(2-(2-hydroxyethoxy)ethyl) oxo(phenyl)acetate;reaction mass of: 2-(2-((oxo(phenyl)acetyl)oxy)ethoxy)ethyl oxo(phenyl)acetate

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2001-10 to 2002-05-22

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2002

Report date:

2002

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 423 (Acute Oral toxicity - Acute Toxic Class Method)

Version / remarks:

adopted 22 March 1996

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 (Acute Toxicity (Oral))

GLP compliance:

yes (incl. QA statement)

Remarks:

Safepharm Laboratories Limited P.O. Box No. 45 DERBY DEI2BT U.K.

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

-

EC Number:

442-300-8

EC Name:

-

IUPAC Name:

2-(2-hydroxyethoxy)ethyl 2-oxo-2-phenylacetate; 2-{2-[(2-oxo-2-phenylacetyl)oxy]ethoxy}ethyl 2-oxo-2-phenylacetate

Details on test material:

- State of aggregation: liquid

Specific details on test material used for the study:

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature, in the dark

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River (UK) Ltd, Margate, Kent, UK
- Age at study initiation: approximately eight weeks
- Weight at study initiation: at least 200 g
- Fasting period before study: overnight
- Housing: in groups of three by sex in solid-floor polypropylene cages finnished with woodflakes
- Diet: Certified Rat and Mouse Diet (Code 5LF2) supplied by PMI Nutrition International, ad libitum
- Water: ad libitum
- Acclimation period: at least five days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 to 25°C
- Humidity (%): 30 -70
- Air changes (per hr): 15
- Photoperiod (hrs dark / hrs light): 12/12

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 1.64 mL/kg

For the purpose of the study the test material was used as supplied. The specific gravity was determined and used to calculate the appropriate dose volume for the required dose level. All animals were dosed once only by gavage, using a metal cannula attached to a graduated syringe. The volume administered to each animal was calculated according to the fasted bodyweight at the time of dosing.

Doses:

2000 mg/kg

No. of animals per sex per dose:

3

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: oberservations: 0.5, 1, 2 and 4 hours after dosing and subsequently once daily for fourteen days; body weights were recorded on days 0, 7 and 14.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

There were no deaths.

Clinical signs:

other: There were no signs of systemic toxicity.

Gross pathology:

No abnormalities were noted at necropsy.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The acute oral median lethal dose (LD50) of the test material in the Sprague-Dawley CD (Cri: CD® (SD) IGS BR) strain rat was estimated as being greater than 2000 mg/kg bodyweight.

Executive summary:

A GLP compliant study according to OECD guideline 423 and according to Method B1 of the Commission Directive 96/54/EC was performed to assess the acute oral toxicity of the test material following a single oral administration in the Sprague-Dawley CD (Cri: CD® (SD) IGS BR) strain rat. A group of three fasted females was treated with the test material at a dose level of 2000 mg/kg bodyweight. This was followed by a group of three fasted males at the same dose level. The test material was administered orally and undiluted. Clinical signs and bodyweight development were monitored during the study. All animals were subjected to gross necropsy. There were no deaths and no signs of systemic toxicity. All animals showed expected gains in bodyweight over the study period. No abnormalities were noted at necropsy. In conclusion, The acute oral median lethal dose (LD50) of the test material in the Sprague-Dawley CD (Cri: CD® (SD) IGS BR) strain rat was estimated as being greater than 2000 mg/kg bodyweight.