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Administrative data

acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant guideline study, available as unpublished report, no restrictions, fully adequate for assessment.

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guidelineopen allclose all
according to guideline
OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)
according to guideline
EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)
GLP compliance:
yes (incl. QA statement)
RCC Ltd, Toxicology, CH-4452 Itingen, Switzerland
Test type:
acute toxic class method
Limit test:

Test material

Constituent 1
Test material form:
solid: particulate/powder
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): FAT 40821/A
- Purity: Approx. 81%
- Lot/batch No.: TVR1
- Expiration date of the lot/batch: 1 February 2010
- Stability of test item dilution: Stable in PEG 300 for 7 days at room temperature.
- Storage conditions: At room temperature (range of 20 ± 5 °C), light and moisture (desiccator) protected.

Test animals

Details on test animals or test system and environmental conditions:
- Source: RCC Ltd, Laboratory Animal Services, CH-4414 Füllinsdorf / Switzerland
- Age when treated: 12 weeks
- Fasting period before study: approximately 18 hours
- Housing: In groups of three in Makrolon type-4 cages with wire mesh tops and standard softwood bedding ('Lignocel' Schill AG, CH-4132 Muttenz/Switzerland).
- Diet: Pelleted standard Provimi Kliba 3433 rat/mouse maintenance diet, batch no. 92/04 (Provimi Kliba AG, CH-4303 Kaiseraugst/Switzerland), ad libitum.
- Water: Community tap water from Füllinsdorf ad libitum.
- Acclimation period: Under laboratory conditions, after health examination.

- Temperature (°C): 22±3
- Humidity (%): 30-70
- Air changes (per hr): 10-15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:
oral: gavage
polyethylene glycol
Details on oral exposure:
APPLICATION VOLUME: Test item dilution of 0.2 g/mL administered at a volume dosage of 10 mL/kg body weight.
2000 mg/kg bw
No. of animals per sex per dose:
3 females/group
Control animals:
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Mortality/Viability: Daily during the acclimatization period, during the first 30 minutes and at approximately 1, 2, 3 and 5 hours after administration on test day 1 (with the clinical signs) and twice daily during days 2-15. Body weights: On test days 1 (prior to administration), 8 and 15. Clinical signs: Daily during the acclimatization period, during the first 30 minutes and at approximately 1, 2, 3 and 5 hours after administration on test day 1. Once daily during days 2-15. All abnormalities were recorded.
- Necropsy of survivors performed: All animals were killed at the end of the observation period by an intraperitoneal injection of Vetanarcol at a dose of at least 2.0 mL/kg body weight (equivalent to at least 324 mg sodium pentobarbitone/kg body weight) and discarded after macroscopic examinations were performed. No organs or tissues were retained.
No statistical analysis was used.

Results and discussion

Effect levels
Dose descriptor:
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
No deaths occurred during the study.
Clinical signs:
Black discoloration of the faeces was observed from the 3-hour reading up to test day 3 in the first treated group and from the 2-hour reading up to test day 4 in the second treated group. Loose faeces was present 3 hours after application in the cage of the first treated group and on test day 2 in the cage of the second treated group. Diarrhea was noted from the 5-hour reading to test day 2 in the first treated group and from the 2- to 5-hour reading in the second treated group.
Body weight:
The body weight of the animals was within the range commonly recorded for this strain and age.
Gross pathology:
No macroscopic findings were recorded at necropsy.

Applicant's summary and conclusion

Interpretation of results:
not classified
Migrated information Criteria used for interpretation of results: EU
Based on the observations the median lethal dose of the test substance is greater than 2000 mg/kg body weight
Executive summary:

In a GLP compliant oral toxicity study, performed according to OECD guideline 423, Wistar rats (2 groups of 3 females) were administered the test substance (2000 mg/kg bw) by oral gavage followed by a 14-day observation period. All animals survived until the end of the study period and no changes in body weights and macroscopic findings were observed. The only clinical signs observed, were dark faeces up to test day 4 and diarrhea up to test day 2. Based on the observations, the median lethal dose of the test substance in female rats observed for a period of 14 days was greater than 2000 mg/kg bw.

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