Silicic acid, titanium salt

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:

short-term toxicity to aquatic invertebrates

Type of information:

migrated information: read-across based on grouping of substances (category approach)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Guideline study with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1999

Report date:

1999

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Automatically generated during migration to IUCLID 6, no data available

IUPAC Name:

Automatically generated during migration to IUCLID 6, no data available

Details on test material:

- Name of test material (as cited in study report): Shieldex AC 3
- Substance type: calcium ion-exchanged amorphous silica
- Physical state: white powder

Sampling and analysis

Analytical monitoring:

no

Test solutions

Vehicle:

no

Details on test solutions:

PREPARATION AND APPLICATION OF TEST SOLUTION (especially for difficult test substances)
- Eluate: the test substance (different concentrations) was suspended in "daphnid-dilution water" and shaken for 24 h (130 rpm). After this incubation the suspensions were filtered via fluted filter, which were rinsed with deionised water before. The resulting eluates were used directly in the daphnid test (without further dilution).

Test organisms

Test organisms (species):

Daphnia magna

Details on test organisms:

TEST ORGANISM
- Strain: var. Straus
- Source: Dr. Knie LWA
- Age at study initiation: < 24 h

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

48 h

Test conditions

Hardness:

no data

Test temperature:

20 +/- 1 °C

pH:

at the start of the test/after 48 h:
control: 7.86/7.66
10000 mg/l: 9.35/8.07
1000 mg/l: 9.08 - 8.21
100 mg/l: 8.32-7.81

Dissolved oxygen:

at the start of the experiment: 8 mg/l
after 48 h: 8.3 - 8.7 mg/l

Nominal and measured concentrations:

Screening Test: 10000, 1000, 100 and 0 mg/L

Reference substance (positive control):

no

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

48 h

Dose descriptor:

EC0

Effect conc.:

> 1 000 mg/L

Nominal / measured:

nominal

Basis for effect:

mobility

Remarks on result:

other: eluat

Effect concentrations 2

Duration:

48 h

Dose descriptor:

EC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Basis for effect:

mobility

Remarks on result:

other: eluat

Any other information on results incl. tables

Immobile daphnids after 24 h in treatments and control [%]: 0

Immobile daphnids after 48 h in treatments and control [%]: 0

No main test was prepared, since the screening test showed no immobile daphnids at the highest concentration (10000 mg/L).

Applicant's summary and conclusion

Validity criteria fulfilled:

yes