reaction mass of 1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,4,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,5,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 March 1980 - 1 April 1980

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study performed similar to the OECD TG 402 "Acute Dermal Toxicity", 1987, but was not performed under GLP. Report is well documented, and the design is considered scientifically accepted.

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1980

Report date:

1980

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

yes

Remarks:

8 male and 8 female rat, one dose tested

GLP compliance:

no

Test type:

standard acute method

Limit test:

yes

Test material

Test material information

1

Reference substance name:

Reaction Mass of 1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,4,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,5,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

EC Number:

915-730-3

Molecular formula:

C16H26O

IUPAC Name:

Reaction Mass of 1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,4,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one and 1-(1,2,3,5,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

Constituent 1

Reference substance name:

1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

EC Number:

259-174-3

EC Name:

1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

Cas Number:

54464-57-2

Molecular formula:

C16H26O

IUPAC Name:

1-(2,3,8,8-tetramethyl-1,2,3,4,5,6,7,8-octahydronaphthalen-2-yl)ethanone

Constituent 2

Reference substance name:

1-(1,2,3,5,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

EC Number:

268-978-3

EC Name:

1-(1,2,3,5,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

Cas Number:

68155-66-8

Molecular formula:

C16H26O

IUPAC Name:

1-(2,3,8,8-tetramethyl-1,2,3,5,6,7,8,8a-octahydronaphthalen-2-yl)ethanone

Constituent 3

Reference substance name:

1-(1,2,3,4,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

EC Number:

268-979-9

EC Name:

1-(1,2,3,4,6,7,8,8a-octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one

Cas Number:

68155-67-9

Molecular formula:

C16H26O

IUPAC Name:

1-(2,3,8,8-tetramethyl-1,2,3,4,6,7,8,8a-octahydronaphthalen-2-yl)ethanone

Test material form:

liquid

Test animals

Species:

rat

Strain:

Sprague-Dawley

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Charles River Breeding Labs (Wilmington, Mass., USA)
- Age at study initiation: no data
- Weight at study initiation: 180 to 280 grams
- Housing: singly in wire cages under standard laboratory conditions meeting the standards described in the 'Guide for the Care and Use of Laboratory Animals' (DHEW Publication No. (NIH) 78-23 Revised 1978).
- Diet: Purina Rodent Laboratory Chow 5001 ad libitum
- Water: ad libitum
- Acclimation period: 7 days

ENVIRONMENTAL CONDITIONS: no data

IN-LIFE DATES: no data

Administration / exposure

Type of coverage:

open

Vehicle:

other: SDA39C (alcoholic solution)

Details on dermal exposure:

TEST SITE
- Area of exposure: area bounded by the nape of the neck, the mid dorsum between pectoral and pelvic girdles and the lateral aspects of the scapulae (the backs of the rats were clipped from the scapular region to the hips a day prior to treatment)
- % coverage: less than 30% of the body surface

REMOVAL OF TEST SUBSTANCE
- Washing (if done): wiping with a clean cloth
- Time after start of exposure: 24 hours

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 0.5 ml/100 g bw
- Concentration (if solution): 5000 mg/kg bw
- Constant volume or concentration used: yes, constant concentration

Duration of exposure:

24 hours

Doses:

5000 mg/kg bw

No. of animals per sex per dose:

8 males and 8 females

Control animals:

yes, concurrent vehicle

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: mortality and pharmacotoxic signs: at 1, 3, 5 and 24 hours following dosing and twice daily (once daily on weekends) for the remainder of the 14 day observation period. Weighing: Pre-dose and Day 14.
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, other: necropsy-tissues examined: lungs, heart, liver, spleen, kidney, adrenals, bladder, stomach, intestines. Other tissues examined grossly: the external carcass (fur, skin and orifices), peritoneal and pleural mucosa, internal mesentery.

Results and discussion

Preliminary study:

In a preliminary range finding assay in which two rats (one of each sex) were treated at 5000 mg/kg bw., there were no deaths during the 72 hour observation period.

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 5 000 mg/kg bw

Remarks on result:

other: No mortality noted at this dose level.

Mortality:

No mortality was seen in the 8 males and 8 females dosed with the test article.

Clinical signs:

other: There were no clinical signs of toxicity in any animal dosed at 5000 mg/kg bw. All the animals appeared normal in health and behavior throughout the 14 day observation period.

Gross pathology:

There were no signs indicative of toxicity in any of the rats necropsied at term. No visible lesions in the tissues examined.

Applicant's summary and conclusion

Interpretation of results:

other: criteria are not met

Remarks:

according to EU CLP (1272/2008 and its amendments)

Conclusions:

This study found no effects that related to acute dermal toxicity in rats after administrating a single dose of 5000 mg/kg bw. The LD50 was in excess of 5000 mg/kg.

Executive summary:

The dermal acute toxicity of the substance, a yellow liquid, was examined according to a similar to OECD TG 402, 1987, protocol. First a preliminary study was performed with x males and females. In the final study eight male and eight female albino rats (Sprague-Dawley CD strain) were used. The animals weighing between 180 and 280 grams, were clipped on the day prior to dosing and the test substance, prepared in the diluent supplied, was applied onto the skin at 5000 mg/kg bw. The volume of the solution administered was 0.5 ml/100 g bw.

In the preliminary study no mortality occurred in 72h. In the main study none of the test animals showed any clinical signs indicative of systemic toxicity. All of the animals remained healthy throughout the study and gained weight in a normal manner. At necropsy performed on the survivors at term, none of the animals had any signs indicative of systemic toxicity. The dermal LD50 was greater than 5000 mg/kg bw.