Fatty acids, C10-20-neo-

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

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was conducted according to O.E.C.D. testing guideline in compliance with the GLPs.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1995

Report date:

1995

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Fatty acids, C10-20-neo-

EC Number:

285-549-6

EC Name:

Fatty acids, C10-20-neo-

Cas Number:

85116-96-7

Molecular formula:

C10H20O2 ... C20H40O2

IUPAC Name:

C10-20-neo-Fatty acids

Sampling and analysis

Analytical monitoring:

yes

Test solutions

Vehicle:

no

Details on test solutions:

water accommodated fraction: loading rated of 4.6 - 220 mg/L. Stirred for 71 hours

Test organisms

Test organisms (species):

Daphnia magna

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Post exposure observation period:

None

Test conditions

Hardness:

190 mg CaCO3/L

Test temperature:

18.0 - 19.5°C

pH:

7.2 - 8.6

Dissolved oxygen:

9.1 - 9.4 mg/l

Salinity:

freshwater

Nominal and measured concentrations:

The nominal concentrations of the Water Accomodated Fraction were: : 4.6, 10, 22, 46, 100 and 220 mg/L.

Details on test conditions:

Treatment was conducted in 150 ml Erlenmeyer flasks, completely filled with WAF of VERSATIC 1019. The Daphnids were observed for immobility at: 24 and 48 h.

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

24 h

Dose descriptor:

EL50

Effect conc.:

> 22 - < 46 mg/L

Nominal / measured:

nominal

Conc. based on:

other: loading rate

Basis for effect:

mobility

Effect concentrations 2

Duration:

48 h

Dose descriptor:

EL50

Effect conc.:

> 22 - < 46 mg/L

Nominal / measured:

nominal

Conc. based on:

other: loading rate

Basis for effect:

mobility

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

Based on the conditions of the study, the EC50 for Daphnia was determined to be >22 mg/L and <46 mg/L.

Executive summary:

The acute toxicity to D. magna of water accommodated fractions of VERSATIC 1019 was determined in a 48 h static toxicity test . The test was conducted in sealed test vessels. The findings of an GLP, O.E.C.D. 202 Testing Guideline study with Daphnia magna conducted under static conditons of exposure demonstrated that the 48 - hr EC50 value was >22 mg/L and <46 mg/L.