2H-Pyran, tetrahydro-3-(phenylmethyl)-

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

7 to 29 December 2004

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP study conducted in compliance with OECD Guideline No. 423 with minor deviations: age at study initiation, housing and feeding conditions, details of fasting not reported. These deviations do not affect the quality of the study and are not considered to be relevant.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2005

Report date:

2005

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:

17 December 2001.

Deviations:

yes

Remarks:

age at study initiation, housing and feeding conditions, details of fasting not reported

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Directive n° 2004/73/EC.

Deviations:

yes

Remarks:

age at study initiation, housing and feeding conditions, details of fasting not reported

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

Inspected 2004-07-01 / Signed 2004-09-13

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

(3R)-3-benzyloxane

Molecular formula:

C12 H16 O

IUPAC Name:

(3R)-3-benzyloxane

Constituent 2

Reference substance name:

(3S)-3-benzyloxane

Molecular formula:

C12 H16 O

IUPAC Name:

(3S)-3-benzyloxane

Test material form:

liquid

Remarks:

clear

Details on test material:

- Physical state: Colourless translucent liquid, characteristic odour
- Storage conditions : room temperature

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Elevage JANVIER (53940 Le Genest St Isle, France).
- Weight at study initiation: 195-199 g
- Fasting period before study: No data
- Housing: No data
- Diet: Rat and Mouse maintenance Diets.
- Water: No data
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 21-22 °C
- Humidity: 25-48 %

IN-LIFE DATES: 7 to 29 December 2004

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Remarks:

distilled water

Details on oral exposure:

ADMINISTRATION: Animals received an effective dose of 2000 mg/kg bw of the test item, administered by force-feeding under a volume of 2.0 mL/kg bw using a suitable syringe graduated fitted with an oesophageal metal canula.

MAXIMUM DOSE VOLUME APPLIED: 2.0 mL/kg bw

CLASS METHOD
- Rationale for the selection of the starting dose: Not reported but maximum regulatory concentration

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6 females/dose

Control animals:

yes

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations: Clinical observations were performed 30 minutes, 1, 3 and 4 h after test substance administration, and once daily thereafter for 14 days.
- Frequency of weighing: Body weights were observed on Days 0, 2, 7 and 14.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight,organ weights, macroscopical examinations

Statistics:

None

Results and discussion

Preliminary study:

Not applicable

Effect levels

Key result

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: no mortality occurred during the study.

Mortality:

No mortality occurred during the study.

Clinical signs:

other: No clinical signs related to the administration of the test item were recorded.

Gross pathology:

The macroscopical examination of the animals at the end of the study did not reveal treatment-related changes.

Other findings:

None

Any other information on results incl. tables

None

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

Under the test conditions, the oral LD50 for test substance is higher than 2000 mg/kg bw in female rats therefore it is not classified according to the criteria of the Regulation EC No. 1272/2008 (CLP) and to the GHS.

Executive summary:

In an acute oral toxicity study (limit test) performed according to OECD Guideline 423 and in compliance with GLP, 6 female Sprague Dawley rats were given a single oral (gavage) dose of test substance at 2000 mg/kg bw administered by gavage under a volume of 2.0 mL/kg bw. Animals were then observed for mortality, clinical signs and bodyweights for 14 days and were all sacrificed for macroscopic examination.

No mortality occurred during the study. No clinical signs related to the administration of the test substance were observed. The body weight evolution of the animals remained normal throughout the study, similar between treated and control animals. The macroscopic examination of the animals at the end of the study did not reveal treatment related changes. In this study, the oral LD50 of test substance was considered to be higher than 2000 mg/kg bw in female rats.

 

Under the test conditions, the test substance is not classified for acute oral toxicity according to the criteria of the Regulation EC No. 1272/2008 (CLP) and to the GHS.

This study is considered as acceptable and satisfies the requirement for acute oral toxicity endpoint.