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Administrative data

Description of key information

Acute Toxicity oral: OECD 423: LD50 > 2000 mg/kg bw

Acute Toxicity inhalative: no information

Acute Toxicity dermal: OECD 402: LD50 > 2000 mg/kg bw

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records
Reference
Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
June 30, 2004 - Sepember 14, 2004
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
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:
Commission Directive of 30th. July 1996 adapting to technical progress for the 22nd time Council Directive 67/548/EEC on the approximation of the laws, regulations and administrative provisions relating to the classification, packaging and labeling of dangerous substances
(Official Journal of the European communities No. L 248, September 30, 1996)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Test type:
acute toxic class method
Limit test:
yes
Test material information:
Composition 1
Specific details on test material used for the study:
Purity 99.9 %




TREATMENT OF TEST MATERIAL PRIOR TO TESTING
Directly before administration the test material was prepared with the vehicle using a mini shaker (Vortex Genie 2) and an Ultra-Turrax device (Janke and Kunkel).
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 9 weeks
- Weight at study initiation :178 g (range from 162 to 193 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): 23 - 24°C
- Humidity (%): 49 - 66%
- Photoperiod (hrs dark / hrs light): 12 hour light - 12 hour dark regime

IN-LIFE DATES: From: day 1 To: day 15
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.
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.
Body weight:
Body weight development of the treated rats was inconspicuous.
Gross pathology:
The gross pathological examination revealed no organ alterations.

Study design

The test material was tested for acute toxicity in rats after oral administration of 2000 mg/kg body weight. Directly before administration the test material was prepared with aqueous Methocel®K4M Premium solution as the vehicle.

Results

No signs of toxicity were detected in the rats (3 males and 3 females) after treatment with 2000 mg/kg. 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 materialh as no acute toxic potential and that the LD50value is higher than 2000 mg/kg after oral treatment in rats.

Interpretation of results:
GHS criteria not met
Conclusions:
Based on the result of this study, it is concluded that the test material has no acute toxic potential and that the LD50 value is higher than 2000 mg/kg after 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 material has no acute toxic potential and that the LD50value is higher than 2000 mg/kg after oral treatment in rats.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
2 000 mg/kg bw

Acute toxicity: via inhalation route

Endpoint conclusion
Endpoint conclusion:
no study available

Acute toxicity: via dermal route

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
2 000 mg/kg bw

Additional information

Justification for classification or non-classification

No adverse effects have been observed after single oral or dermal treament. No classification is warranted.