Dipotassium disulphate

Toxicity to aquatic plants other than algae

Administrative data

Endpoint:

toxicity to aquatic plants other than algae

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

publication

Title:

Toxicity of Major Cations and Anions (Na, K, Ca, Cl, and SO4) to a Macrophyte and an Alga

Author:

Simmons JA

Year:

2012

Bibliographic source:

Environ. Toxicol. Chem., 31:1370–1374

Materials and methods

Principles of method if other than guideline:

Five replicate beakers were created for treatment. Twenty L. minor thalli were added, and the beakers were covered and incubated underneath fluorescent lights. Live and dead thalli were counted after 2 days (acute test) and 7 days (chronic test). A thallus was considered dead when no green pigment was visible.

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Potassium sulfate

EC Number:

231-915-5

EC Name:

Potassium sulfate

Cas Number:

7778-80-5

IUPAC Name:

dipotassium sulfate

Details on test material:

- Purity: not reported

Sampling and analysis

Analytical monitoring:

not specified

Test solutions

Vehicle:

no

Test organisms

Test organisms (species):

Lemna minor

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

7 d

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

2 d

Dose descriptor:

EC50

Effect conc.:

15 861 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: % survival

Effect concentrations 2

Duration:

2 d

Dose descriptor:

EC10

Effect conc.:

9 412 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: % survival

Effect concentrations 3

Duration:

7 d

Dose descriptor:

EC50

Effect conc.:

6 623 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: number of live thalli

Effect concentrations 4

Duration:

7 d

Dose descriptor:

EC10

Effect conc.:

1 203 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: number of live thalli

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

The EC50 (number of live thalli at 7 days) was 6623 mg/L and the EC10 (number of live thalli at 7 days) was 1203 mg/L.

Executive summary:

Five replicate beakers were created for treatment. Twenty L. minor thalli were added, and the beakers were covered and incubated underneath fluorescent lights. Live and dead thalli were counted after 2 days (acute test) and 7 days (chronic test). The EC50 (number of live thalli at 7 days) was 6623 mg/L and the EC10 (number of live thalli at 7 days) was 1203 mg/L.