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Short-term toxicity to aquatic invertebrates

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Reference
Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
of read aross substance
Justification for type of information:
Data for the target chemical is summarized based on the structurally similar read across chemicals
Reason / purpose for cross-reference:
read-across source
Reason / purpose for cross-reference:
read-across source
Qualifier:
according to guideline
Guideline:
other: as mentioned below
Principles of method if other than guideline:
WoE report is based on two short term toxicity study of aquatic invertebrate for the test chemical :1.This study was designed to assess the toxic effects of the test compound on the test Daphnids.2.To evalaute the toxicity on test material on aquatic invertebrate Daphnia magna
GLP compliance:
not specified
Specific details on test material used for the study:
- Name of test material: Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate- Molecular formula: C23H26N3.C2H3O2- Molecular weight: 403.5231g/mole- Smiles : CC(=O)[O-].CC1(C2=CC=CC=C2[N+](=C1C=CC3=CC=C(C=C3)N(C)CCC#N)C)C- Inchl: 1S/C23H26N3.C2H4O2/c1-23(2)20-8-5-6-9-21(20)26(4)22(23)15-12-18-10-13-19(14-11-18)25(3)17-7-16-24;1-2(3)4/h5-6,8-15H,7,17H2,1-4H3;1H3,(H,3,4)/q+1;/p-1- Substance type: Organic- Physical state: Greenish lustourous liquid
Analytical monitoring:
not specified
Details on sampling:
1.PREPARATION AND APPLICATION OF TEST SOLUTIONThe test substance was soluble in water. Therefore, the test solution was prepared by dissolving 10 mg of the test substance in 100 ml of ADaM’s media. Achieving test concentrations of 100 mg/L, respectively.2.The stock solution (100 g/L) was prepared by dissolving white powder in acetone. The test solutions of required concentrationas were prepared by mixing the stock solution of the test sample with reconstituted test water. The test solution were kept 10 min in ultrasonic bath.
Vehicle:
not specified
Test organisms (species):
Daphnia magna
Details on test organisms:
1 . TEST ORGANISM - Common name: Water flea - Strain/clone: No data - Source: Own breeding of Daphnia magna - Age: No data - Feeding during test : No feeding after hatching ACCLIMATION - Acclimation period: No data - Acclimation conditions (same as test or not): No data - Type and amount of food: No data - Feeding frequency: No data - Health during acclimation (any mortality observed): No data QUARANTINE (wild caught) - Duration: No data - Health/mortality: No data 2.TEST ORGANISM- Common name: Water flea- Strain: Straus- Source: Own breeding at University of Chemistry and Technology, Prague- Age at study initiation (mean and range, SD): The animals used for the test shall be less than 24 h old and should not be first brood progeny- Feeding during test: No feedingACCLIMATION - No data available- Acclimation period:- Acclimation conditions (same as test or not):- Type and amount of food:- Feeding frequency:- Health during acclimation (any mortality observed):
Test type:
static
Water media type:
freshwater
Limit test:
yes
Total exposure duration:
48 h
Hardness:
1) 145.5 mg of CaCO3
Test temperature:
1) and 2) 20 °C ± 2 °C
pH:
1) 7.12)Sample at concentration 100 mg/l: pH= 7.8 (changed to 7.7 during test)Control 1: pH= 7.6 (did not change during test)Control 1 + aceotone: pH=8 (changed to 8.1 during test)Control 2: pH=7.8 (changed to 7.7 during test)Control 2 + aceotone: pH=7.7 (did not changed during test)
Nominal and measured concentrations:
1) 100 mg/L2)6, 10, 17, 29, 50 and 100 mg/L
Details on test conditions:
