2-(2-ethoxyethoxy)ethyl acrylate

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Oct 1996 - Jan 1997

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was performed according to the relevant guidance on dermal toxicity, OECD 402.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1997

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

standard acute method

Limit test:

no

Test material

Test material information

Constituent 1

Reference substance name:

SR256, Lot# HCE0995; 2,(2-ethoxyethoxy)ethylacrylate

IUPAC Name:

SR256, Lot# HCE0995; 2,(2-ethoxyethoxy)ethylacrylate

Test material form:

other: clear colorless liquid

Details on test material:

- Lot/batch No.: HCE 0995
- Specific gravity: 1.02
- purity: 94% (GC)

Test animals

Species:

rabbit

Strain:

New Zealand White

Sex:

male/female

Details on test animals or test system and environmental conditions:

Animals were received from Ace Animals, Boyertown, PA. Following the quarantine period of at least one week, five healthy male and five non-pregnant, nulliparous, healthy female were randomly assigned to the treatment groups.The pretest body weight range was 2.0-2.5 kg for males and 2.0-2.6 kg for females. the w eight variation of the animals used did not exceed +/- 20% of the mean body weight.

Administration / exposure

Type of coverage:

occlusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

The test artice was used as received. It had been applied to the clipped site by a syringe at 1000 mg/kg bw and 2000 mg/kg bw. The doses were based upon the sample weight as calculated from the specific gravity. The test article was applied on the top of a four layered surgical gauze patch measurig 10x15cm. *Gentle pressure was applied to the gauze to aid in the distribution of the test substance over the prepared site. The torso was wrapped with plastic which was secured with non-irritating tape. The test article remained in contact with the skin for 24 hours at which time the wrappings were removed. Residual test article was removed by gentle washing with distilled water.

Duration of exposure:

24 hrs

Doses:

1000 mg/kg bw and 2000 mg/kg bw

No. of animals per sex per dose:

5

Control animals:

not required

Details on study design:

- Duration of observation period following administration: The animals were observed 1, 2 and 4 hours postdose and once daily for 14 days for toxicity and pharmacological effects. The animals were observed twice daily for 14 days for mortality. The test sites were scored for dermal irritation at 24 hrs postdose and on days 7 and 14 using the numerical Dreize scoring code.
- Frequency of weighing: Body weights were recorded pretest, weekly and at death, or termination of the survivors.
- Necropsy of survivors performed: All animals were examined for gross pathology. Abnormal tissues were preserved in 10% buffered formalin for possible future microscopic examination.

Statistics:

None: the estimate of the LD50 was made based on the survivals during the study.

Results and discussion

Effect levels

Effect levels 1

Sex:

male

Dose descriptor:

LD50

Effect level:

> 1 000 - < 2 000 mg/kg bw

Effect levels 2

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

Dose group 1000 mg/kg bw
females 0/5
males 0/5
Dose group 2000 mg/kg bw
females 1/5
males 3/5

Clinical signs:

other: Lethargy, soiling on the anogenital area, ataxia, flaccid muscle tone, emaciation, wetness of the nose/mouth and breathing difficulties.

Gross pathology:

Animals died during the study revealed abnormalities of the lungs, dosed site, liver and gastrointestinal tract as well as wetness of the nose/mouth and anogenital area, emacination and soiling of the anogenital area. Necropsy of survivors revealed abnormalities of the treated skin, kidneys, liver, lungs, intestines, peritoneal cavity and soiling of the anogenital area.

Applicant's summary and conclusion

Interpretation of results:

Toxicity Category IV

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The LD50 is greater than 2000 mg/kg body weight for female rabbits
The LD50 is in the range of 1000 - 2000 mg/kg bw for male rabbits.
Fullfil the criteria for classification as Acute Tox 4; H312

Executive summary:

An OECD 402 study was perfomed with rabbits (5 males, 5 females) at dose levels of 1000 mg/kg bw and 2000 mg/kg bw.

The LD50 was greater than 2000 mg/kg body weight for female rabbits

The LD50 was in the range of 1000 - 2000 mg/kg bw for male rabbits.

The LD50 value for male rabbits fullfils the criteria for classification as Acute Tox 4; H312.