1-Ethoxy-2,3-difluoro-4-[4-(trans-4-pentylcyclohexyl)-1-cyclohexene-1-yl]-benzene

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

August 24, 2007 - February 6, 2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

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 on December 17, 2001

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Official Journal of the European communities No. L 152, April 30, 2004

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:

1-Ethoxy-2,3-difluor-4-[4-(trans-4-propylcyclohexyl)-1-cyclohexen-1-yl]-benzene

EC Number:

603-006-7

Cas Number:

124728-62-7

Molecular formula:

C23H34F2O

IUPAC Name:

1-Ethoxy-2,3-difluor-4-[4-(trans-4-propylcyclohexyl)-1-cyclohexen-1-yl]-benzene

Test material form:

solid

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: F. Winkelmann, Borchen, Germany
- Females (if applicable) nulliparous and non-pregnant: yes
- Age at study initiation: 7 to 8 weeks
- Weight at study initiation: 161 - 171g
- Fasting period before study: 17 hours before until up to 4 hours after treatment
- Housing: separately in type III Makrolon cages
- Diet: ad libitum
- Water: ad libitum
- Acclimation period: at least 7 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 - 24°C
- Humidity (%): 44 - 70%
- Photoperiod (hrs dark / hrs light): 12 hour light - 12 hour dark regime

IN-LIFE DATES: From: day 1 To: day 15

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

methylcellulose

Remarks:

Methocel K4M Premium solution

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 200 g/L
- Amount of vehicle (if gavage): 10 ml/kg
- Justification for choice of vehicle: well tolerated and established standard vehicle

Doses:

2000 mg/kg

No. of animals per sex per dose:

3 (m) / 3 (f)

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations: daily
- Frequency of weighing: day 1, 2, 4, 6, 8, 11, 13 and 15
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross pathology

Statistics:

Standard statistical methods have been applied for data processing.

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

not determinable due to absence of adverse toxic effects

Mortality:

All rats survived the observation period.

Clinical signs:

other: No signs of toxicity were seen in the 3 male and 3 female rats after treatment with 2000 mg/kg.

Gross pathology:

The gross pathological examination revealed no organ alterations.

Any other information on results incl. tables

Study design

The test material was tested for acute toxicity in rats after single oral administration of 2000 mg/kg body weight. The test material was suspended with aqueous Methocel^®K4M Premium solution as vehicle.This study was performed according to the “Acute toxic class method“ (ATC) as described in OECD Guideline 423.

Results

No signs of toxicity were seen in the rats (3 males and 3 females) after treatment with 2000 mg/kg. There were no deaths during the course of the study.The gross pathological examination revealed no organ alterations.

Conclusion

Based on the result of this study, it is concluded that the test material has no acute toxic potential and that the LD₅₀value is higher than 2000 mg/kg after single oral treatment in rats.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Based on the result of this study, it is concluded that the test material has no acute toxic potential and that the LD50 value is higher than 2000 mg/kg after single oral administration in rats.

Executive summary:

This study was performed according to GLP and is fully compliant OECD TG 423. Based on the result of this study, it is concluded that the test material has no acute toxic potential and that the LD₅₀value is higher than 2000 mg/kg after single oral administration in rats.