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Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14 June 2006 to 09 August 2006
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report date:
2006

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
EU Method B.3 (Acute Toxicity (Dermal))
GLP compliance:
yes (incl. QA statement)
Remarks:
RCC Ltd., 4452 Itingen, Switzerland
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder
Details on test material:
- Name of test material (as cited in study report): FAT 40826/A
- Lot/batch No.: TZ 5604 BOP 01/06
- Expiration date: 1 February 2011
- Purity: Content of organic part (Na-salt): approx. 78%. Oligomers: 13%. Main component: approx. 48%.
- Stability of test item: Stable under storage conditions
- Stability of test item dilution: Stable in water for at least 7 days at room temperature.
- Storage conditions: At room temperature (range of 20 ± 5 °C) in a exsiccator, light protected.
Specific details on test material used for the study:
Identity: FAT 40826/A
Batch no.: TZ 5604 BOP 01/06
Expiration date: February 01, 2011
Purity: Content of organic part (Na-salt): approx. 78 %; Oligomers: 13 %; Main component: approx. 48 %
Solubility in water: Approx. >50 g/L at room temperature
Stability in water: Max. 7 days at room temperature
pH: 7.6 (1 g/L)
Aggregate state/physical form at room temperature: Solid (orange powder)
Storage conditions: At room temperature at about 20 °C, away from direct sunlight
Specific instructions: Store in desiccator

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: RCC Ltd, Laboratory Animal Services, CH-4414 Füllinsdorf / Switzerland
- Age when treated: males: 7-8 weeks, females: 12-13 weeks
- Housing: During acclimatization in groups of five per sex in Makrolon type-4 cages with standard softwood bedding. lndividually in Makrolon type-3 cages with standard softwood beddlng ('Lignocel', Schill AG, CH-4132 Muttenz) during treatment and observation.
- Diet: Pelleted standard Provimi Kliba 3433 rat/mouse maintenance diet, batch no. 001/06 (Provimi Kliba AG, CH-4303 Kaiseraugst/Switzerland), ad libitum,
- Water: Community tap water from Füllinsdorf, ad libitum.
- Acclimation period: Under laboratory conditions, after health examination.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22±3
- Humidity (%): 30-70
- Air changes (per hr): 10-15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Type of coverage:
semiocclusive
Vehicle:
water
Details on dermal exposure:
One day before treatment, the backs of the animals were clipped with an electric clipper, exposing an area of approximately 10 % of the total body surface. Only those animals without injury or irritation on the skin were used in the test. On test day 1, the test item was applied at a dose of 2000 mg/kg body weight evenly on the intact skin with a syringe and covered with a semi-occlusive dressing. The dressing was wrapped around the abdomen and fixed with an elastic adhesive bandage. Application volume/kg body weight: 6 mL. 24 hours after the application the dressing was removed and the skin was flushed with lukewarm tap water and dried with disposable paper towels. Thereafter, the reaction sites were assessed. The fur of all animals was shaved on test days 9 just after the assessment of the reaction to facilitate the skin reading for the next day.
Duration of exposure:
24 h
Doses:
2000 mg/kg body weight
No. of animals per sex per dose:
5/sex/dose
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Mortality/Viability: Daily during the acclimatization period, during the first 30 minutes and at approximately 1, 2, 3 and 5 hours after administration on test day 1 (with the clinical signs) and twice daily during days 2-15. Body weights: On test days 1 (prior to administration), 8 and 15. Clinical signs: Daily during the acclimatization period, during the first 30 minutes and at approximately 1, 2, 3 and 5 hours after administration on test day 1. Once daily during days 2-15. Local signs: Once daily during days 2-15. All abnormalities were recorded.
- Necropsy of survivors performed: All animals were killed at the end of the observation period by carbon dioxide asphyxiation and discarded after macroscopic examinations were performed. No organs or tissues were retained.
Statistics:
No statistical analysis was used.

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Mortality:
No deaths occurred during the study.
Clinical signs:
other: No systemic signs of toxicity were observed during the study period. Orange red staining of the treated skin area produced by the test item was noted in all animals on test day 2 after removal of the dressing and on test day 3 and persisted until test day
Gross pathology:
No macroscopic findings were observed at necropsy.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The acute median lethal dose (LD50) of FAT 40826/A is greater than 2000 mg/kg bw.
Executive summary:

In a GLP-compliant dermal toxicity study, performed according to OECD guideline 402, five male and five female Wistar rats were treated with FAT 40826/A at 2000 mg/kg by dermal application. The test item was diluted in vehicle (purified water) at a concentration of 0.333 g/mL and administered at a volume dosage of 6 ml/kg. The application period was 24 hours. The animals were examined daily during the acclimatization period and mortality, viability and clinical signs were recorded. All animals were examined for clinical signs at approximately 30 minutes, 1,2,3 and 5 hours after treatment on day 1 and once daily during test days 2-15. Local signs were noted once daily from test day 2 to 15. Mortality/viability was recorded at approximately 30 minutes, 1,2,3 and 5 hours after administration on test day 1 (with the clinical signs) and twice daily during days 2-15. Body weights were recorded on day 1 (prior to administration) and on days 8 and 15. All animals were necropsied and examined macroscopically. No deaths occurred during the study. Orange red staining of the treated skin area produced by the test item was noted in all animals on test day 2 after removal of the dressing and on test day 3 and persisted until test day 4, 5 and 11. The body weight of the animals was within the range commonly recorded for this strain and age. No macroscopic findings were observed at necropsy. Based on the study results, the median lethal dose (LD50) of FAT 40826/A after single dermal administration to rats of both sexes, observed over a period of 14 days is greater than 2000 mg/kg body weight.