Zeolite, silica and sodium and titanium based, crystalline, synthetic, non fibrous

Toxicity to terrestrial plants

Administrative data

Endpoint:

toxicity to terrestrial plants: long-term

Type of information:

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

Adequacy of study:

key study

Study period:

2002-11-25

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP-Guideline study. According to the ECHA guidance document "Practical guide 6: How to report read-across and categories (March 2010)", the reliability was changed from RL1 to RL2.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2003

Report date:

2003

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 208 (Terrestrial Plants Test: Seedling Emergence and Seedling Growth Test)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Sächsisches Staatsministerium für Umwelt und Landwirtschaft, Sachsen, Germany

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): Zeolite A, Ca++-form: Vegobond 5A Powder
- Chemical name: Zeolite, cuboidal, crystalline, synthetic, non-fibrous
- Framework: cuboidal
- Related CAS number (according to inventory issues): 1327-36-2
- Related CAS number: 1318-02-1
- Physical state: white powder
- Analytical purity: 80.65%
- Lot/batch No.: 1103
- Storage condition of test material: room temperature, dark and dry
- Surface modified with Ca

Sampling and analysis

Analytical monitoring:

no

Test substrate

Vehicle:

no

Details on preparation and application of test substrate:

agricultural soil from site Gerichshain, stored >1 year before use in the test, no pesticides and fertilisers applied for at least 5 years
Soil characteristics: sandy loam, pH 6.0, 0.8% organic carbon content, 1.4% humus content, 36.7% water holding capacity, particle size: 9.7% clay, 49.7% silt, 40.6% sand, 35.7% washed out particles.

Test organisms

Species:

Raphanus sativus

Plant group:

Dicotyledonae (dicots)

Details on test organisms:

Seeds (Raphanus sativus Rodos, seed germination rate 92%) were purchased from Dehner Gartencenter, D-04425 Taucha.

Study design

Test type:

other: OECD Guideline 208 (Terrestrial Plants Test: Seedling Emergence and Seedling Growth Test

Study type:

laboratory study

Substrate type:

natural soil

Limit test:

no

Total exposure duration:

21 d

Test conditions

Test temperature:

18-30 °C

pH:

6.0

Moisture:

relative humidity: 15-37%

Nominal and measured concentrations:

Following concentrations were tested: 0, 15, 30, 60, 120 and 240 g/kg d.w.

Results and discussion

Effect concentrations

Effect concentrations 1

Species:

Raphanus sativus

Duration:

21 d

Dose descriptor:

LC50

Effect conc.:

> 240 000 mg/kg soil dw

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

seedling emergence

Effect concentrations 2

Species:

Raphanus sativus

Duration:

21 d

Dose descriptor:

NOEC

Effect conc.:

240 000 mg/kg soil dw

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: shoot fresh weight

Effect concentrations 3

Species:

Raphanus sativus

Duration:

21 d

Dose descriptor:

NOEC

Effect conc.:

60 000 mg/kg soil dw

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

other: plant height

Any other information on results incl. tables

Emergence in the control group was 100%, no phytotoxic effects visible.
LC50/EC50 was >240 g/kg d.w. for all parameters.
NOEC for shoot fresh weight was 240 g/kg d.w. A statistically significant increase in shoot fresh weight was observed at 60, 120 and 240 g/kg, the resulting NOEC for shoot fresh weight increase was 30 g/kg d.w.
NOEC for plant height was 60 g/kg.
No visual signs of phototoxicity (chlorosis, necrosis) were observed at any dose level.
The results are based on nominal concentrations of the test substance.