12.5, 3.125, 0.781, 0.195 and 0.049 mg test item/L and a control
corresponding to following mean measured concentrations of the test item:
200, 48.6, 12.0, 2.8, 0.5*, 0.25** and 0.25**mg test item/L
*For values < Limit of Quantification half the Limit of Quantification (1 mg test item/L) was used
**For values < Limit of Detection the Limit of Detection (0.25 mg test item/L) was used.
Control: In the control, test medium was used without addition of the test item.
Dosage of Test Item: The test medium of the highest test concentration of nominal 200 mg test item/L was prepared by dissolving 216.2 mg test item into 1081 mL test water by intense stirring for 10 minutes and ultrasonic treatment for 2 minutes. Adequate volumes of this test medium were diluted with test water to prepare the test media of the other desired test concentrations.
The test media were prepared just before introduction of the Lemna (= start of the test).
Appearance of the Test Item
in Test Medium:
The test media were coloured depending on the test item concentration from slightly rose to dark red .
Test organisms
- Test organisms (species):
- Lemna gibba
- Details on test organisms:
- Species: Lemna gibba G 3
Origin: The fronds introduced in the test were taken from ibacon's in-house laboratory culture.
Breeding Conditions: The plants are cultured in the laboratories of ibacon under standardised conditions according to the test guidelines.
Pre-Culture: For at 5 days under test conditions with weekly media exchange.
Study design
- Test type:
- static
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 7 d
Test conditions
- Test temperature:
- 22 to 24 °C
- pH:
- 7.5 to 7.6 at test start; 8.4 to 8.5 at test end
- Nominal and measured concentrations:
- 200, 50, 12.5, 3.125, 0.781, 0.195 and 0.049 mg test item/L and a control
corresponding to following mean measured concentrations of the test item:
200, 48.6, 12.0, 2.8, 0.5*, 0.25** and 0.25**mg test item/L
*For values < Limit of Quantification half the Limit of Quantification (1 mg test item/L) was used
**For values < Limit of Detection the Limit of Detection (0.25 mg test item/L) was used. - Details on test conditions:
- Test Environment: Controlled environment room
Water Temperature: The temperature was measured daily in a test vessel filled with water and incubated under the same conditions as the test vessels.
22 to 24 °C
pH-Values: The pH-value of each treatment was measured at test start and at test end.
7.5 to 7.6 at test start
8.4 to 8.5 at test end
Light Regime: Continuous illumination
Light Intensity: 7747 Lux (mean value) with a range of 6600 to 8260 lux.
The illumination was achieved by fluorescent tubes, installed above the test vessels. Measurements were performed once during the test at 6 places distributed over the experimental area at the surface of the test media. Differences in light intensity over the test area did not exceed ± 15 %. - Reference substance (positive control):
- yes
- Remarks:
- For the evaluation of the quality of the Lemna gibba and the experimental conditions the substance 3,5-dichlorophenol is tested at least twice a year to demonstrate satisfactory test conditions.
Results and discussion
Effect concentrationsopen allclose all
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Effect conc.:
- 14.1 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- frond number
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Basis for effect:
- growth rate
- Remarks on result:
- not determinable
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Effect conc.:
- 601.7 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- EC50
- Effect conc.:
- 13.7 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- EC20
- Effect conc.:
- 0.3 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- frond number
- Duration:
- 7 d
- Dose descriptor:
- EC20
- Effect conc.:
- 0.36 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- EC20
- Effect conc.:
- 4.19 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 7 d
- Dose descriptor:
- EC20
- Effect conc.:
- 4.28 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- EC10
- Basis for effect:
- frond number
- Remarks on result:
- not determinable
- Duration:
- 7 d
- Dose descriptor:
- EC10
- Remarks on result:
- not determinable
- Duration:
- 7 d
- Dose descriptor:
- EC10
- Effect conc.:
- 0.27 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 7 d
- Dose descriptor:
- EC10
- Effect conc.:
- 0.323 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.25 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- frond number
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.25 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.25 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 7 d
- Dose descriptor:
- NOEC
- Effect conc.:
- 0.25 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- LOEC
- Effect conc.:
- 0.5 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- frond number
- Duration:
- 7 d
- Dose descriptor:
- LOEC
- Effect conc.:
- 0.5 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Duration:
- 7 d
- Dose descriptor:
- LOEC
- Effect conc.:
- 0.5 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- growth rate
- Duration:
- 7 d
- Dose descriptor:
- LOEC
- Effect conc.:
- 0.5 mg/L
- Nominal / measured:
- meas. (arithm. mean)
- Conc. based on:
- test mat.
- Basis for effect:
- biomass
- Details on results:
- Growth Inhibition: The 7-day EyC50 was calculated to be 14.1 and 13.7 mg test item/L for frond number and dry weight, respectively.
The 7-day ErC50 frond number could not be calculated due to mathematical reasons. The 7-day ErC50 dry weight was calculated to 601.7 mg test item/L.
The 7-day EyC10 could not be calculated due to mathematical reasons.
The 7-day ErC10 was calculated to be 0.27 and 0.323 mg test item/L for frond number and dry weight, respectively.
