9-Decenoic acid, methyl ester

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 January 2012 to 01 February 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2012

Report date:

2012

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.3 (Acute Toxicity (Dermal))

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Date of inspection 2011-07-19 to 2011-07-21; Date of signature 2011-08-31

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

methyl dec-9-enoate

EC Number:

662-772-0

Cas Number:

25601-41-6

Molecular formula:

C11H20O2

IUPAC Name:

methyl dec-9-enoate

Details on test material:

- Name of test material (as cited in study report): 9-decenoic acid, methyl ester (9DAME)
- Physical state: Clear colourless liquid
- Purity: 99%
- Lot/batch No.: 184-109
- Date received: 2011-04-01
- Storage conditions: room temperature in the dark under nitrogen

Test animals

Species:

rat

Strain:

Wistar

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan Laboratories UK Ltd., Oxon, UK
- Age at study initiation: 8-12 weeks
- Weight at study initiation: at least 200 g
- Fasting period before study: No data
- Housing: Animals were housed in suspended solid-floor polypropylene cages furnished with woodflakes. The animals were housed individually during the 24 hour exposure period and in groups of 5, by sex, for the remainder of the study.
- Diet: available ad libitum
- Water: mains drinking water available ad libitum
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 19-25 °C
- Humidity: 30-70%
- Air changes: at least 15 changes per hour
- Photoperiod: 12 hours light (06:00 to 18:00) and 12 hours darkness

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Details on dermal exposure:

TEST SITE
- Area of exposure: On the day before treatment the back and flanks of each animal were clipped free of hair.
- % coverage: approximately 10% of the total body surface area
- Type of wrap if used: A piece of surgical gauze was placed over the treatment area and semi-occluded with a piece of self-adhesive bandage.

REMOVAL OF TEST SUBSTANCE
- Washing (if done): The treated skin and the surrounding hair was wiped with cotton wool moistened with arachis oil BP to remove any residual test item.
- Time after start of exposure: 24 hours

TEST MATERIAL
- Amount applied: 2.26 mL/kg
- The test material was used as supplied.

Duration of exposure:

24 hours

Doses:

2000 mg/kg

No. of animals per sex per dose:

5 animals/sex

Control animals:

no

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: 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 14 days.
- Necropsy of survivors performed: All animals were subjected to gross necropsy. The appearance of any macroscopic abnormalities were recorded. No tissues were retained.
- Other examinations performed: clinical signs, body weight: Individual bodyweights were recorded prior to application of the test item on Day 0 and on Days 7 and 14.

Results and discussion

Effect levels

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

There were no deaths during the study.

Clinical signs:

other: There were no signs of systemic toxicity.

Gross pathology:

No abnormalities were noted at necropsy.

Other findings:

Very slight erythema was noted at the test sites of all males and one female. Small superficial scattered scabs were also noted at the test site of one male. There were no signs of dermal irritation noted in four females.

Any other information on results incl. tables

Individual dermal reactions- male

Dose Level mg/kg	Animal Number and Sex	Observation	Effects Noted After Initiation of Exposure (Days)
			1	2	3	4	5	6	7	8	9	10	11	12	13	14
2000	1-0 Male	Erythema	0	1	1	1	1	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-1 Male	Erythema	0	0	1	1	1	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-2 Male	Erythema	0	1	1	1	1	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-3 Male	Erythema	0	0	1	1	1	1	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	1-4 Male	Erythema	0	0	1	1	1	1	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	Ss	Ss	Ss	0	0	0	0	0	0	0	0	0

0= no reactions

Ss= small superficial scattered scabs

Individual dermal reactions- female

Dose Level mg/kg	Animal Number and Sex	Observation	Effects Noted After Initiation of Exposure (Days)
			1	2	3	4	5	6	7	8	9	10	11	12	13	14
2000	2-0 female	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-1 female	Erythema	0	1	1	1	1	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-2 female	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-3 female	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0
	2-4 female	Erythema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Oedema	0	0	0	0	0	0	0	0	0	0	0	0	0	0
		Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0

0= no reactions

 

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Remarks:

(EU CLP)

Conclusions:

The acute dermal LD50 of 9-decenoic acid, methyl ester (9DAME) in the Wistar strain rat was found to be >2000 mg/kg bw.