trans-5-butyl-2-(3',3'',4'',5''-tetrafluoro-1,1':4',1''-terphenyl-4-yl)-1,3-dioxane

Endpoint summary

Description of key information

The LD50 value of the test item was determined to be greater than 2000 mg/kg bw after oral administration.

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Apr 01 - 29, 2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

yes

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Wiga GmbH, Kißlegg
- Age at study initiation: 6 weeks (males) and 11 weeks (females)
- Weight at study initiation: 156 - 174 g
- Fasting period before study: 17 hours before until up to 4 hours after treatment
- Housing: separately in type III Makrolon cages
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22 to 25 °C
- Humidity (%): 49 to 66 %
- Photoperiod (hrs dark / hrs light): 12 hour light - 12 hour dark regime

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

Route of administration:

oral: gavage

Vehicle:

other: 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: excellent vehicle performance in long range historical data

MAXIMUM DOSE VOLUME APPLIED: 2000 mg/kg bw

Doses:

2000 mg/kg bw

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 and weighing: on days 2, 4, 6, 8, 11, 13, and 15 of the experimental part.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross pathology

Statistics:

Standard statistical methods have been applied for data processing.

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

All rats survived the observation period.

Clinical signs:

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

Body weight:

The body weight development of the rats was inconspicuous during the study.

Gross pathology:

The gross pathological examination revealed no organ alterations.

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:

The test material was tested for acute toxicity in rats after single oral administration of 2000 mg/kg body weight. The study was performed according to the OECD Guideline for Testing of Chemicals, No. 423. No signs of toxicity were seen in the rats (3 males, 3 females) after treatment with 2000 mg/kg bw of the test item. The body weight development of the rats was inconspicuous during the study. There were no deaths during the course of the study. The gross pathological examination revealed no organ alterations.

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 bw after single oral administration in rats.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

discriminating dose

Value:

2 000 mg/kg bw

Quality of whole database:

Guideline study under GLP conditions

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no study available

Additional information

The study was performed according to the OECD Guideline for Testing of Chemicals, No. 423. No signs of toxicity were seen in the rats (3 males, 3 females) after treatment with 2000 mg/kg bw of the test item. 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 bw after single oral administration in rats.

Justification for classification or non-classification

The data provided are reliable and suitable for classification and labelling. The test item is not classified for acute oral toxicity according to Regulation (EC) No 1272/2008.