Registration Dossier

Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
January 24, 2007 - July 16, 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report Date:
2007

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)
Version / remarks:
adopted on December 17th, 2001
Deviations:
no
Qualifier:
according to
Guideline:
EU Method B.1 (Acute Toxicity (Oral))
Version / remarks:
Official Journal of the European communities No. L 152, April 30, 2004
Deviations:
no
GLP compliance:
yes (incl. certificate)
Test type:
acute toxic class method
Limit test:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Specific details on test material used for the study:
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
Directly before the administration the test material was prepared with the vehicle using a mini shaker (Vortex-Genie 2) and an Ultra-Turrax device (Janke and Kunkel).

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals and environmental conditions:
TEST ANIMALS
- Source: F. Winkelmann, Borchen, Germany
- Females (if applicable) nulliparous and non-pregnant: yes
- Age at study initiation: approx. 7 to 8 weeks
- Weight at study initiation :The mean initial body weight at the start of the study was 174 g (range from 157 to 181 g)
- Fasting period before study: 17 hours before until up to 4 hours after treatment
- Housing: separately in type III Makrolon cages
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: at least 7 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21 - 23°C
- Humidity (%): 45 - 64%
- Photoperiod (hrs dark / hrs light): 12 hour light - 12 hour dark regime

IN-LIFE DATES: From: day 1 To: day 15

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
methylcellulose
Remarks:
Methocel K4M Premium solution
Details on oral exposure:
VEHICLE
- Concentration in vehicle: 200 g/L
- Amount of vehicle (if gavage): 10 ml/kg
- Justification for choice of vehicle: well tolerated and established standard vehicle

Doses:
2000 mg/kg
No. of animals per sex per dose:
3 (m) / 3 (f)
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations: daily
- Frequency of weighing: day 1, 2, 4, 6, 8, 11, 13 and 15
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross pathology
Statistics:
Standard statistical methods have been applied for data processing.

Results and discussion

Effect levels
Key result
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Remarks on result:
not determinable due to absence of adverse toxic effects
Mortality:
All rats survived the observation period.
Clinical signs:
No signs of toxicity were detected in the 3 male and 3 female rats after treatment with 2000 mg/kg of the test item.
Body weight:
All female animals showed an inhibition of the body weight development on days 4 and 8.
Gross pathology:
The gross pathological examination revealed no organ alterations.

Any other information on results incl. tables

Study design

The test material was tested for acute toxicity in rats after single oral administration of 2000 mg/kg body weight. The test material was suspended with aqueous Methocel K4M Premium solution as vehicle.This study was performed according to the “Acute toxic class method“ (ATC) as described in OECD Guideline 423.

Results

No signs of toxicity were seen in the rats (3 males and 3 females) after treatment with 2000 mg/kg. All female animals showed an inhibition of the body weight development on days 4 and 8. There were no deaths during the course of the study.The gross pathological examination revealed no organ alterations.

Conclusion

Based on the result of this study, it is concluded that the test item has no acute toxic potential and that the LD50value is higher than 2000 mg/kg after single oral treatment in rats.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
Based on the result of this study, it is concluded that the test item has no acute toxic potential and that the LD50 value is higher than 2000 mg/kg after single oral treatment in rats.
Executive summary:

This study was performed according to GLP and is fully compliant OECD TG 423. Based on the result of this study, it is concluded that the test item has no acute toxic potential and that the LD50value is higher than 2000 mg/kg after single oral treatment in rats.