1 . TEST SYSTEM- Test vessel: The test vessels used were all glass beaker having the water capacity of 25ml.- Material, size, headspace, fill volume: 20 ml - Aeration: No aeration during experiment- No. of organisms per vessel: 10 Daphnids- No. of vessels per concentration (replicates): No data - No. of vessels per control (replicates): No data - No. of vessels per vehicle control (replicates): No data - Biomass loading rate: No data TEST MEDIUM / WATER PARAMETERS - Source/preparation of dilution water: No data - Total organic carbon: No data - Particulate matter: No data - Metals: No data - Pesticides: No data - Chlorine: No data - Alkalinity: No data - Ca/mg ratio: No data - Conductivity: No data - Salinity: No data - Culture medium different from test medium: No data - Intervals of water quality measurement: No data OTHER TEST CONDITIONS - Adjustment of pH: No data - Photoperiod: 16 hours light and 8 hours dark EFFECT PARAMETERS MEASURED (with observation intervals if applicable) : Determination or calculation of the median effective concen trations (EC 50) and observations ((immobility, pH, Temperature, dissolved oxygen content) ) of the symptoms were done after 24 and 48 hours.VALIDITY OF THE TEST:1. In the control, including the control containing the solubilising agent, not more that 10 percent of the daphnids should have been immobiliz ed. 2. The dissolved oxygen concentration at the end of the test should be 3 mg/l in control and test vessels.2.TEST SYSTEM- Test vessel: 50 ml glass vessel- fill volume: 25 ml- No. of organisms per vessel: 5- No. of vessels per concentration (replicates): 4TEST MEDIUM / WATER PARAMETERS- Source/preparation of dilution water: Natural water (surface or ground water), reconstituted water or dechlorinated tap water are acceptable as culturing and dilution water if D. magna survives in it for the duration of the culturing, acclimation and testing without showing signs of stress. Waters in the range pH 6 to pH 9, with hardness between 140 mg/l and 275 mg/l (as CaCO3) are recommended.As an example, the preparation of dilution water meeting the requirements is described below.Dissolve known quantities of reagents in water. The dilution water prepared shall have a pH of 7.8 ± 0.5, a hardness of (225 ± 50) mg/l (expressed as CaCO3), a molar Ca + Mg ratio close to 4 + 1 and a dissolved oxygen concentration above 7 mg/l.Prepare the solutions specified below:- Calcium chloride solution: Dissolve 117.6 g of calcium chloride dihydrate (CaCl2.2H2O) in water (4.2) and make up to 1 l with water (4.2).- Magnesium sulfate solution: Dissolve 49.3 g of magnesium sulfate heptahydrate (MgSO4.7H2O) in water (4.2) and make up to 1 l with water (4.2).- Sodium bicarbonate solution: Dissolve 25.9 g of sodium bicarbonate (NaHCO3) in water (4.2) and make up to 1 l with water (4.2).- Potassium chloride solution: Dissolve 2.3 g of potassium chloride (KCI) in water (4.2) and make up to 1 l with water (4.2).MixingMix 2.5 ml of each of the four solutions and make up to 1 l with water.The dilution water shall be aerated until the dissolved oxygen concentration has reached saturation and the pH has stabilized. If necessary, adjust the pH to 7.8 ± 0.5 by adding sodium hydroxide (NaOH) solution or hydrochloric acid (HCI). The dilution water prepared in this way shall not be further aerated before use.- Sodium hydroxide solution, e.g. [NaOH] : 1 mol/l.- Hydrochloric acid, e.g. [HCl] : 1 mol/l.Reference substance: Dissolve 600 mg of potassium dichromate (K2Cr2O7) in water and make up to 1 l with water (4.2).OTHER TEST CONDITIONS- Adjustment of pH: no adjustment done- Photoperiod: No - Darkness- Light intensity:CALCULATION:EC50 was calculated using non linear regression by the software Prism 4.0
Reference substance (positive control):
yes
Remarks:
Potassium dichromate (K2Cr2O7) for Read across 2
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
100 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Read across 1
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
29.8 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Read across 2
Details on results:
2) - Results with reference substance valid- EC50: 0.79 mg/L (24 hours)
Validity criteria fulfilled:
not specified
Conclusions:
The test chemical 2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetate is likely to be toxic to Daphnia magna in the dose range of 29.8 to 100 mg/l
Executive summary:

