2-[(1-amino-9,10-dihydro-4-hydroxy-9,10-dioxo-2-anthryl)oxy]ethyl ethyl carbonate

Short-term toxicity to aquatic invertebrates

Link to relevant study record(s)

Reference

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

experimental study

Adequacy of study:

key study

Study period:

31.1.2000 to 03.02.2000

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method C.2 (Acute Toxicity for Daphnia)

Deviations:

no

GLP compliance:

no

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: 99 Labor Mischung 1
- Expiration date of the lot/batch: 01/2005

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature
- Solubility of the test substance in the solvent/vehicle: insoluble

Analytical monitoring:

no

Details on sampling:

- Concentration for the range-finding test: 0.01 / 0.1 / 1.0 / 10 and 100 mg/l
- Concentrations for the definitive test: 4.3 / 9.4 / 21 / 45 and 100 mg test item /l.

Vehicle:

no

Test organisms (species):

Daphnia magna

Details on test organisms:

TEST ORGANISM
- Common name: Water Flea
- Strain: Daphnia magna Straus
- Method of breeding: Cultures of Daphnia magna are held in glass vessels containing approximately 3 litres of reconstituted water at 18 - 22 °C. The water is renewed partially three times per week. The daphnids are fed with a suspension of green algae (Scenedesmus subspicatus) supplemented by a Tetramine-extract in such quantities that the food is consumed within 24 h.

Pre-treatment:
24 h before the start of the exposure, reproductive daphnids were separated from the young daphnids by sieving all individuals through a 1000 µm sieve. For each test concentration 20 daphnids divided into two groups of 10 animals were used.

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Hardness:

152 mg CaCO2 /l

Test temperature:

19.4 - 21.0 °C

pH:

8.0

Nominal and measured concentrations:

Nominal concentrations: 4.3 / 9.4 / 21 / 45 and 100 mg test item /l.

Details on test conditions:

TEST SYSTEM
- Test vessel: 250 ml beakers containing 50 - 100 ml test medium.
- Material, size, headspace, fill volume: 3 litres of reconstituted water at 18 - 22 °C.
- Aeration: No aeration
- Renewal rate of test solution: The water is renewed partially three times per week.
- No. of organisms per vessel: 10 animals per beaker
- No. of vessels per concentration (replicates): All tests were run in duplicate.
- No. of vessels per control (replicates): Duplicate

TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: Test medium prepared using bidistilled water. The test medium used the following composition: NaHCO3: 65 mg/l, MgSo4*7H2O: 123.3 mg/l, KCL: 5.8 mg/l, CaCl2*2H2O: 294 mg/l, Na2SiO3: 4.3 mg/l, NaNo3: 274 microgr/L, Kh2PO4: 143 microgr/L and K2HPO4: 184 microgr/L.
- Alkalinity: 0.8 mmol*l
- Ca/Mg ratio: 4:1
- Na/K ratio: 10:1
- Culture medium different from test medium: No

OTHER TEST CONDITIONS
- Photoperiod: 14 hours light and 10 hours dark.

TEST CONCENTRATIONS
- Spacing factor for test concentrations: >2
- Range finding study
- Test concentrations for range finding study: 0.01 / 0.1 / 1 / 10 and 100 mg/l
- Results used to determine the conditions for the definitive study: Yes

Reference substance (positive control):

yes

Remarks:

(Potassium dichromate is tested at least every 3 month)

Duration:

24 h

Dose descriptor:

EC0

Effect conc.:

100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: no confidence limits

Duration:

24 h

Dose descriptor:

EC50

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: no confidence limits

Duration:

24 h

Dose descriptor:

EC100

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: no confidence limits

Duration:

48 h

Dose descriptor:

EC0

Effect conc.:

9.4 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Duration:

48 h

Dose descriptor:

EC50

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: No confidence limits

Duration:

48 h

Dose descriptor:

EC100

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Details on results:

No Daphnia were immobilised in the control and in the lower test concentration of 4.3 and 9.4 mg/l after an exposure period of 48 h. At a test concentration of 21 mg/l one daphnid was immobilised after 48 h. Four daphnids were immobilised at 45 mg/l and a total of seven daphnids were immobilised at a test concentration of a 100 mg/l following the 48 h test period.

The EC0 value after 48 h was determined to be 9.4 mg/l.
The EC50 value after 48 h was determined as above 100 mg/l.
The EC100 value after 48 h is higher than 100 mg/l.

No remarkable observations were made concerning the appearance of the test media.

Results with reference substance (positive control):

For evaluation of the quality of the daphnids clone and the experimental conditions, potassium dichromate is tested every 3 months as a positive control.
The result of the latest positive control test in October 2006 is: EC50= 0.9 mg/l

Validity criteria fulfilled:

yes

Conclusions:

The EC50 of FAT 93503/A to Daphnia magna following an exposure priod of 48 h was determined to be >100 mg/l.

Executive summary:

The purpose of this acute toxicity study of FAT 93503/A to Daphnia magna Straus was to determine the EC₅₀-value for acute toxicity to aquatic invertebrates (Concentration at which 50 % of the daphnids test population was immobilised). This study was performed according to the OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test). The test duration is 48 h in a static condition test. A range-finding test was done with the following test concentrations: 0.01, 0.1, 1.0, 10 and 100 mg/l. Immobilisation of daphnids occurred at a 100 mg/l, hence the test concentrations for the definitive test were chosen as: 4.3, 9.4, 21, 45 and 100 mg/l. For each test concentration 20 daphnids divided into two groups of 10 animals were used. All test were run in duplicate. Additionally, a blank control without test item was carried out test concentrations were prepared from a stock solution. No daphnids were immobilised in the control and in the lower test concentration of 4.3 and 9.4 mg/l after an exposure period of 48 h. At a test concentration of 21 mg/l one daphnid was immobilised after 48 hours. Four daphnids were immobilised at 45 mg/l and a total of seven daphnids were immobilised at a test concentration of a 100 mg/l following the 48 h test period. The EC₀ value after 48 h was determined to be 9.4 mg/l. The EC₅₀ value after 48 h was determined as above 100 mg/l. The EC₁₀₀ value after 48 h is higher than 100 mg/l. In conclusion, the ecotoxicological classification of FAT 93503/A is "non-toxic" to Daphnia magna following an exposure period of 48 h.

Description of key information

The acute toxicity study of FAT 93503/A to Daphnia magna Straus is determined according to the OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test). The test duration is 48 hours under static test conditions. A range-finding test was done with the following test concentrations: 0.01, 0.1, 1.0, 10 and 100 mg/l. Immobilisation of daphnids occurred at a 100 mg/l, hence the test concentrations for the definitive test were chosen as: 4.3, 9.4, 21, 45 and 100 mg/l. For each test concentration 20 daphnids divided into two groups of 10 animals were used. All test were run in duplicate. Additionally, a blank control without test item was carried out. Test concentrations were prepared from a stock solution. No daphnids were immobilised in the control and in the lower test concentration of 4.3 and 9.4 mg/l after an exposure period of 48 h. At a test concentration of 21 mg/l one Daphnia was immobilised after 48 h. Four daphnids were immobilised at 45 mg/l and a total of seven daphnids were immobilised at a test concentration of a 100 mg/l following the 48 h test period.

-The EC₀ value after 48 h was determined to be 9.4 mg/l.

-The EC₅₀ value after 48 h was determined as above 100 mg/l.

-The EC₁₀₀ value after 48 hours is higher than 100 mg/l.

In conclusion, the ecotoxicological classification of FAT 93503/A is "non-toxic" to Daphnia magna following an exposure period of 48 h.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates

Effect concentration:

100 mg/L