1,4-Methanonaphthalen-5(1H)-one, 9-(dichloromethylene)-2,3,4,6,7,8-hexahydro-, oxime, (5E)-

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2011-04-19 to 2011-05-12 (experimental phase)

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Report date:

2011

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Version / remarks:

adopted February 24, 1987

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Version / remarks:

from May 31, 2008

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1200 (Acute Dermal Toxicity)

Version / remarks:

from August 1998

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

N-[(3E)-11-(dichloromethylidene)tricyclo[6.2.1.0²,⁷]undec-2(7)-en-3-ylidene]hydroxylamine

EC Number:

700-700-2

Cas Number:

1369492-55-6

Molecular formula:

C12H13Cl2NO

IUPAC Name:

N-[(3E)-11-(dichloromethylidene)tricyclo[6.2.1.0²,⁷]undec-2(7)-en-3-ylidene]hydroxylamine

Details on test material:

- Physical state: solid
- Stability under test conditions: not reported
- Storage condition of test material: At room temperature at about 20 °C

Test animals

Species:

rat

Strain:

other: RccHan: WIST(SPF)

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Age at study initiation: males: 9 weeks, females: 11 weeks
- Weight at study initiation: males: 244.1 g - 259.6.g, females: 190.6 g - 212.2 g
- Fasting period before study: No
- Housing: During acclimatization in groups of five per sex in Makrolon type-4 cages with standard softwood bedding, including paper enrichment. Individually in Makrolon type-3 cages and under similar conditions during treatment and observation.
- Diet (e.g. ad libitum): Pelleted Rat-Mouse Diet ad libitum.
- Water (e.g. ad libitum): Community tap water ad libitum.
- Acclimation period: At least 5 days, under laboratory conditions and 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:

TEST SITE
- Area of exposure: backs of the animals
- Type of wrap if used: The patch was covered with a semi-occlusive dressing. The dressing was wrapped around the abdomen and fixed with an elastic adhesive bandage.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): washed with lukewarm tap water and dried with disposable paper towels
- Time after start of exposure: 24 hours

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 2000 mg/kg body weight
- Constant volume or concentration used: not applicable (only 1 concentration)
- For solids, paste formed: yes

VEHICLE
- Amount(s) applied (volume or weight with unit):The test item was moistened with purified water before application to obtain a dry paste.

Duration of exposure:

24 hours

Doses:

2000 mg/kg body weight (applied by weight as supplied by the Sponsor)

No. of animals per sex per dose:

group 1: 1 male, 1 female (Animal no. 1 and 2, treated 2 days before the other rats)
group 2: 4 males, 4 females

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: The animals were examined daily during acclimatization and mortality and clinical signs were assessed. All animals were examined for clinical signs before treatment, once within the first 30 minutes and approximately 1, 2, 3 and 5 hours after treatment on test day 1 and once daily during test days 2 to 15. Local dermal signs were assessed once daily from test day 2 to 15. Mortality was assessed before treatment, once within the first 30 minutes and approximately 1, 2, 3 and 5 hours after treatment on test day 1 (with the clinical signs) and
twice daily during days 2 to15. Body weights were recorded on test day 1 (prior to administration) and on test days 8 and 15.
- Necropsy of survivors performed: yes
- Other examinations performed: mortality, clinical signs, local dermal signs, body weight, macroscopy

Results and discussion

Preliminary study:

2 rats (1 male (animal no. 1), 1 female (animal no. 2)) were treated 2 days before the other rats. The findings for these were:

- no deaths, no clinical signs, no macroscopic findings
- body weights within commonly recorded range
- focal crusts on test days 4 to 6 in male rat

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 course of the study.

Clinical signs:

other: No clinical signs were observed during the course of the study.

Gross pathology:

No macroscopic findings were recorded at necropsy.

Other findings:

Local dermal signs: One male (animal no. 1) showed focal crusts on test days 4 to 6 and one female (animal no. 8) showed desquamation on test days 7 to 10. No local dermal signs were recorded in these animals after test day 10 and no local dermal signs were recorded in any other animal.

Any other information on results incl. tables

Local Dermal Signs

Animal no./sex	Dose [mg/kg]	Local dermal signs (max grade)*	Test day
			2	3	4	5	6	7	8	9	10	11	12	13	14	15
1 / M	2000	Focal crusts	.	.	1	1	1	.	.	.	.	.	.	.	.	.
1 / F	2000	No abnormality recorded.
2 / M	2000	No abnormality recorded.
3 / M	2000	No abnormality recorded.
4 / M	2000	No abnormality recorded.
5 / M	2000	No abnormality recorded.
6 / F	2000	No abnormality recorded.
7 / F	2000	No abnormality recorded.
8 / F	2000	Desquamation	.	.	.	.	.	1	1	1	.	.	.	.	.	.
9 / F	2000	No abnormality recorded.
10 / F	2000	No abnormality recorded.

* Local dermal signs were assessed according to Draize

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The median lethal dose (LD50) of the test item after single dermal administration to rats of both sexes, observed over a period of 14 days, is greater than 2000 mg/kg body weight. The study is considered to be adequate and reliable.

Executive summary:

In an acute dermal toxicity test performed under GLP according to OECD TG 402, 5 male and 5 female RccHan:WIST (SPF) rats were treated with the test item at a dose level of 2000 mg/kg by dermal application. The test item was applied by weight as supplied by the Sponsor. For better dermal contact, the test item was moistened with purified water before application.

All animals were examined for clinical signs before treatment, once within the first 30 minutes and approximately 1, 2, 3 and 5 hours after treatment on test day 1 and once daily during test days 2 to 15. Local dermal signs were assessed once daily from test day 2 to 15. Mortality was assessed before treatment, once within the first 30 minutes and approximately 1, 2, 3 and 5 hours after treatment on test day 1 (with the clinical signs) and twice daily during test days 2 to15. Body weights were recorded on test day 1 (prior to administration) and on test days 8 and 15. All animals were examined macroscopically after being sacrificed at the end of the study.

No deaths occurred during the course of the study and no clinical signs were observed. One male showed focal crusts on test days 4 to 6 and one female showed desquamation on test days 7 to 10. No local dermal signs were recorded in these animals after test day 10 and no local dermal signs were recorded in any other animal. Two females slightly lost body weight after treatment (4% and 6 %, respectively). The body weights of the other animals were within the range commonly recorded for this strain and age. No macroscopic findings were recorded at necropsy.

The median lethal dose (LD50) of the test item after single dermal administration to rats of both sexes, observed over a period of 14 days, is greater than 2000 mg/kg body weight.