The 7-day NOEyC and the LOEyC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
The 7-day NOErC and the LOErC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
Shape of Fronds: The shape of fronds and colonies after the test period of 7 days was not different to those in the control up to and including the nominal test concentration of 0.195 mg test item/L.
At the higher test item concentrations the fronds showed deviations from the control replicates after 7 days; i.e. gibbous growth, shorted roots and smaller fronds. . - Reported statistics and error estimates:
- The ErC50 and the EyC50 (see Definitions), the corresponding EC20 and EC10 values and where possible their 95 %-confidence limits were calculated by Probit analysis.
For the determination of the 7-day LOEyC and NOEyC values significant differences at the test concentrations compared to the control values were tested by the Williams t-test (frond number and dry weight).
For the determination of the 7-day LOErC and NOErC values significant differences at the test concentrations compared to the control values were tested by the Williams t-test (frond number and dry weight).
The software used to perform the statistical analysis was ToxRat Professional, Version 3.2.1, ToxRat Solutions GmbH.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Remarks:
- Doubling Time of Frond Number in Control: 2.1 days, validity criterion was met.
- Conclusions:
- The influence of the test item on the growth of the freshwater plant Lemna gibba was assessed in a static concentration-response test.
The 7-day EyC50 was calculated to be 14.1 and 13.7 mg test item/L for frond number and dry weight, respectively.
The 7-day ErC50 for frond number could not be calculated (> 200 mg test item/L) The 7-day ErC50 for dry weight was calculated to be 601.7 mg test item/L.
The 7-day NOEyC and the LOEyC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
The 7-day NOErC and the LOErC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
At the start of the test 100 % of the nominal test concentrations were found (average of the nominal concentrations of 200, 50, 12.5 and 3.125 mg test item/L). After 7 days test duration, 92 % of the nominal value was determined (average of the nominal concentrations of 200, 50, 12.5 and 3.125 mg test item/L). During the test the Lemna were exposed to a mean of 96 % of nominal. All reported results refer to mean measured concentrations. - Executive summary:
Toxicity to the Aquatic Plant Lemna gibba in a Static Growth Inhibition Test
Purpose: The purpose of this study was to determine the inhibitory effect of the test item on the growth of the freshwater aquatic plant Lemna gibba.
For this purpose, cultures of Lemna gibba were exposed in a static test to various concentrations under defined conditions. The inhibition of growth in relation to control cultures were determined over a test period of 7 days.
The test method of application and the test system are recommended by the test guidelines and Lemna gibba is the recommended test species.
The purpose of the analytical part of this study was to verify the concentrations of the test item in the test medium.
Guidelines/Recommendations:
Commission Regulation (EC) No 761/2009, Annex, Part C, C.26.: "Lemna sp. Growth Inhibition Test", Official Journal of the European Union (EN), dated August 24, 2009
OECD Guideline 221: "Lemna sp. Growth Inhibition Test", adopted March 23, 2006
SANCO/3029/99 rev.4 11/07/00: Residues: Guidance for generating and reporting methods of analysis in support of pre-registration data requirements for Annex II (part A; Section 4) and Annex III (part A; Section 5) of directive 91/414
Material and Methods
Test Species: Lemna gibba G 3
Test Design: This study encompassed 8 treatment groups (7 dose rates of the test item and a control) with three replicates per test concentration and control.
At test start 12 fronds were introduced in each replicate and incubated for 7 days under static conditions. The frond numbers were determined on day 2, 5 and 7. The dry weight of each replicate was determined at test termination.
Endpoints: Yield and growth rate based on frond number and dry weight.
Test Concentrations: 200, 50, 12.5, 3.125, 0.781, 0.195 and 0.049 mg test item/L and a control
corresponding to following mean measured concentrations of the test item:
200, 48.6, 12.0, 2.8, 0.5*, 0.25** and 0.25**mg test item/L
*For values < Limit of Quantification half the Limit of Quantification (1 mg test item/L) was used
**For values < Limit of Detection the Limit of Detection (0.25 mg test item/L) was used.
Test Conditions: Water temperature: 22 to 24 °C; pH values at test start 7.5 to 7.6, at the end of the test 8.4 to 8.5; continuous illumination; mean light intensity: 7747 lux (6600 to 8260 lux).
Conclusion:
The influence of the test item on the growth of the freshwater plant Lemna gibba was assessed in a static concentration-response test.
The 7-day EyC50 was calculated to be 14.1 and 13.7 mg test item/L for frond number and dry weight, respectively.
The 7-day ErC50 for frond number could not be calculated (> 200 mg test item/L) The 7-day ErC50 for dry weight was calculated to be 601.7 mg test item/L.
The 7-day NOEyC and the LOEyC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
The 7-day NOErC and the LOErC were determined to be 0.25 and 0.50 mg test item/L for frond number and dry weight, respectively.
At the start of the test 100 % of the nominal test concentrations were found (average of the nominal concentrations of 200, 50, 12.5 and 3.125 mg test item/L). After 7 days test duration, 92 % of the nominal value was determined (average of the nominal concentrations of 200, 50, 12.5 and 3.125 mg test item/L). During the test the Lemna were exposed to a mean of 96 % of nominal. All reported results refer to mean measured concentrations.
This study is classified acceptable and satisfies the guideline requirements for aquatic plant studies.
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