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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
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:
2007
Report date:
2007

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EPA OPPTS 870.2500 (Acute Dermal Irritation)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: MAFF Japan Agricultural Chemicals Regulation Laws Notification 12 Nousan 8147 (2000)
Deviations:
no
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
methyl (E)-3-methoxy-2-{2-[6-(trifluoromethyl)pyridin-2-yloxymethyl]phenyl}acrylate
EC Number:
601-478-9
Cas Number:
117428-22-5
Molecular formula:
C18H16F3NO4
IUPAC Name:
methyl (E)-3-methoxy-2-{2-[6-(trifluoromethyl)pyridin-2-yloxymethyl]phenyl}acrylate
Test material form:
solid
Details on test material:
Purity: 99.66%

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Covance Research Products, Denver, Pennsylvania.
- Weight at study initiation: 3003 to 3583 g
- Housing: All animals were housed singly in stainless steel, wire-mesh cages suspended above cage boards.
- Diet: Approximately 125 grams/day
- Water: ad libitum
- Acclimation period: At least 7 days

ENVIRONMENTAL CONDITIONS
- Temperature: 16-22°C
- Humidity: 30-70%
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Type of coverage:
semiocclusive
Preparation of test site:
shaved
Vehicle:
other: Deionized water
Controls:
no
Amount / concentration applied:
TEST MATERIAL
- Amount applied: Approximately 0.5 g of the test substance, moistened with 0.3 mL of deionized water to form a thick paste, was applied to the test site
Duration of treatment / exposure:
4 hours
Observation period:
72 hours
Number of animals:
3 (males)
Details on study design:
TEST SITE
- Area of exposure: Approximately 6 cm²
- Type of wrap if used: The 2-ply gauze pad was held in place with non-irritating tape. The trunk of each rabbit was wrapped with porous tape. The tape was further secured with waterproof tape.

REMOVAL OF TEST SUBSTANCE
- Washing: Yes, with warm water
- Time after start of exposure: Approximately 4 hours

OBSERVATION TIME POINTS
Test sites were evaluated by Draize for signs of dermal irritation approximately 60 minutes, and 24, 48, and 72 hours after test substance removal.

SCORING SYSTEM:
- Method of calculation: Draize Scale for Scoring Skin Irritation, 1959

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
mean
Time point:
24/48/72 h
Score:
0
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
mean
Time point:
24/48/72 h
Score:
0
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
The rabbits exhibited no dermal irritation during the study.
Other effects:
No clinical signs of toxicity were observed, and no biologically important body weight loss occurred.

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
Non irritant
Executive summary:

The test substance was applied as a single 0.5-g dermal dose to the shaved intact skin of a single New Zealand White rabbit. Since no corrosion occurred, 2 additional rabbits were treated. The test substance, moistened with 0.3 mL of deionized water, was applied to a 6 cm² area of skin. The application area was covered with a 2-ply gauze square which was held in place with non-irritating tape and covered with porous tape for a semi-occlusive dressing. The rabbits were exposed to the test substance for 4 hours after which the test substance was removed. Test sites were evaluated by Draize for signs of dermal irritation approximately 60 minutes, and 24, 48, and 72 hours after test substance removal. The rabbit that was initially treated was also examined immediately after test substance removal.

The rabbits exhibited no dermal irritation during the study. No clinical signs of toxicity were observed, and no biologically important body weight loss occurred.