1,4-bis(2,3-epoxypropoxy)butane

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1988

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Well documented, according to accepted guidelines

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1988

Report date:

1988

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 404 (Acute Dermal Irritation / Corrosion)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)

Deviations:

no

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

1,4-bis(2,3-epoxypropoxy)butane

EC Number:

219-371-7

EC Name:

1,4-bis(2,3-epoxypropoxy)butane

Cas Number:

2425-79-8

Molecular formula:

not applicable, UVCB

IUPAC Name:

N,N-dimethylacetamide

Test material form:

liquid

Details on test material:

- Name of test material (as cited in study report): 1,4-Butanedioldiglycidylether (BDDGE)
- Physical state: liquid
- Analytical purity: not reported
- Lot/batch No.: DC 1294.2

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Kleintierfarm Madoerin AG, CH 4414 Fuellinsdorf/Switzerland
- Age at study initiation: males: 14 weeks, female: 15 weeks
- Weight at study initiation: males: 2.6 kg, female: 2.5 kg
- Housing: Individually in stainless steel cages equipped with an automatic cleaning and drinking system
- Diet (e.g. ad libitum): Pelleted standard Kliba 341, Batch 36/88 rabbit maintenance diet ("Kliba", Klingentalmuehle AG, 4303 Kaiseraugst, Switzerland) ad libitum
- Water (e.g. ad libitum): Community tap water from Itingen, ad libitum
- Acclimation period: Four days under test conditions after veterinary examination


ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 ±3 °C
- Humidity (%): 40 - 70%
- Air changes (per hr): 10 - 15
- Photoperiod (hrs dark / hrs light): 12/12

Test system

Type of coverage:

semiocclusive

Preparation of test site:

shaved

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 mL

Duration of treatment / exposure:

4 hours

Observation period:

The skin reaction was assessed at 1, 24, 48 and 72 hours intervals after the removal of the dressing, gauze patch and test article

Number of animals:

3

Details on study design:

Approximately 24 hours before treatment, the dorsal fur was shaved with an electric clipper, exposing an area of approximately 100 square centimeters (10 cm x 10 cm). On test day 1, 0.5 ml of the test article was applied to the intact skin of the shaved area. It was covered with a 3.0 cm x 3.0 cm patch of surgical gauze. The gauze was covered with a semi-occlusive dressing. The dressing was wrapped around the abdomen and anchored with an elastic bandage. The duration of treatment was 4 hours.

Four hours after the application, the dressing was removed and the skin was flushed with lukewarm tap water. The skin reaction was assessed according to the OECD Guidelines for Testing of Chemicals, Section 4, number 404. The skin reaction was assessed at 1, 24, 48 and 72 hours intervals after the removal of the dressing, gauze patch and test article. The corrosive properties of the test article and the staining of the treated skin area related to the test article were described and recorded.

The following numerical scoring system was used to grade the skin lesions:

EVALUATION OF SKIN REACT ION

ERYTHEMA AND ESCHAR FORMATION
No erythema 0
Very slight erythema (barely perceptible) 1
Well defined erythema 2
Moderate to severe erythema 3
Severe erythema (beet redness) to slight eschar
formation (injuries in depth) 4

Maximum possible score 4

EDEMA FORMATION
No edema 0
Very slight edema (barely perceptible) 1
Slight edema (edges of area well defined by
definite raising) 2
Moderate edema (raised approximately 1 mm) 3
Severe edema (raised more than 1 mm and
extending beyond area of exposure) 4

Maximum possible score 4

Maximum cumulative score - 8
erythema score - 4
edema score - 4

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 2

Irritation parameter:

edema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 3

Irritation parameter:

erythema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 4

Irritation parameter:

edema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 5

Irritation parameter:

erythema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Results 6

Irritation parameter:

edema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

0

Max. score:

4

Reversibility:

other: not applicable

Irritant / corrosive response data:

See attached table

Applicant's summary and conclusion

Interpretation of results:

other: Not classified

Remarks:

Criteria used for interpretation of results: other: CLP (EC 1272/2008)

Conclusions:

Under the conditions of this experiment, the test substance 1,4-Butanedioldiglycidylether (BDDGE) was found to cause no primary irritation (score of 0.00) when applied undiluted to intact rabbit skin. No corrosive effect had occurred on the skin at any measuring interval.