2-(3,3-dimethylcyclohex-1-enyl)-2,5,5-trimethyl-1,3-dioxane

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 22 July to 6 August, 2015.

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 deviation: a relative humidity higher than 70% was registered only in one day. This deviation does not affect the quality of the study.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

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:

a relative humidity higher than 70% was registered only in one day. The maximum value measured was 71%. This deviation do not affect the quality of the study and are not considered to be relevant.

Test guideline 2

Qualifier:

according to guideline

Guideline:

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

Deviations:

yes

Remarks:

a relative humidity higher than 70% was registered only in one day. The maximum value measured was 71%. This deviation do not affect the quality of the study and are not considered to be relevant.

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

Inspected on 2013-06-3&4 / Signed on 2013-09-13

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

2-(3,3-dimethylcyclohex-1-en-1-yl)-2,5,5-trimethyl-1,3-dioxane

EC Number:

815-500-1

Cas Number:

1853175-99-1

Molecular formula:

C15 H26 O2

IUPAC Name:

2-(3,3-dimethylcyclohex-1-en-1-yl)-2,5,5-trimethyl-1,3-dioxane

Test material form:

liquid

Details on test material:

- Physical state: Liquid
- Storage condition of test material: room temperature, darkness.

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)
- Age at study initiation: 8 weeks
- Weight at study initiation: 174 - 204 g
- Housing: housed by group of three in solid-bottomed clear polycarbonate cages with a stainless steel mesh lid.
- Diet: foodstuff (A04, SAFE), ad libitum but food was removed at D-1 and then redistributed 4 hours after the test item administration.
- Water: tap water, ad libitum
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 19-25 °C
- Humidity: 30-70%
- Air changes: at least ten changes per hour.
- Photoperiod: 12 h light/12 h darkness.

IN-LIFE DATES: From 22 July to 06 August 2015.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

MAXIMUM DOSE VOLUME APPLIED: 2.11 mL/kg bw

ADMINISTRATION OF TEST ITEM:
Animals received an effective dose of 2000 mg/kg bw of the test item, administered by force-feeding under a volume of 2.11 mL/kg bw using a suitable syringe graduated fitted with an oesophageal metal canula.

Doses:

2000 mg/kg bw

No. of animals per sex per dose:

6 females

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: Animals were observed 30 min, 1, 3 and 4 hours after test item administration and thereafter once daily for 14 days. Animals were weighed pretest (Day 0) and on Day 2, 7 and 14.
- Necropsy of survivors performed: Yes; Animals were killed on Day 14 and subjected to macroscopic examination.

Statistics:

None

Results and discussion

Preliminary study:

Not applicable

Effect levels

Effect levels 1

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.

Effect levels 2

Key result

Sex:

female

Dose descriptor:

LD50 cut-off

Effect level:

> 5 000 mg/kg bw

Based on:

test mat.

Mortality:

No mortality occurred during the study.

Clinical signs:

other: No clinical signs related to the administration of the test item were observed during the study.

Gross pathology:

The macroscopic axamination 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 and the LD50 cut-off may be considered to be higher than 5000 mg/kg bw in female rats. Therefore, the substance is not classified according to the annex I 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 item at 2000 mg/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 item were observed during the study. The body weight evolution of the animals remained normal throughout the study, similar between treated and control animals. The macroscopical examination of the animals at the end of the study did not reveal treatment-related changes.

 

Under the test conditions, the oral LD50 for test substance is higher than 2000 mg/kg bw and the LD50 cut-off may be considered to be higher than 5000 mg/kg bw in female rats. Therefore, the substance is not classified according to the annex I 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.