Trans-2-[4'-[Difluor(3,4,5-trifluorphenoxy)methyl]-3',5'-difluor[1,1'-biphenyl]-4-yl]-5-propyl-tetrahydro-2H-pyran

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

December 22, 2005 - March 31, 2006

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2006

Report date:

2006

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

96/54/EC

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

2001-12-17

Deviations:

no

GLP compliance:

yes

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Reference substance 001

EC Number:

616-651-4

Cas Number:

787582-75-6

Molecular formula:

C26H2 lF702

Constituent 2

Reference substance name:

APUQU-2-F

IUPAC Name:

APUQU-2-F

Details on test material:

Batch: E06000594
Purity: (HPLC): 99.7 % (a/a)

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

Test system
Species: Rat, Wistar HsdCpb: WU, males (m) and females (f)
Breeder: F. Winkelmann, 33178 Borchen
Age: approx. 6 to 8 weeks

I- dentification and adaptation
Healthy young animals were allocated to the study group at least 7 days before dosing to allow for acclimatization.
The rats were identified by an ear tattoo.

- Housing and diet
The rats were housed in an air-conditioned room of about 25 m^2 in the Institute of Toxicology. Lighting was controlled by a timer to provide a 12 hour light - 12 hour dark regime.

The rats were kept separately in type III Makrolon cages with a shelter, placed on mobile racks. Conventional softwood granulate was used
as the bedding. One day before treatment, and up to 24 hours after dosing, metal grids were placed above the softwood granulate.
The cages and the metal grids had been machine-cleaned before the start of the experimental part. The bedding was changed two times per
week.

Temperature and humidity were measured using a thermohygrograph. The room temperature during the experimental period was 20 to 22 °C
and the relative atmospheric humidity 51 to 80 %.

Diet was withheld from 17 hours before until up to 4 hours after treatment. At all other times food and tap water from Makrolon drinking
bottles were available to the rats ad libitum.

According to the specifications given by the manufacturer, the diet, Provimi Kliba 3433.0, had been checked by independent laboratories.
Analysis included qualitative and quantitative evaluation for heavy metals, aflatoxins, pesticides, and antibiotics.
The drinking water was periodically analyzed according to the German regulations for human drinking water.

The softwood granulate was analytically checked by independent laboratories.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

other: Aqueous Methocel® K4M Premium solution (2.5 g/L)

Details on oral exposure:

NA

Doses:

2000 mg/kg bw (limit test)

No. of animals per sex per dose:

3

Control animals:

no

Details on study design:

NA

Statistics:

NA

Results and discussion

Preliminary study:

NA

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Mortality:

No mortality observed. All rats survived the observation period.

Clinical signs:

No signs of toxicity were detected in the 3 male and 3 female rats after treatment with 2000 mg/kg of the test item.

Body weight:

Body weight development of the treated rats was inconspicuous.

Gross pathology:

At necropsy no organ alterations were seen.

Other findings:

None.

Any other information on results incl. tables

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

All rats survived the observation period. Body weight development of the treated rats was inconspicuous. At necropsy no organ alterations were seen.

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 item has no acute toxic potential and that the LD50 value is higher than 2000 mg/kg bw following oral treatment in rats.

Executive summary:

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

All rats survived the observation period. Body weight development of the treated rats was inconspicuous. At necropsy no organ alterations were seen.