Calcium sulfide (Ca(Sx))

Toxicity to aquatic algae and cyanobacteria

Link to relevant study record(s)

Reference

Endpoint:

toxicity to aquatic algae and cyanobacteria

Remarks:

Tessenderlo data

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

comparable to guideline study

Qualifier:

according to guideline

Guideline:

other: EPA FIFRA guidelines 122-2 and 123-2 (1982)

GLP compliance:

yes (incl. QA statement)

Analytical monitoring:

yes

Vehicle:

not specified

Test organisms (species):

Selenastrum sp.

Details on test organisms:

Springborn laboratories

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

5 d

Test temperature:

24 +-1 C

pH:

7.6-9.4

Conductivity:

100-90 micromohs/cm

Nominal and measured concentrations:

6.3, 13, 25, 50, 100, 200 mg active ingredients / liter

Key result

Duration:

5 d

Dose descriptor:

EC50

Effect conc.:

ca. 15 mg/L

Nominal / measured:

nominal

Conc. based on:

act. ingr.

Basis for effect:

cell number

Validity criteria fulfilled:

no

Conclusions:

EC50= 15 mg/l

Key value for chemical safety assessment

EC50 for freshwater algae:

15 mg/L