Hexanoic acid, 3,5,5-trimethyl-, 1,1'-[2-ethyl-2-[[(3,5,5-trimethyl-1-oxohexyl)oxy]methyl]-1,3-propanediyl] ester

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013-06-06 to 2013-06-27

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP in accordance with recognised guidelines

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 420 (Acute Oral Toxicity - Fixed Dose Method)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.1 bis (Acute Oral Toxicity - Fixed Dose Procedure)

Deviations:

no

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

2-ethyl-2-(((3,5,5-trimethylhexanoyl)oxy)methyl)propane-1,3-diyl bis(3,5,5-trimethylhexanoate)

EC Number:

613-848-7

Cas Number:

65870-94-2

Molecular formula:

C33H62O6

IUPAC Name:

2-ethyl-2-(((3,5,5-trimethylhexanoyl)oxy)methyl)propane-1,3-diyl bis(3,5,5-trimethylhexanoate)

Details on test material:

- Expiration date of the lot/batch: 2013-05-02
- Storage condition of test material: Room temperature in the dark

Test animals

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Age at study initiation: 8-12 weeks
- Weight at study initiation: 152-163 g
- Fasting period during the study: Animals were fasted for overnight period before test item administration and for approximately 3-4 h after dosing.
- Housing: Animals were housed in groups of up to four in suspended solid-floor polypropylene cages furnished with woodflakes
- Diet: Food (2014C Teklad Global Rodent diet supplied by Harlan Laboratories UK Ltd., Oxon, UK), ad libitum
- Water: Mains drinking water, ad libitum
- Acclimation period: 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 19-25 °C
- Humidity: 30-70 %
- Air changes: 15 air changes/hour
- Photoperiod: 12 h dark / 12 h light

IN-LIFE DATES: From: 2013-06-06 To: 2013-06-27

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

unchanged (no vehicle)

Details on oral exposure:

SPECIFIC GRAVITY OF TEST ITEM: 0.932

MAXIMUM DOSE VOLUME APPLIED: 2.15 mL/kg bw

Doses:

- Sighting test: 2000 mg/kg bw
- Main test: 2000 mg/kg bw

No. of animals per sex per dose:

- Sighting test: 1 female/dose
- Main test: 4 females/dose

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations: Clinical observations were made 0.5, 1, 2, and 4 h after dosing and then daily for fourteen days. Morbidity and mortality checks were made twice daily.
- Frequency of weighing: Individual body weights were recorded on Day 0 (the day of dosing) and on Days 7 and 14.
- Necropsy of survivors performed: Yes; at the end of the observation period the animals were killed by cervical dislocation and were subjected to a macroscopic examination.

Statistics:

Using the mortality data obtained, an estimate of the acute oral median lethal dose (LD50) of the test item was made.

Results and discussion

Preliminary study:

- No mortality or signs of systemic toxicity were noted during the observation period.

Effect levels

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: No mortality was observed.

Mortality:

No mortality was observed.

Clinical signs:

other: No signs of systemic toxicity were noted during the observation period.

Gross pathology:

No abnormalities were observed at necropsy.

Other findings:

None

Any other information on results incl. tables

Individual body weights and body weight changes:

Dose level mg/kg	Animal number and sex	Body weight (g) at Day			Body weight gain (g) during week
		0	7	14	1	2
2000	1-0	156	168	187	12	19
	2-1	152	166	182	14	16
	2-2	163	171	208	8	37
	2-3	158	168	190	10	22
	2-4	153	166	183	13	17

Applicant's summary and conclusion

Interpretation of results:

not classified

Conclusions:

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

Executive summary:

Test Guidance

OECD Guideline 420 and EC Method B.1 bis (Acute Oral Toxicity - Fixed Dose Procedure)

 

Method and materials

Groups (4 females/dose) of Wistar rats (RccHan™:WIST) were given a single oral (gavage) dose of the test material 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. A sighting test was conducted with one female at the dose level of 2000 mg/kg bw to determine the dose for main study.

 

Results

No mortality was observed. No signs of systemic toxicity were noted during the observation period. All animals showed expected gains in body weight over the observation period. No abnormalities were observed at necropsy. In this study, the oral LD50 of the test item was considered to be higher than 2000 mg/kg bw in female rats.

 

Conclusion

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