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Description of key information

In an acute oral toxicity study in rats according to EC method B.1, the LD50 was determined to be > 5000 mg/kg bw for males and females. The dermal toxicity study according to EC method B.2 on Wistar rats resulted in a LD50 of > 2000 mg/kg.

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:
1991
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.1 (Acute Toxicity (Oral))
Deviations:
no
GLP compliance:
yes
Test type:
standard acute method
Limit test:
yes
Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: BRL Ltd., Basel, Switzerland
- Age at study initiation: approx. 8 weeks
- Weight at study initiation: males: 196 - 209 g / females: 156 - 176 g
- Fasting period before study: overnight prior to dosing
- Housing: group housing of 5 animals per sex per cage in polycarbonate cages containing purified sawdust as bedding material
- Diet (e.g. ad libitum): standard pelleted laboratory animal diet (Kliba 343 from KlingentalmOhle AG, Kaiseraugst, Switzerland).
- Water (e.g. ad libitum): tap water
- Acclimation period: at least 5 days before start of treatment under laboratory conditions

ENVIRONMENTAL CONDITIONS
- Temperature: 21°C
- Humidity: 55%
- Air changes: 15 air changes per hour
- Photoperiod: 12 hours artificial light
Route of administration:
oral: gavage
Vehicle:
water
Remarks:
prepared by reverse osmosis
Details on oral exposure:
The formulations were prepared immediately prior to dosing. The test substance was weighed into a glass flask on an analytical balance and the vehicle (w/w) was added. Homogeneity of the test substance in vehicle was obtained by stirring and shaking. The dose volume was 20 ml/kg body weight.
Doses:
5000 mg/kg
No. of animals per sex per dose:
5 animals per sex
Control animals:
no
Details on study design:
Duration of observation period following administration:
- mortality: at periodic intervals on the day of dosing (day 1) and twice daily thereafter for 14 days
- body weights: days 1, 8 and 15
- symptoms: at periodic intervals on the day of dosing (day 1) and once daily thereafter for 14 days.
- Necropsy of survivors performed: yes
Preliminary study:
not performed
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 5 000 mg/kg bw
Based on:
test mat.
Sex:
female
Dose descriptor:
LD50
Effect level:
> 5 000 mg/kg bw
Based on:
test mat.
Sex:
male
Dose descriptor:
LD50
Effect level:
> 5 000 mg/kg bw
Based on:
test mat.
Mortality:
Male: 5000 mglkg bw; Number of animals: 5; Number of deaths: 0
Female: 5000 mglkg bw; Number of animals: 5; Number of deaths: 0
Clinical signs:
other: No signs of toxicity were observed.
Gross pathology:
No treatment-related macroscopic findings were observed.
Interpretation of results:
not classified
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
The acute oral toxicity LD50 on rats was found to be > 5000 mg/kg.
Executive summary:

The study was performed according to the standard method EU B.1 on Wistar rats with a single dose of 5000 mg/kg. Five animals were used per sex. The animals were treated orally by gavage with an aqueous suspension of the the test material. The LD50 was determined to be > 5000 mg/kg; therefore, the test item does not have any classification/labelling requirements.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed
Dose descriptor:
LD50
Value:
5 000 mg/kg bw

Acute toxicity: via inhalation route

Endpoint conclusion
Endpoint conclusion:
no study available

Acute toxicity: via dermal route

Link to relevant study records
Reference
Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1991
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.3 (Acute Toxicity (Dermal))
Deviations:
no
GLP compliance:
yes
Test type:
standard acute method
Limit test:
yes
Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: BRL Ltd., Basel, Switzerland
- Age at study initiation: approx. 8 weeks
- Weight at study initiation: males: 203 - 228 g / females: 165 - 184 g
- Shaving: one day before exposure
- Housing: individual housing in polycarbonate cages containing purified sawdust as bedding material
- Diet (e.g. ad libitum): standard pelleted laboratory animal diet (Kliba 343 from KlingentalmOhle AG, Kaiseraugst, Switzerland).
- Water (e.g. ad libitum): tap water
- Acclimation period: at least 5 days before start of treatment under laboratory conditions

ENVIRONMENTAL CONDITIONS
- Temperature: 21°C
- Humidity: 55%
- Air changes: 15 air changes per hour
- Photoperiod: 12 hours artificial light
Type of coverage:
semiocclusive
Vehicle:
water
Details on dermal exposure:
TEST SITE
Area of exposure: formulation was applied to an area of approx. 25 cm2 (5x5 cm) for males and 18 cm2 (3.5x5 cm) for females by application on a gauze patch fixed successively to aluminium foil and flexible bandage (Coban, 3M, St. Paul, U.S.A.), with drops of petrolatum

TEST MATERIAL / VEHICLE
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw
- Dose volume:10 ml/kg body weight.
- Constant volume or concentration used: yes/no
- For solids, paste formed: yes
Duration of exposure:
24 hours
Doses:
2000 mg/kg bw
No. of animals per sex per dose:
5 males and 5 females
Control animals:
no
Details on study design:
Duration of observation period following administration:
- mortality: at periodic intervals on the day of dosing (day 1) and twice daily thereafter for 14 days
- body weights: days 1, 8 and 15
- symptoms: at periodic intervals on the day of dosing (day 1) and once daily thereafter for 14 days.
- Necropsy of survivors performed: yes
Preliminary study:
not performed
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Sex:
female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Sex:
male
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Mortality:
Male: 2000 mglkg bw; Number of animals: 5; Number of deaths: 0
Female: 2000 mglkg bw; Number of animals: 5; Number of deaths: 0
Clinical signs:
other: Neither clinical signs of toxicity nor local effects such as irritation of treated skin area were observed.
Gross pathology:
No treatment-related macroscopic findings were observed.
Interpretation of results:
not classified
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
The acute dermal toxicity LD50 on rats was found to be > 2000 mg/kg.
Executive summary:

The study was performed according to the standard method EU B.2 on Wistar rats with a single dose of 2000 mg/kg. Five animals were used per sex. The animals were treated dermally by semi-occlusive application of an aqueous suspension of the the test material. The LD50 was determined to be > 2000 mg/kg; therefore, the test item does not have any classification/labelling requirements.

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

Additional information

Justification for selection of acute toxicity – oral endpoint
Guideline study; GLP; Klimisch 1

Justification for selection of acute toxicity – dermal endpoint
Guideline study; GLP; Klimisch 1

Justification for classification or non-classification

Based on the data available the substance is not classified or labeled according to Directive 67/548/EEC (DSD) or Regulation 1272/2008/EC (CLP).