Sodium 4-ethoxycarbonylphenoxide

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Aug - Sept 1982

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Well reported study, performance equivalent to OECD Guideline 401 with some minor restrictions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1982

Report date:

1982

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 401 (Acute Oral Toxicity)

Deviations:

yes

Remarks:

Necropsy was not performed in all surviving animals

GLP compliance:

not specified

Test type:

standard acute method

Limit test:

no

Test material

Test material information

Constituent 1

Reference substance name:

Sodium 4-ethoxycarbonylphenoxide

EC Number:

252-487-6

EC Name:

Sodium 4-ethoxycarbonylphenoxide

Cas Number:

35285-68-8

Molecular formula:

C9H10O3.Na

IUPAC Name:

sodium 4-ethoxycarbonylphenoxide

Test material form:

other: solid

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Winkelmann, Borchen, Germany
- Age at study initiation: 9 - 14 weeks
- Weight at study initiation: 170 g (males), 167 g (females)
- Fasting period before study: Animals were fasted from 16 h before application until 4 h after application. During this period tap water was available.
- Housing: Groups of five animals were housed in Makrolon cages type III with dustfree wood pellets as bedding material.
- Diet: Altromin R 1324, Altromin GmbH, Germany, ad libitum
- Water: tap water, ad libitum

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 ± 1,5
- Humidity (%): 60 ± 5
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

other: Lutrol

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 20 mL/kg bw

Doses:

1000, 3100 or 5000 mg/kg bw

No. of animals per sex per dose:

5

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 d
- Frequency of observations and weighing: Animals were periodically observed for clinical signs on the treatment day and twice daily thereafter until the end of the observation period. Body weights were recorded right before application and weekly thereafter.
- Necropsy of survivors performed: yes, on a random basis
- Other examinations performed: clinical signs

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

3 100 mg/kg bw

Remarks on result:

other: 5/10 animal died at 3100 mg/kg bw (2 males and 3 females)

Mortality:

No mortality occurred in the 1000 mg/kg bw group. In the 3100 mg/kg bw group, 2/5 males and 3/5 females died during the first 2 days after application of the test substance. In the 5000 mg/kg bw group, 4/5 males and 4/5 females were found dead during the first 4 hours after application of the test substance.

Clinical signs:

other: Clinical signs were observed in all dose groups. The general condition of all animals was decreased and they layed down in side or prone position and showed signs of sedation and anaesthesia. These symptoms were fully reversible within 2 days.

Gross pathology:

Necropsy of surviving animals on a radom basis revealed no substance-related findings. No necropsy or histopahological examination was done in the animals that died during the observation period.

Applicant's summary and conclusion

Interpretation of results:

not classified

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The median lethal dose of the test substance (LD50) was 3100 mg per kg body weight. Based on the result of this study the substance is not subject for labelling and classification requirements according to regulatory requirements.

Executive summary:

The test item was tested for its acute oral toxicity potential. 5 male and 5 female rats were treated with doses of 1000, 3100 or 5000 mg/kg bw and observed for 14 days.

The median lethal dose of test item (LD50) was 3100 mg per kg body weight. Based on the result of this study the test substance is not subject for labelling and classification according to regulatory requirements.