Ethylene dibenzoate

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

09 January 2017 - 14 February 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

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:

2001

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 tris (Acute Oral Toxicity - Acute Toxic Class Method)

Version / remarks:

May 2008

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 870.1100 (Acute Oral Toxicity)

Version / remarks:

2002

Deviations:

no

Test guideline 4

Qualifier:

according to guideline

Guideline:

other: Japanese Ministry of Agriculture, Forestry and Fisheries (JMAFF), 12 Nousan, Notification No 8147, November 2000, including the most recent partial revisions.

Version / remarks:

2000

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Ethylene dibenzoate

EC Number:

202-338-6

EC Name:

Ethylene dibenzoate

Cas Number:

94-49-5

Molecular formula:

C16H14O4

IUPAC Name:

2-(benzoyloxy)ethyl benzoate

Test material form:

solid: particulate/powder

Details on test material:

Appearance: white to off white powder or flakes
Storage conditions: at room temperature protected from light

Specific details on test material used for the study:

Stability at higher temperatures: stable, maximum temperature: 60°C, maximum duration: 1 hour

Test animals

Species:

rat

Strain:

other: Crl:WI (Han)

Sex:

female

Details on test animals or test system and environmental conditions:

- Source: Charles River Deutschland, Sulzfeld, Germany
- Age at study initiation: Young adult animals (approx. 9-11 weeks old)
- Weight at study initiation: 140-196 grams
- Fasting period before study: Animals were deprived of food overnight prior to dosing and until 3-4 hours after administration of the test item. Water was available ad libitum.
- Housing: Group housing of 3 animals per cage in labeled Macrolon cages containing sterilized sawdust as bedding material and paper as cage-enrichment.
- Diet: Free access to pelleted rodent diet (SM R/M-Z from SSNIFF® Spezialdiäten GmbH, Soest, Germany).
- Water: Free access to tap water.
- Acclimation period: At least 5 days before the start of the treatment, under laboratory conditions

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20.0 – 21.1
- Humidity (%): 35 - 50
- Air changes (per hr): approx 10
- Photoperiod (hrs dark / hrs light): 12/12

Deviations from the minimum level of daily mean relative humidity occurred. Hoever, laboratory historical data do not indicate an effect of the deviations and therefore it is not considered to affect the study adversely.

IN-LIFE DATES: From: 09 January 2017 to 14 February 2017

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

polyethylene glycol

Remarks:

Specific gravity: 1.125

Details on oral exposure:

GAVAGE METHOD: plastic feeding tubes, the test item preparations were stirred on a magnetic stirrer during dosing.

Frequency: single dosage, on Day 1.

VEHICLE:
- Justification for choice of vehicle: The vehicle was selected based on trial preparations performed at Charles River Den Bosch and on test item data supplied by the Sponsor. There was no information available regarding thesolubility or stability in vehicle.

MAXIMUM DOSE VOLUME APPLIED: 2000 mg/kg (10 mL/kg) body weight.

DOSAGE PREPARATION: The preparations (w/w) were kept at room temperature protected from light and were dosed within 4 hours after adding the vehicle to the test item. Homogeneity was assessed by visual inspection of the solutions and the formulations were stirred during dosing, which ensures homogeneity sufficient for these kinds of studies. Adjustment was made for specific gravity of the vehicle. No correction was made for purity of the test item. In order to obtain homogeneity, the test item (preparations) were heated in a water bath with a maximum temperature of 61.5ºC for a maximum of 33 minutes. The test item (formulations) were allowed to cool to a temperature of maximally 40ºC prior to dosing.

Doses:

2000 mg/kg body weight

No. of animals per sex per dose:

6 (2 groups of three females in a stepwise manner)

Control animals:

no

Details on study design:

- Method: The test was performed in a stepwise treatment, starting with one group of 3 females and a dose level of 2000 mg/kg bw. Based on the results, one additional group was dosed at 2000 mg/kg bw.
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing:
Mortality/Viability: twice daily
Body weights: Days 1 (pre-administration), 8 and 15
Clinical signs: At periodic intervals on the day of dosing (Day 1) and once daily thereafter, until Day 15.
- Necropsy of survivors performed: At the end of the observation period, all animals were sacrificed by oxygen/carbon dioxide procedure and subjected to necropsy. Descriptions of all internal macroscopic abnormalities were recorded.
- Other examinations performed: none.

Statistics:

No statistical analysis was performed (The method used is not intended to allow the calculation of a precise LD50 value).

Results and discussion

Effect levels

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred.

Clinical signs:

other: Hunched posture and piloerection were noted for all animals on Day 1 and/or Day 2.

Gross pathology:

No abnormalities were found at macroscopic post mortem examination of the animals.

Any other information on results incl. tables

According to the OECD 423 test guideline, the LD50 cut-off value was considered to exceed 5000 mg/kg body weight.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

In an acute oral toxicity study with rats, performed according to OECD/EC test guidelines, an LD50 >2000 mg/kg bw for Ethylene glycol dibenzoate was determined. Based on these results, Ethylene glycol dibenzoate does not meet GHS criteria for classification.

Executive summary:

In an acute oral toxicity study with rats, performed according to OECD/EC test guidelines, an LD50 >2000 mg/kg bw for Ethylene glycol dibenzoate was determined. Based on these results, Ethylene glycol dibenzoate does not meet GHS criteria for classification.