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EC number: 500-344-6 | CAS number: 157627-94-6 1 - 2.5 moles ethoxylated
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:
- 12 - 16 Sep 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: EG Guideline 92/69 C.1
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 203 (Fish, Acute Toxicity Test)
- GLP compliance:
- yes
- Analytical monitoring:
- yes
- Vehicle:
- no
- Test organisms (species):
- Danio rerio (previous name: Brachydanio rerio)
- Details on test organisms:
- TEST ORGANISM
- Common name: zebrafish
- Source: West Aquarium, Bad Lauterberg, Germany
- Length at study initiation (length definition, mean, range and SD): 3 cm +/- 0.5 cm
- Weight at study initiation (mean and range, SD): approximately 0.25 g
- Feeding during test
- Food type: no feeding
ACCLIMATION
- Acclimation period: 14 days
- Type and amount of food: TetraMin at a concentration of 1% of body weight
- Feeding frequency: daily
- Health during acclimation (any mortality observed): <= 5% seven days prior test until test start - Test type:
- flow-through
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 96 h
- Hardness:
- 11 ° dH
- Test temperature:
- 19 °C - 20 °C
- pH:
- 8.0 - 8.2
- Dissolved oxygen:
- 80% - 99%
- Nominal and measured concentrations:
- nominal: 4.3, 6.0, 8.5, 11.8 and 17.1
mean measured (over 96 h): 4.6, 6.8, 13.9, 12.1 and 17.2 - Details on test conditions:
- TEST SYSTEM
- Test vessel:
- Material, size, headspace, fill volume: approximately 45 L aquaria
- Aeration: continuously
- Renewal rate of test solution (frequency/flow rate): approximately 10 L/h
- No. of organisms per vessel: 10
- No. of vessels per concentration (replicates): 1
- No. of vessels per control (replicates): 10
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: drinking water - Gelsenwasser AG
OTHER TEST CONDITIONS
- Photoperiod: 16 h light / 8 h darkness - Reference substance (positive control):
- no
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- 7.1 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr.
- Basis for effect:
- mortality (fish)
- Endpoint:
- short-term toxicity to fish
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 10 - 14 Nov 1994
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 203 (Fish, Acute Toxicity Test)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.1 (Acute Toxicity for Fish)
- GLP compliance:
- yes
- Analytical monitoring:
- yes
- Vehicle:
- no
- Test organisms (species):
- Danio rerio (previous name: Brachydanio rerio)
- Details on test organisms:
- TEST ORGANISM
- Common name: zebrafish
- Source: West Aquarium, Bad Lauterberg
- Length at study initiation (mean, SD): 3 cm +/- 0.5 cm
- Weight at study initiation (mean): approximately 0.26 g
- Feeding during test: none
ACCLIMATION
- Acclimation period: 14 days
- Acclimation conditions (same as test or not): maintained in dechlorinated drinking water in 200 L tanks of in 300 L glass tanks at 20 +/- 2 °C with continuous flow.
- Type and amount of food: Trouvit at an amount of approximately 1% of body weight
- Feeding frequency: daily
- Health during acclimation (any mortality observed): the mortality was 7 days before the test start <= 5% - Test type:
- flow-through
- Water media type:
- freshwater
- Limit test:
- no
- Total exposure duration:
- 96 h
- Hardness:
- approximately 11 °dH
- Test temperature:
- 20 °C - 23 °C
- pH:
- 8.1 - 8.2
- Dissolved oxygen:
- 90% - 103%
- Nominal and measured concentrations:
- nominal: 2.1, 3.5, 6.0, 10.0 and 17.0 mg/L
- Details on test conditions:
- TEST SYSTEM
- Test vessel: 45 L tanks
- Aeration: continuous in the test tanks
- Renewal rate of test solution (frequency/flow rate): flow rate: 10 L/h
- No. of organisms per vessel: 10
- No. of vessels per concentration (replicates): 1
- No. of vessels per control (replicates): 1
TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: drinking water (Gelsenwasser AG)
OTHER TEST CONDITIONS
- Photoperiod: 16 h light / 8 h darkness - Reference substance (positive control):
- no
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- 7.7 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- test mat.
- Basis for effect:
- mortality (fish)
- Sublethal observations / clinical signs:
Concentration
[mg/L]Test period (h)
24 h
48 h
72 h
96 h
Mortality [%]
Mortality [%]
Mortality [%]
Mortality [%]
Control
0
0
0
0
2.1
0
0
0
0
3.5
0
0
0
0
6.0
0
0
0
0
10.0
100
100
100
100
17.0
100
100
100
100
- Endpoint:
- short-term toxicity to fish
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- Please refer to the Category Approach Justification provided in Section 13
- Reason / purpose for cross-reference:
- read-across source
- Duration:
- 96 h
- Dose descriptor:
- LC50
- Effect conc.:
- 7.1 mg/L
- Nominal / measured:
- nominal
- Conc. based on:
- act. ingr.
- Basis for effect:
- mortality (fish)
- Remarks on result:
- other:
- Remarks:
- Source, key, 68891-38-3, 1994
Referenceopen allclose all
Description of key information
LC50 (96 h) for Danio rerio = 7.1 mg a.i./L (nominal, OECD 203)Key value for chemical safety assessment
Fresh water fish
Fresh water fish
- Effect concentration:
- 7.1 mg/L
Additional information
No acute fish study on toxic effects of AES (C12-14, 1-2.5 EO) TEA (CAS 157627-94-6) is available. Therefore, a read-across approach from two structural similar AES (C12 -14, 2.5EO) mixtures was applied.
Both studies were conducted under flow-through conditions according to OECD guideline 203 and GLP with the zebra fish Danio rerio as test species. In one study the fish were exposed for 96 hours to AES (C12-14, 1-2.5EO) Na (CAS 68891-38-3), which resulted in a LC50 value of 7.1 mg a.i./L (nominal) (Sasol, 1994). In the second study the fish were exposed for 96 hours to AES (C12-14, 1-2.5EO) MIPA (CAS 1187742 -72 -8), which resulted in a LC50 value of 7.7 mg a.i./L (nominal) (Sasol, 1999a).
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