Trimethyloxosulphonium iodide

Short-term toxicity to fish

Administrative data

Endpoint:

short-term toxicity to fish

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well documented study according to international accepted guidelines and GLP compliant.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: Japanese MAFF 2-7-1-1, Acute Fish Toxicity in Data Requirements for Supplying the Registration of Agricultural Chemical Pesticides

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 203 (Fish, Acute Toxicity Test)

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Trimethyloxosulphonium iodide

EC Number:

217-204-2

EC Name:

Trimethyloxosulphonium iodide

Cas Number:

1774-47-6

Molecular formula:

C3H9OS.I

IUPAC Name:

trimethyl(oxo)-λ⁶-sulfanylium iodide

Test material form:

solid: crystalline

Details on test material:

Name of test substance: Trimethylsulfoxonium iodide
CAS number: 1774-47-6
Purity: 99,5 %
Observed odour: Odourless
Quated solubility in water: Soluble
Observed appearance: Pale yellow crystalline powder

Sampling and analysis

Analytical monitoring:

not specified

Test solutions

Vehicle:

yes

Details on test solutions:

Test volume: 20 litres
Number of replicates: 1 replicate at each control and test concentration.
Test concentration: The test concentration was prepared by weighing 2.0 g of test substance and directly adding to 20 litres of dilution media to produce a test concentration of 100 mg/l.
The test solution was clear and colourless.

Test organisms

Test organisms (species):

Cyprinus carpio

Details on test organisms:

Mean length: 50.6 mm
Mean weight: 1.50 g
Seven carp were placed in each of the control and test vessels.

Study design

Test type:

semi-static

Water media type:

freshwater

Limit test:

yes

Total exposure duration:

96 h

Test conditions

Hardness:

The measured hardness of a sample of dilution water was 183 mg CaCo3/l.

Test temperature:

Range of test temperature values: 20.7 to 22.0 °C

pH:

Range of test pH values: 7.9 to 8.5

Dissolved oxygen:

Range of test dissolved oxygen values: 80 to 91 % ASV

Nominal and measured concentrations:

Concentrations: 0 and 100 mg/l

Details on test conditions:

The test vessels were maintained at 22.0 ± 2.0 °C with a photo period of 16 hours light and 8 hours dark.

Reference substance (positive control):

yes

Remarks:

Copper (II) Suplhate

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

> 100 mg/L

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 2

Duration:

96 h

Dose descriptor:

NOEC

Effect conc.:

100 mg/L

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

In this Cyprinus carpio, Acute Toxicity Test for Trimethylsulfoxonium Iodide (CAS No. 1774-47-6) the results indicated that the test item is not hazardous to the aquatic environment.