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Toxicological information

Acute Toxicity: dermal

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Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report date:
2011

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
GLP compliance:
yes (incl. QA statement)
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Pitch, coal tar, high-temp.
EC Number:
266-028-2
EC Name:
Pitch, coal tar, high-temp.
Cas Number:
65996-93-2
Molecular formula:
not applicable
IUPAC Name:
Pitch, coal tar, high-temp.
Test material form:
solid
Details on test material:
pitch, coal tar, high-temp.; CCSG composite sample no. 8 (ATE 10444)
- Substance type: organic
- State of aggregation: bulk solid
- Density: ca. 1.32 g/cm³ (composite sample)
1.15 - 1.4 g/cm³ (typical range for coal-tar pitch)
- Composition of test material, percentage of components: 100 % (UVCB substance)
Specific details on test material used for the study:
- Name of test material (as cited in study report): coal tar pitch
- Substance type: organic
- Lot/batch No.: A-10063A
- Expiration date of the lot/batch: 24 Sep. 2011
- Stability under test conditions: stable
- Storage condition of test material: room temperature in the dark

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Charles River, Germany
- Age at study initiation: 10 - 12 weeks
- Weight at study initiation: males: 281 - 308 g; females: 191 - 203 g
- Fasting period before study:
- Housing: Makrolon cages, individually
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: at least 5 d

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 21 +-3
- Humidity (%): 40 - 70 %
- Air changes (per hr): approx. 15
- Photoperiod (hrs dark / hrs light): 12 / 12

Administration / exposure

Type of coverage:
occlusive
Vehicle:
unchanged (no vehicle)
Details on dermal exposure:
TEST SITE
- Area of exposure: approx. 10 % of total body surface (males: ~25 cm²; females: ~18 cm²)
- Type of wrap if used: surgical gauze (Surgy 1D), covered with aluminum foil and Coban elastic bandage

REMOVAL OF TEST SUBSTANCE
- Washing (if done): yes
- Time after start of exposure: 24 h

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg bw
Duration of exposure:
24 h
Doses:
2000 mg/kg bw
No. of animals per sex per dose:
5
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: 2x daily for clinical observation, day 1, 8 and 15 for body weight
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight
Statistics:
not applicable

Results and discussion

Effect levelsopen allclose all
Sex:
male/female
Dose descriptor:
LD0
Effect level:
2 000 mg/kg bw
Based on:
test mat.
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Mortality:
no
Clinical signs:
Black and yellow staining of fur and the treated skin area, 3 cases of bloody nasal, ocular discharge (chromodacryorrhoea, snout), the latter not treatment related (stress symptom).
Body weight:
normal
Gross pathology:
no particular findings

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met