Cyclohexanepropanal, 4-(2-methylpropyl)-

Acute Toxicity: oral

Administrative data

Endpoint:

acute toxicity: oral

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Testing was conducted between 03 September 2013 and 01 October 2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: The study is considered to be a reliability 1 as it has been conducted according to OECD Test Guideline 423 using the Acute Oral Toxicity-Acute Toxic Class Method in compliance with GLP.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2013

Report date:

2013

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

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

Deviations:

yes

Remarks:

On occasions the relative humidity was outside the target range of 30 to 70 %. This was considered not to have affected the purpose or integrity of the study.

GLP compliance:

yes (incl. QA statement)

Test type:

acute toxic class method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

3-[4-(2-methylpropyl)cyclohexyl]propanal

EC Number:

940-042-5

Cas Number:

1254940-85-6

Molecular formula:

C13H24O

IUPAC Name:

3-[4-(2-methylpropyl)cyclohexyl]propanal

Details on test material:

Identification: IFF TM 10-202
Storage Conditions: room temperature in the dark

Test animals

Species:

rat

Strain:

Wistar

Sex:

female

Details on test animals or test system and environmental conditions:

Animals and Animal Husbandry

Female Wistar (RccHan™:WIST) strain rats were supplied by Harlan Laboratories UK Ltd., Oxon, UK. On receipt the animals were randomly allocated to cages. The females were nulliparous and non pregnant. After an acclimatization period of at least five days the animals were selected at random and given a number unique within the study by indelible ink marking on the tail and a number written on a cage card. At the start of the study the animals were eight to twelve weeks of age. The body weight variation did not exceed ± 20 % of the body weight of the initially dosed animal.

The animals were housed in groups of up to three in suspended solid floor polypropylene cages furnished with woodflakes. With the exception of an overnight fast immediately before dosing and for approximately three to four hours after dosing, free access to mains drinking water and food (2014C Teklad Global Rodent diet supplied by Harlan Laboratories UK Ltd., Oxon, UK) was allowed throughout the study. The diet, drinking water and bedding were routinely analyzed and were considered not to contain any contaminants that would reasonably be expected to affect the purpose or integrity of the study.

The temperature and relative humidity were set to achieve limits of 19 to 25 °C and 30 to 70 % respectively. Any occasional deviations from these targets were considered not to have affected the purpose or integrity of the study. The rate of air exchange was at least fifteen changes per hour and the lighting was controlled by a time switch to give twelve hours continuous light (06:00 to 18:00) and twelve hours darkness.

The animals were provided with environmental enrichment items which were considered not to contain any contaminant of a level that might have affected the purpose or integrity of the study.

Justification
Rats are the preferred species of choice as historically used for safety evaluation studies and are specified in the appropriate test guidelines.

Administration / exposure

Route of administration:

oral: gavage

Vehicle:

arachis oil

Details on oral exposure:

Test Item Formulation and Experimental Preparation

For the purpose of the 2000 mg/kg dose level, the test item was used as supplied. The specific gravity was determined and used to calculate the appropriate dose volume for the required dose level. For the purpose of the 300 mg/kg dose level, the test item was freshly prepared, as required, as a solution in arachis oil BP. Arachis oil BP was used because the test item did not dissolve/suspend in distilled water.

The test item was formulated within two hours of being applied to the test system. It is assumed that the formulation was stable for this duration.

No analysis was conducted to determine the homogeneity, concentration or stability of the test item formulation. This is an exception with regard to GLP and has been reflected in the GLP compliance statement.

In the absence of data regarding the toxicity of the test item, 2000 mg/kg was chosen as the starting dose.

Doses:

Groups of fasted animals were dosed 300 mg/kg with a dose volume of 10 mL/kg. A second dose level of 2000 mg/kg was administered with a dose volume of 2.27 mL/kg and was tested twice.

All animals were dosed once only by gavage, using a metal cannula attached to a graduated syringe. The volume administered to each animal was calculated according to the fasted body weight at the time of dosing. Treatment of animals was sequential. Sufficient time was allowed between each group to confirm the survival of the previously dosed animals.

No. of animals per sex per dose:

3 females rats per dose level

Control animals:

no

Details on study design:

The animals were observed for deaths or overt signs of toxicity 0.5, 1, 2 and 4 hours after dosing and subsequently once daily for fourteen days.

Individual body weights were recorded prior to dosing and seven and fourteen days after treatment.

At the end of the observation period the animals were killed by cervical dislocation. All animals were subjected to gross pathological examination. This consisted of an external examination and opening of the abdominal and thoracic cavities for examination of major organs. The appearance of any macroscopic abnormalities was recorded. No tissues were retained

Statistics:

Data evaluations included the relationship, if any, between the exposure of the animal to the test item and the incidence and severity of all abnormalities including behavioral and clinical observations, gross lesions, body weight changes, mortality and any other toxicological effects.