Data available for the structurally and functionally similar read across chemicals has been reviewed to determine the short term toxicity of aquatic invertebrate of the test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate.The studies are as mentioned below:

1.Daphnia sp., Acute Immobilization Test according to OECD Guideline 202 was conducted for test material. The nominal concent ration selected for the experiment was 100 mg/L and test Daphnids were exposed to this concentration for 48hours. The Effective concentrations EC50 was found to be 100 mg/L. Also the substance was found to be not rapidly degradable.Thus according to CLP Criteria for aquatic classification of the substance, it is concluded that test material exhibits toxicity to aquatic invertebrate (Daphnia magna) in the chronic 3 classification category.

EC50 (48 hours) Experimental = 100 mg/L

2.Determination of the inhibition of the mobility of daphnids was carried out with the substance,according to OECD Guideline 202.

The test substance was tested at the concentrations 0, 6, 10, 17, 29, 50 and 100 mg/L. Effects on immobilisation were observed for 48 hours. The median effective concentration (EC50) for the test substance,1-(3-chloropropyl)-1,3-dihydro-2H-benzimidazol-2-one, in Daphnia magna was determined to be 29.8 mg/L for immobilisation effects.

This value indicates that the substance is likely to be hazardous to aquatic invertebrates and can be classified as Aquatic Chronic category 3 as per the CLP criteria.

Thus, based on the above summarised studies, Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate and it’s functionally similar read across substance, it can be concluded that effect concetration value is in the range of 29 to 100 mg/

L. Thus, comparing this value with the criteria of CLP regulation, Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate can be classified for short term toxicity for aquatic invertebrate .Hence,based on the data available for functionally similar read across, test chemical Reaction mass of 3H-Indolium, 2-[2-[4-[(2-cyanoethyl)methylamino]phenyl]ethenyl]-1,3,3-trimethyl- & acetate can be classified as Aquatic Chronic category 3 as per the CLP criteria.

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Description of key information

Short-term toxicity to aquatic invertebrate:

Data available for the structurally and functionally similar read across chemicals has been reviewed to determine the short term toxicity of aquatic invertebrate of the test chemical2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetate(65122 -06 -7).The studies are as mentioned below:

1.Daphnia sp., Acute Immobilization Test according to OECD Guideline 202 was conducted for test material. The nominal concent ration selected for the experiment was 100 mg/L and test Daphnids were exposed to this concentration for 48hours. The Effective concentrations EC50 was found to be 100 mg/L. Also the substance was found to be not rapidly degradable.Thus according to CLP Criteria for aquatic classification of the substance, it is concluded that test material exhibits toxicity to aquatic invertebrate (Daphnia magna) in the chronic 3 classification category.

EC50 (48 hours) Experimental = 100 mg/L

2.Determination of the inhibition of the mobility of daphnids was carried out with the substance,according to OECD Guideline 202.

The test substance was tested at the concentrations 0, 6, 10, 17, 29, 50 and 100 mg/L. Effects on immobilisation were observed for 48 hours. The median effective concentration (EC50) for the test substance,1-(3-chloropropyl)-1,3-dihydro-2H-benzimidazol-2-one, in Daphnia magna was determined to be 29.8 mg/L for immobilisation effects.

This value indicates that the substance is likely to be hazardous to aquatic invertebrates and can be classified as Aquatic Chronic category 3 as per the CLP criteria.

Thus, based on the above summarised studies,2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetateand it’s functionally similar read across substance, it can be concluded that effect concetration value is in the range of 29 to 100 mg/

L. Thus, comparing this value with the criteria of CLP regulation,2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetatecan be classified for short term toxicity for aquatic invertebrate .Hence,based on the data available for functionally similar read across, test chemical2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetatecan be classified as Aquatic Chronic category 3 as per the CLP criteria.

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Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
29.8 mg/L

Additional information

Short-term toxicity to aquatic invertebrate:

Data available for the structurally and functionally similar read across chemicals has been reviewed to determine the short term toxicity of aquatic invertebrate of the test chemical2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetate(65122 -06 -7).The studies are as mentioned below:

1.Daphnia sp., Acute Immobilization Test according to OECD Guideline 202 was conducted for test material. The nominal concent ration selected for the experiment was 100 mg/L and test Daphnids were exposed to this concentration for 48hours. The Effective concentrations EC50 was found to be 100 mg/L. Also the substance was found to be not rapidly degradable.Thus according to CLP Criteria for aquatic classification of the substance, it is concluded that test material exhibits toxicity to aquatic invertebrate (Daphnia magna) in the chronic 3 classification category.

EC50 (48 hours) Experimental = 100 mg/L

2.Determination of the inhibition of the mobility of daphnids was carried out with the substance,according to OECD Guideline 202.

The test substance was tested at the concentrations 0, 6, 10, 17, 29, 50 and 100 mg/L. Effects on immobilisation were observed for 48 hours. The median effective concentration (EC50) for the test substance,1-(3-chloropropyl)-1,3-dihydro-2H-benzimidazol-2-one, in Daphnia magna was determined to be 29.8 mg/L for immobilisation effects.

This value indicates that the substance is likely to be hazardous to aquatic invertebrates and can be classified as Aquatic Chronic category 3 as per the CLP criteria.

Thus, based on the above summarised studies,2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetateand it’s functionally similar read across substance, it can be concluded that effect concetration value is in the range of 29 to 100 mg/

L. Thus, comparing this value with the criteria of CLP regulation,2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetatecan be classified for short term toxicity for aquatic invertebrate .Hence,based on the data available for functionally similar read across, test chemical2-(2-{4-[(2-cyanoethyl)(methyl)amino]phenyl}vinyl)-1,3,3-trimethyl-3H-indolium acetatecan be classified as Aquatic Chronic category 3 as per the CLP criteria.

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