Tall oil, sodium salt

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:

2003

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Remarks:

Guideline study without GLP. The test report is lacking in experimental detail but the test was conducted in accordance with a recognised guideline.

Qualifier:

according to guideline

Guideline:

ISO 6341 (Water quality - Determination of the Inhibition of the Mobility of Daphnia magna Straus (Cladocera, Crustacea))

GLP compliance:

not specified

Analytical monitoring:

no

Vehicle:

no

Details on test solutions:

PREPARATION AND APPLICATION OF TEST SOLUTION

- Method: Test media were prepared by dilution of a stock solution that had been prepared by 28.5x dilution of the substance.

Test organisms (species):

Daphnia magna

Details on test organisms:

TEST ORGANISM

- Source: Stock cultures at Gothenburg University

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Hardness:

No data

Test temperature:

No data

pH:

No data

Dissolved oxygen:

No data

Salinity:

Not applicable

Nominal and measured concentrations:

No data

Details on test conditions:

No data

Reference substance (positive control):

no

Key result

Duration:

48 h

Dose descriptor:

EL50

Effect conc.:

< 0.031 other: vol %

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mobility

Key result

Duration:

48 h

Dose descriptor:

EL50

Effect conc.:

< 320 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Remarks:

assuming density of sample is 1030 mg/ml

Basis for effect:

mobility

Details on results:

No data

Reported statistics and error estimates:

No data

Validity criteria fulfilled:

yes

Conclusions:

A 48-hour EL50 of <320 mg/L (<0.031 vol. %) has been determined for the effects of the test substance on mobility of Daphnia magna.

Description of key information

Reliable data are available that demonstrate the short-term toxicity of the registered substance to aquatic invertebrates. A 48-hour EL₅₀ of <320 mg/L (<0.031 vol. %) has been determined for the effects of the test substance on mobility of Daphnia magna tested as Water Accommodated Fractions (WAFs). A second test gave a 48-hour EL₅₀ of 560 mg/L (0.054 vol. %). Test results are also available for a closely related substance, Crude Tall Oil (provisional EC number 931-433-1). A 48-hour EL₅₀ of 32 mg/L and a NOELR of 6.25 mg/L were determined in the test using WAFs. It is concluded that the 48-hour EL₅₀ for the substance is likely to lie between loading rates of 32 and 320 mg/L.

Additional information

Calculation of PNECs for the aquatic compartment will be based on data for the blocks of constituents rather than on data for the whole substance.