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Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Endpoint:
short-term toxicity to fish
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: pre-guideline study and similar to OECD TG 203, but limited documentation

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1980
Report date:
1980

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 203 (Fish, Acute Toxicity Test)
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
9-ethylcarbazole
EC Number:
201-660-4
EC Name:
9-ethylcarbazole
Cas Number:
86-28-2
Molecular formula:
C14H13N
IUPAC Name:
9-ethyl-9H-carbazole

Sampling and analysis

Analytical monitoring:
no

Test organisms

Test organisms (species):
Idus idus
Details on test organisms:
- Common name: Golden Orfe (idus idus melanotus)
- Length at study initiation: 4.2 cm
- Weight at study initiation: 2.7 g

ACCLIMATION
- Acclimation period: 7 days
- Acclimation conditions: 22 ± 1°C in test water

Study design

Test type:
static
Water media type:
not specified
Limit test:
no
Total exposure duration:
96 h

Test conditions

Nominal and measured concentrations:
1 mg/L, 10 mg/L, 100 mg/L and 500 mg/L (nominal)
Details on test conditions:
- Aeration: ≥ 7 mg/L O2
- No. of organisms per vessel: 10

Results and discussion

Effect concentrations
Duration:
96 h
Dose descriptor:
LC50
Effect conc.:
> 1 - < 10 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mortality (fish)

Any other information on results incl. tables

Sublethal observations / clinical signs:

Concentration

[mg/L]

Mortalities

 

24 h

48 h

72 h

96 h

500

10

10

10

10

100

10

10

10

10

10

9

10

10

10

1

0

0

0

0

Applicant's summary and conclusion

Conclusions:
LC50(96 h): > 1 mg/L - < 10 mg/L, log Pow (see 4.7.): 4.47

Directive 67/548/EEC: Acute aquatic toxicity N, R 51/53
Regulation (EC) No 1272/2008: Chronic aquatic hazard Category 2
Executive summary:

The 1 mg/L solution of the test item didn´t show any signs of toxicity nor lethality at all observation time points up to 96 hours. Therefore, the NOEC and LC0were laid down as >= 1 mg/lL. The 10 mg/L solution resulted in 100 % mortality of the fish. Therefore the LC50(96) is < 10 mg/L.

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