Registration Dossier

Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1977-03-11
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study is considered to be a reliability 2 since it predates GLP but is similar to OECD TG 401.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1977
Report Date:
1977

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
GLP compliance:
no
Test type:
standard acute method
Limit test:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent

Test animals

Species:
rat
Strain:
Sprague-Dawley
Sex:
male/female
Details on test animals and environmental conditions:
TEST ANIMALS
- Weight at study initiation: mean weight males 222.5 g and females 217.5 g

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
unchanged (no vehicle)
Doses:
5010, 6310, 7940, and 10000 mg/kg bw
No. of animals per sex per dose:
5 animals per dose. 2 or 3 males or females per dose.
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Necropsy of survivors performed: yes, gross autopsy was performed.
- Body weights: Individual body weights were recorded before treatment.

Results and discussion

Effect levels
Key result
Sex:
male/female
Dose descriptor:
LD50
Effect level:
8 200 mg/kg bw
Based on:
test mat.
95% CL:
>= 7 300 - <= 9 270
Mortality:
5010 mg/kg: 0/3 males and 0/2 females
6310 mg/kg: 0/2 males and 1/3 females
7940 mg/kg: 0/3 males and 1/2 females
10000 mg/kg: 2/2 males and 3/3 females
Animals died within one to four days.
Clinical signs:
Reduced appetite and activity (one to four days in survivors), increasing weakness, ocular discharge, collapse, and death.
Gross pathology:
Hemorrhagic areas of the lungs, liver discoloration, and acute gastrointestinal inflammation. In the survivors (14-days) the viscera appeared normal.

Applicant's summary and conclusion

Interpretation of results:
other: not classified
Remarks:
according to CLP Regulation (EC) 1272/2008
Conclusions:
The acute oral toxicity test showed a LD50 of 8200 mg/kg bw
Executive summary:

In the study which predated GLP and OECD guidelines, a single oral administration of 5010, 6310, 7940, and 10000 mg/kg bw test substance to a group of 5 rats (2 or 3 males and 2 or 3 females) was investigated for 14 days. Reduced appetite and activity (one to four days in survivors), increasing weakness, ocular discharge, collapse, and mortality were observed. At necropsy hemorrhagic areas of the lungs, liver discoloration, and acute gastrointestinal inflammation were observed. In the survivors (14-days) the viscera appeared normal. In the 5010, 6310, 7940, and 10000 mg/kg dose group, 0/5, 1/5, 1/5, and 5/5 animals died within one to four days, respectively. Under the conditions of the test the oral acute LD50 in rats was determined to be 8200 mg/kg (95% Confidence limits 7300 - 9270 mg/kg bw).