3,5-bis(2,4-dimethylcyclohex-3-en-1-yl)polyheterocycle

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

The study was performed between 27 July 2010 and 19 August 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS:
Animals: Rat, RccHan: WIST(SPF)
Rationale: Recognized by international guidelines as a recommended test system.
Breeder: Harlan Laboratories B.V., Kreuzelweg 53, 5961 NM Horst / The Netherlands
Number of Animals per Group: Group 1: 3 females, Group 2: 3 males
Total Number of Animals: 6
Age (when treated): Females: 14 weeks, Males: 12 weeks
Body Weight Range (when treated): Females: 200.8 g – 221.6 g, Males: 344.5 g – 360.9 g
Identification: Unique cage number and corresponding color-coded spots on the tail. The animals were marked at acclimatization start.
Randomization: Selected by hand at time of delivery. No computer generated randomization program.
Acclimatization: 7 (Group 1) or 9 (Group 2) days under laboratory conditions, after health examination. Only animals without any visible signs of illness were used for the study.

ENVIRONMENTAL CONDITIONS:
Conditions: Standard Laboratory Conditions. Air-conditioned with 10-15 air changes per hour, and continuously monitored environment with a room temperature of 22 ± 3 °C and a relative humidity between 30-70%, automatically controlled light cycle of 12 hours light and 12 hours dark and music played during the daytime light period.
Accommodation: In groups of three in Makrolon type-4 cages with wire mesh tops and standard softwood bedding (‘Lignocel’ J. Rettenmaier&Söhne GmbH&CoKG, 73494 Rosenberg / Germany, imported by Provimi Kliba AG, 4303 Kaiseraugst / Switzerland), including paper enrichment, batch no. -67 (Envirodri from Lillico, Biotechnology, Surrey / UK).
Diet: Pelleted Teklad Rat-Mouse Diet 2914C, batch no. 20/10 (provided by Provimi Kliba AG, 4303 Kaiseraugst / Switzerland) ad libitum (except for the overnight fasting period prior to oral administration and approximately 3-4 hours post dose). Results of analyses for contaminants were archived at Harlan Laboratories Ltd.
Water: Community tap water from Füllinsdorf ad libitum. Results of bacteriological, chemical and contaminant analyses are archived at Harlan Laboratories Ltd.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

polyethylene glycol

Remarks:

The vehicle was chosen after a non-GLP solubility trial which was performed before the study initiation date. According to the Sponsor’s specification, the test item was not stable in water. Therefore, polyethylenglycol 300 (PEG 300) was identified as sui

Details on oral exposure:

PREPARATION OF DOSE FORMULATIONS:
Dose levels are in terms of the test item as supplied by the Sponsor. The dose formulations were prepared shortly before each dosing occasion using a magnetic stirrer and a spatula as homogenizers. The test item was weighed into a tared glass beaker on a suitable precision balance and the vehicle was added (weight:volume). Homogeneity of the test item in the vehicle was maintained during administration using a magnetic stirrer.

TEST ITEM ADMINISTRATION:
Dosing started in three female animals at a dosage level of 2000 mg/kg. Since no mortality occurred, a confirming dose group consisting of three male animals was administered at the same dose level. The animals received a single dose of the test item by oral gavage administration at 2000 mg/kg
body weight after being fasted for approximately 18 to 19 hours (access to water was permitted). Food was provided again approximately 3 hours after dosing. The dosing volume was 10 mL/kg body weight. Rationale: Oral administration was considered to be an appropriate application method as it is a possible route of human exposure during manufacture, handling and use of the test item.

Doses:

2000 mg/kg body weight

No. of animals per sex per dose:

3 females
3 males

Control animals:

no

Details on study design:

PURPOSE:
The purpose of this study was to assess the acute toxicity of Sa 57 when administered by single oral gavage to rats, followed by an observation period of 14 days. This study provides information for both hazard assessment and hazard classification purposes.

OBSERVATIONS:
Viability / Mortality: Daily during acclimatization. Once before treatment and within the first 30 minutes and at approximately 1, 2, 3 and 5 hours after treatment on test day 1 (in common with the clinical signs). Twice daily during days 2 – 15.
Clinical Signs: Daily during acclimatization and treatment. Additionally, within the first 30 minutes and at approximately 1, 2, 3 and 5 hours after
administration on test day 1.
Body Weights: On test days 1 (prior to administration), 8 and 15.

PATHOLOGY:
Necropsy: All animals were killed at the end of the observation period by carbon dioxide asphyxiation and discarded after macroscopic examinations were performed. An external examination and opening of the abdominal and thoracic cavities for examinations of major organs was performed. The
appearance of any macroscopic abnormalities was recorded. No organs or tissues were retained.

DATA COMPILATION:
Viability/mortality was recorded on data sheets. Body weights were recorded on-line with the ToxControl Computer System. Clinical signs, mortality data and macroscopic findings were compiled into the ToxControl Computer System during recording. The ToxControl Computer System has been licensed for Harlan Laboratories Ltd. and validated with respect to data collection, storage and retrievability.

Statistics:

No statistical analysis was performed.

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:

No intercurrent deaths occurred during the course of the study.

Clinical signs:

other: No clinical signs were recorded throughout the entire observation period.

Gross pathology:

No macroscopic findings were recorded at necropsy.

Any other information on results incl. tables

Due to the nature of the data all tables have been attached:

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 Sa 57 after single oral administration to rats of both sexes, observed over a period of 14 days, is:
LD50 (rat): greater than 2000 mg/kg body weight

Executive summary:

Two groups, one consisting of three female and one consisting of three male RccHan:WIST (SPF) rats, were treated with Sa 57 by single oral gavage administration at a dosage of 2000 mg/kg body weight. The test item was formulated in PEG 300 at a concentration of 0.2 g/mL and administered at a dosing volume of 10 mL/kg.

The animals were examined daily during the acclimatization period and mortality, viability and clinical signs were recorded. All animals were examined for clinical signs before treatment, within the first 30 minutes and approximately 1, 2, 3 and 5 hours after treatment on day 1 and once daily during test days 2-15. Mortality/viability was recorded before treatment, within the first 30 minutes and approximately 1, 2, 3 and 5 hours after administration on test day 1 (with the clinical signs) and twice daily during days 2-15. Body weights were recorded on day 1 (prior to administration) and on days 8 and 15. All animals were necropsied and examined macroscopically.

No intercurrent deaths occurred during the course of the study.

No clinical signs were recorded throughout the entire observation period.

The body weight of the animals was within the range commonly recorded for this strain and age.

No macroscopic findings were recorded at necropsy.

The median lethal dose of Sa 57 after single oral administration to rats of both sexes, observed over a period of 14 days, is: LD50 (rat): greater than 2000 mg/kg body weight

Based upon the referred classification criteria (Regulation (EC) No 1272/2008), Sa 57 is not classified with respect to acute oral toxicity.