Zirconium praseodymium yellow zircon

Short-term toxicity to fish

Administrative data

Endpoint:

short-term toxicity to fish

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

1992-07-13 to 1992-07-17

Reliability:

3 (not reliable)

Rationale for reliability incl. deficiencies:

other: Documentation insufficient for assessment.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1992

Report date:

1992

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 203 (Fish, Acute Toxicity Test)

Version / remarks:

, adopted 1984-04-04, considering the updated draft december 1989

GLP compliance:

yes

Remarks:

exception: no stability control in the test medium was performed

Test material

Test material information

Constituent 1

Reference substance name:

Zirconium praseodymium yellow zircon

EC Number:

269-075-7

EC Name:

Zirconium praseodymium yellow zircon

Cas Number:

68187-15-5

Molecular formula:

Pr(x)Zr(1-x)SiO4 0,03≤x≤0,09

IUPAC Name:

silicon(4+) zirconium(4+) λ⁴-praseodymium(4+) dipraseodymium(3+) nonaoxidandiide

Test material form:

solid

Details on test material:

- Name: Sicocer F Gelb 2214
- EC Name: Zirconium Praseodymium Yellow Zircon
- Substance type: inorganic pigment
- Physical state: solid, yellow powder, odourless
- Storage condition of test material: at room temperature

Specific details on test material used for the study:

Details on properties of test surrogate or analogue material (migrated information):
Not appropriate

Sampling and analysis

Analytical monitoring:

no

Test solutions

Vehicle:

yes

Details on test solutions:

PREPARATION OF TEST SUBSTANCE:
The product was added to the test water separately for each concentration by mixing with 1 g Tween 80 (0.1 g/liter of test water); subsequently aqua bidest. was added in small quantities and then this mixture was transferred into the test water using an ultra-turrax stirrer. Analogously 0.1 g Tween 80 /liter test water was added to a carrier control. Subsequently the fish were placed into the aquaria.

Test organisms

Test organisms (species):

Danio rerio (previous name: Brachydanio rerio)

Details on test organisms:

TEST ORGANISM
- Common name: zebra fish (Brachydanio rerio Ham. and Buch.)
- Source: West aquarium GmbH, D-W3422 BAd Lauterberg, FRG
- Length at study initiation: 2.96 cm (range: 2.5 - 3.6)
- Weight at study initiation: 0.23 g (range: 0.09 - 0.34)
- Feeding during test: 1 day before and during exposure food was withdrawn
- Corpulence factor of the batch: 0.89 (the corpulence factor K is calculated from the weight W (g) and the length L (cm) measured from the tip of the mouth to the distal end of the cuadal fin accroding to the formula K = 100 * w/l ** 3)

ACCLIMATION
- Acclimation period: 2 months
- Acclimation conditions: The fish were kept in a flow-through tank in tap water, not chlorinated, passed through an active carbon filter and aerated with oil-free air.
- Photoperiod: 16 hours light and 8 hours dark
- Water conditions: total hardness: about 2.5 mmol/l, acid capacity: about 5.5 mmol/L; oxygen content: > 60% of maximum saturation; pH: about 8.0; temperature: 21 -25 °C
- Type and amount of food: "Tetra min" standard feed for aquarium fish (Tetra-Werke, D-W4520 Melle, FRG)(ad libitum) and on workdays additionally live and frozen artemia
- Health during acclimation (any mortality observed): Mortality during the last 2 weeks of housing was 0%
- Medical treatment: none

Study design

Water media type:

freshwater

Total exposure duration:

96 h

Test conditions

Hardness:

Total hardness of water alone: about 2.5 mmol/l

Test temperature:

22°C (control, cehicle control group and test groups)

pH:

Control group: 8.6
Vehicle control group: 8.4
Test groups: 8.6

Dissolved oxygen:

control group: 7.6 mg/l
Vehicle control group: 7.4 mg/l
Test groups: 7.6 mg/l (100 mg/l) and 7.8 mg/l (10000 mg/l)

Salinity:

not appropriate

Nominal and measured concentrations:

Nominal concentrations: 100 mg/l and 10000 mg/l

Details on test conditions:

TEST SYSTEM
- Test vessel: All-glass aquarium (30 cm x 22 cm x 24 cm)
- Volume of water: 10 liters
- Aeration: slight
- No. of organisms per concentration: 10
- No. of vessels per concentration: 1
- No. of vessels per control: 1
- No. of vessels per vehicle control: 1
- Loading: 0.23 (g fish/ l test water)

TEST MEDIUM / WATER PARAMETERS
Test water: Municipal water of the city of Frankenthal, not chlorinated and passed through an active carbon filter.
- Carbon content: about 90 mg/l
- Magnesium content: about 10 mg/l
- Acid capcaity: about 5.5 mmol/l
- pH: about 7.5
- Intervals of water quality measurement: The test water is regularly assayed for chemical contaminants by the municipal authorities of Frankenthal and the technical services of BASF Aktiengesellschaft as well as for presence of microbes by a contract laboratory.


OTHER TEST CONDITIONS
- Photoperiod: 16 hours light and 8 hours darkness

EFFECT PARAMETERS MEASURED (with observation intervals if applicable) :
Mortality and symptoms were determined at 1, 4, 24, 48, 72 and 96 hours.

TEST CONCENTRATIONS
- Range finding study: Based on the results of range finding studies using tap water and the carrier Tween 80 (neither mortality nor any toxic signs up to the concentration 10 000 mg/l) the concentration 100 mg/l was selected according to the requirements of OECD guideline (highest concentration to be tested). For classification of hazards to water the concentration 10000 mg/l was tested in parallel.
No further information on test conditions was stated.

ADDITIONAL INFORMATION ON THE MAIN TEST:
The aquarium contents were coloured and cloudy. Sedimentary test substance was visible about 24 hours after the beginning.

Reference substance (positive control):

no

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

1 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 2

Duration:

4 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 3

Duration:

24 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 4

Duration:

48 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 5

Duration:

72 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Effect concentrations 6

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

> 10 000 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Details on results:

No dead fish or detectable syptoms were seen in control, vehicle control or test group after 1, 4, 24, 48, 72, and 96 h.

Results with reference substance (positive control):

None

Reported statistics and error estimates:

Determination of mortality and symptoms:
Determination or calculation of the median lethal concentration (LC50) and, if possible, the LC5 and the LC95 using the probit analysis (Finney, D.J., Probit analysis, Cambr. Univ. Press, 3rd Ed., 1971) after hours (nominal conc.): 1, 4, 24, 48, 72, and 96 hours.

Applicant's summary and conclusion

Conclusions:

LC50 (96h) > 10000 mg/l (nominal concentration)
NOEC: 10000 mg/L
Maximum concentration tested causing no mortality: 10000 mg/l
Minimum concentration causing 100 % mortality: > 10000 mg/l