Pentene

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Commenced on 11 October 1983

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study conducted in accordance with generally accepted scientific principles, possibly with incomplete reporting or methodological deficiencies, which do not affect the quality of the relevant results.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1984

Report date:

1984

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

Acute toxicity to was tested using the rainbow trout Daphnia magna to derive 24-h and 48-h EC50.

Statistical analysis was conducted according to the following reference;
Finney, D. J. (1971) Probit Analysis. Cambridge University Press, 3rd Edition, p. 333.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Pentene

EC Number:

246-916-6

EC Name:

Pentene

Cas Number:

25377-72-4

Molecular formula:

C5H10

IUPAC Name:

pent-1-ene

Details on test material:

- Name of test material (as cited in study report): pentene-1 (n-amylene)

- Substance type: Colourless volatile liquid.

- Analytical purity: 94.4%.

- Lot/batch No.: ST83/065

- Stability under test conditions: The test substance was judged to have been stable for the duration of this study.

- Storage condition of test material: In the dark at ambient temperature.

Sampling and analysis

Analytical monitoring:

not specified

Test solutions

Vehicle:

yes

Test organisms

Test organisms (species):

Daphnia magna

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Remarks on exposure duration:

Observation made at 24 and 48 hours.

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

24 h

Dose descriptor:

EC50

Effect conc.:

280 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: 95% fiducial limits: 150 - 210 mg/l

Effect concentrations 2

Duration:

48 h

Dose descriptor:

EC50

Effect conc.:

170 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Remarks on result:

other: 95% fiducial limits: 150 - 210 mg/l

Applicant's summary and conclusion

Validity criteria fulfilled:

not specified

Conclusions:

The acute toxicity of the test material, pentene-1, to Daphnia magna gave a 24-Hour EC50 value of 280 mg/l with 95% fiducial limits of 250 – 320 mg/l and the 48-h EC50 of 170 mg/l with 95% fiducial limits of 150 – 210 mg/l

Executive summary:

The acute toxicity to pentene-1 to the crustacean zooplankter, Daphnia magna was determined in a 48 h static test without renewal of the test solutions. The test vessels were completely full and sealed. The LC 50 values based on the number of D. magna immobilised at 24-h and 48-h were:

24-h EC50: 280 mg/l with 95% fiducial limits 250 – 320 mg/l

48-h EC50: 170 mg/l with 95% fiducial limits 150 – 210 mg/l.

The study methodologies or guidelines were not specified however the sufficient endpoint was derived to assess the acute toxiicty of the test organism. There are no information available regarding the testing facility therefore a reliability of 2 is assigned.