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

The results were also evaluated according to Regulation (EC) No 1272/2008, relating to the Classification, Labelling and Packaging of Substances and Mixtures.

Results and discussion

Effect levels

Sex:

female

Dose descriptor:

LD50

Effect level:

2 000 mg/kg bw

Based on:

test mat.

Mortality:

There were no deaths.

Clinical signs:

other: Pilo-erection and/or hunched posture were noted in animals treated at a dose level of 2000 mg/kg. Additional signs of systemic toxicity noted in one animal treated at a dose level of 2000 mg/kg were ptosis, ataxia, lethargy and labored, noisy and gasping

Gross pathology:

No abnormalities were noted at necropsy.

Any other information on results incl. tables

Mortality Data

Dose Level mg/kg	Sex	Number of Animals Treated	Deaths During Day of Dosing (Hours)				Deaths During Period After Dosing (Days)								Deaths
			½	1	2	4	1	2	3	4	5	6	7	8-14
300	Female	3	0	0	0	0	0	0	0	0	0	0	0	0	0/3
2000	Female	3	0	0	0	0	0	0	0	0	0	0	0	0	0/3
	Female	3	0	0	0	0	0	0	0	0	0	0	0	0	0/3

Individual Clinical Observations - 300 mg/kg

Dose Level mg/kg	Animal Number and Sex	Effects Noted After Dosing (Hours)				Effects Noted During Period After Dosing (Days)
		½	1	2	4	1	2	3	4	5	6	7	8	9	10	11	12	13	14
300	1-0 Female	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-1 Female	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-2 Female	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

0=   No signs of systemic toxicity

Individual Clinical Observations - 2000 mg/kg

Dose Level mg/kg	Animal Number and Sex	Effects Noted After Dosing (Hours)				Effects Noted During Period After Dosing (Days)
		½	1	2	4	1	2	3	4	5	6	7	8	9	10	11	12	13	14
2000	2-0 Female	0	0	H	HP	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-1 Female	0	0	H	H	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-2 Female	0	0	H	HP	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	3-0 Female	0	H	H	H	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	3-1 Female	H	H	H	H	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	3-2 Female	HRlPt	H	HA	HALRnPt	0	0	0	0	0	0	HP	HP	HPRl	H	HRlRg	HRlRg	HP RlRg	HP RlRg

0=   No signs of systemic toxicity

P =   Pilo-erection

H =  Hunched posture

Pt = Ptosis

Rl = Labored

Rn = Noisy respiration

Rg =Gasping respiration

A =  Ataxia

L =  Lethargy

Individual Body Weights and Body Weight Changes - 300 mg/kg

Dose Level mg/kg	Animal Number and Sex	Body Weight (g) at Day			Body Weight Gain (g) During Week
		0	7	14	1	2
300	1-0 Female	164	174	223	10	49
	1-1 Female	154	166	192	12	26
	1-2 Female	158	162	194	4	32

Individual Body Weights and Body Weight Changes - 2000 mg/kg

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	2-0 Female	172	184	199	12	15
	2-1 Female	173	183	197	10	14
	2-2 Female	164	179	199	15	20
	3-0 Female	163	181	187	18	6
	3-1 Female	162	187	191	25	4
	3-2 Female	166	140	143	-26	3

 

Individual Necropsy Findings - 300 mg/kg

Dose Level mg/kg	Animal Number and Sex	Time of Death	Macroscopic Observations
300	1-0 Female	Killed Day 14	No abnormalities detected
	1-1 Female	Killed Day 14	No abnormalities detected
	1-2 Female	Killed Day 14	No abnormalities detected

Individual Necropsy Findings - 2000 mg/kg

Dose Level mg/kg	Animal Number and Sex	Time of Death	Macroscopic Observations
2000	2-0 Female	Killed Day 14	No abnormalities detected
	2-1 Female	Killed Day 14	No abnormalities detected
	2-2 Female	Killed Day 14	No abnormalities detected
	3-0 Female	Killed Day 14	No abnormalities detected
	3-1 Female	Killed Day 14	No abnormalities detected
	3-2 Female	Killed Day 14	No abnormalities detected

Applicant's summary and conclusion

Interpretation of results:

study cannot be used for classification

Remarks:

Migrated information

Conclusions:

The acute oral median lethal dose (LD50) of the test item in the female Wistar strain rat was found to be greater than 2000 mg/kg body weight (Globally Harmonized Classification System - Category 5, >2000 - 5000 mg/kg body weight).

The test item does not meet the criteria for classification according to Regulation (EC) No 1272/2008, relating to the Classification, Labelling and Packaging of Substances and Mixtures.

Executive summary:

The acute oral toxicity of substance IFF TM 10-202 is greater than 2000 mg/kg bodyweight according to OECD Test Guideline 423 using the Acute Toxic Class Method.