2-phenoxyethyl methacrylate

Endpoint summary

Description of key information

No data is available on 2-phenoxyethyl methacrylate.

The available studies on acute oral and acute dermal toxicity of 2-phenoxyethyl acrylate (S1) show that the substance has low acute toxicity with an oral LD50 in rats > 5000 mg/kg, and low dermal toxicity with an dermal LD50 in rats > 2000 mg/kg bw. These values are considered relevant for 2-phenoxyethyl methacrylate (T) as well.

No data is available on inhalation toxicity on neither2-phenoxyethyl methacrylate nor 2-phenoxyethyl acrylate.

See further read-across justification in document attached in section 13.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Reference 1

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Qualifier:

according to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Deviations:

yes

Remarks:

two doses were used

Principles of method if other than guideline:

14 days acut toxicity study with one oral exposure, two doses 2150 and 5000 mg/kg.

GLP compliance:

no

Test type:

standard acute method

Limit test:

no

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

5 males and 5 females per concentration, approximately 12 weeks at start. At least one week acclimatization.
Food; SSNIFF R; FA.SSNIFF, Versuchstierdiaeten; 4470 Soest

Route of administration:

oral: gavage

Vehicle:

olive oil

No. of animals per sex per dose:

5

Control animals:

no

Key result

Sex:

female

Dose descriptor:

LD0

Effect level:

5 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality was observed

Clinical signs:

other: At highest dose, 5000 mg/kg bw; Dyspnea, staggering and overall bad condition were observed after one hour and untill 2 days. Shaggy fur was observed between 1 and 13 days. Apathy, anormalous behavior, signs of pain, spastic walking, redness of skin, dry

Interpretation of results:

sligthly toxic

Remarks:

Migrated information

Conclusions:

No mortality were observed in any of the two doses tested. The acute LD50 value is therefore above 5000 mg/kg

Executive summary:

The acute toxicity of phenoxyethyl acrylate was tested in a single dose acute toxicity test, comparable to OECD Guideline 401. Two doses were tested 2150 and 5000 mg/kg. The substance was giving orally dissolved in olive oil, total volume was 5 and 10 ml/kg bw, which is acceptable according to the OECD guideline. Several clinical signs were observed, such as dyspnoea, shaggering, shaggy fur, redness of skin and hemi paralysis. The symptoms gradually ceased within hours to two days, except shaggy fur in the highest dose. No mortality was observed at any of the doses, therefore the acute LD50 value is above 5000 mg/kg.

Reference 2

Endpoint:

acute toxicity: oral

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

Read-across from acute oral toxicity study on one closely structural and physicochemical related substance: 2-Phenoxyethyl acrylate.
For further read-across justification se document attached in section 13.

Reason / purpose for cross-reference:

read-across source

Key result

Sex:

female

Dose descriptor:

LD0

Effect level:

5 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: data on read-across substance

Executive summary:

No data is available for 2-Phenoxyethyl methacrylate (T).

LD50 was determined to be above 5000 mg/kg in an acute oral toxicity study with exposure of rats to 2 -phenoxyethyl acrylate (S1) in accordance with OECD Guideline study 401. Due to the close chemical similarity to 2-phenoxyethyl methacrylate this value may be considered relevant for this substances as well.

See justification for read-across attached in section 13.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

discriminating dose

Value:

5 000 mg/kg bw

Acute toxicity: via inhalation route

Link to relevant study records

Reference

Endpoint:

acute toxicity: inhalation

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Link to relevant study records

Reference

Reference 1

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study was performed according to the relevant guideline under GLP conditions, inclusive certificate

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

Male and female rats obtained from Harlan Olac Ltd, Bicester Oxon, England.
Rats were housed individually in metal cages with wiremesh floor. Standard rodent diet and water were provided ad libitum.
Temperature was 21C, relative humidity was 50-51%, and 12:12 light:dark period.

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

Five males and five females were treated. The day before treatment, the hair was removed from the dorso-lumbar region, approximately 10% of bodysurface (5*5 cm). The test substance was applied, by spreading it evenly, and then covered by gauze, and kept in place with a non-irritative dressing, encircled firmly around the trunk.

Duration of exposure:

24 hours

Doses:

2.0 g/kg

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

observation period of 14 days post exposure

Key result

Sex:

male/female

Dose descriptor:

LD0

Effect level:

2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality was observed during the experiment

Clinical signs:

other: No signs of systemic reactions to treatment

Gross pathology:

No macroscopic abnormalities onserved at day 15

Other findings:

Slight or well-defined erythema was observed at the site of application, for two male and three female rats on day 2. No other dermal changes and irritation has resolved at day 3.

Interpretation of results:

relatively harmless

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The substance can not be considered acutely toxic via the dermal route.

Executive summary:

Rats of both sexes were given 2 g/kg as a single dermal exposure and followed 14 days after exposure.

No mortality was observed . I addition no clinical signs nor macroscopic abnormalities were observed. A slight or well defined erythema was observed at the site of application for 2 and 3 male and females rats on day 2, respectively. No other dermal changes was observed, and irritation had resolved at day 3.

The substance can not be considered acutely toxic via the dermal route.

Reference 2

Endpoint:

acute toxicity: dermal

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

Read-across from acute dermal toxicity study on one closely structural and physicochemical related substance: 2-Phenoxyethyl acrylate.
For further read-across justification se document attached in section 13.

Reason / purpose for cross-reference:

read-across source

Key result

Sex:

male/female

Dose descriptor:

LD0

Effect level:

2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: Data on read-across substance

Executive summary:

No data is available on 2-Phenoxyethyl methacrylate (T).

The available studies on acute toxicity of 2-phenoxyethyl acrylate (S1) show that the substance has low acute toxicity with LD50 in rats > 2000 mg/kg bw .Due to very close structural similarity this value is considered relevant for 2-phenoxyethyl methacrylate as well.

See justification for read-across attached in section 13.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Additional information

The available studies on acute toxicity of 2-phenoxyethyl acrylate show that the substance has low acute toxicity. No mortality was observed in the studies available (oral and dermal). In the oral toxicity study using single dose levels of 2150 and 5000 mg/kg, several clinical signs of toxicity were observed including dyspnoea, shaggering, shaggy fur, redness of skin and hemi paralysis. The symptoms gradually ceased within hours to two days except for the highest dose level. In the dermal toxicity study, rats were given 2000 mg/kg as a single dermal exposure. Neither clinical signs nor macroscopic abnormalities were observed. A slight or well defined erythema was observed at the site of application on day 2. No other dermal changes were observed and irritation had resolved at day 3.

Overall, 2-phenoxyethyl acrylate demonstrates a low acute oral and dermal toxicity. No inhalation study is available.

Justification for selection of acute toxicity – oral endpoint
The study is an OECD Guideline 401 study

Justification for selection of acute toxicity – inhalation endpoint
No inhaltion study available. Annex VIII requirement for second exposure route is fulfilled as both an acute oral and an acute dermal expossure study is availabe.

Justification for selection of acute toxicity – dermal endpoint
The study was performed according to EU Method B 3, under GLP conditions

Justification for classification or non-classification

The available data on acute toxicity indicate that 2-phenoxyethyl acrylate should not be classified as acute toxic.

Due to very close structural similarity to 2-phenoxyethyl methacrylate, this substance should not be classified for acute toxicity.