Reaction Mass of 1,4-dimethyl-7-(prop-1-en-2-yl)-1,2,3,4,5,6,7,8-octahydroazulene and 3,8-dimethyl-5-(prop-1-en-2-yl)-1,2,3,3a,4,5,6,7-octahydroazulene and 4,8a,9,9-tetramethyldecahydro-1,6-methanonaphthalen-1-ol

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Study period:

1988-05-9 to 1988-05-17

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Meets generally accepted scientific standards with acceptable restrictions

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1988

Report date:

1988

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method B.4 (Acute Toxicity: Dermal Irritation / Corrosion)

Deviations:

yes

Remarks:

3 animals (the minimum permitted) were treated

GLP compliance:

not specified

Test material

Test material information

Constituent 1

Reference substance name:

Reaction Mass of 1,4-dimethyl-7-(prop-1-en-2-yl)-1,2,3,4,5,6,7,8-octahydroazulene and 3,8-dimethyl-5-(prop-1-en-2-yl)-1,2,3,3a,4,5,6,7-octahydroazulene and 4,8a,9,9-tetramethyldecahydro-1,6-methanonaphthalen-1-ol

EC Number:

939-227-3

Cas Number:

84238-39-1

Molecular formula:

Not applicable (a generic Molecular formula cannot be provided for this substance)

IUPAC Name:

Reaction Mass of 1,4-dimethyl-7-(prop-1-en-2-yl)-1,2,3,4,5,6,7,8-octahydroazulene and 3,8-dimethyl-5-(prop-1-en-2-yl)-1,2,3,3a,4,5,6,7-octahydroazulene and 4,8a,9,9-tetramethyldecahydro-1,6-methanonaphthalen-1-ol

Test animals

Species:

rabbit

Strain:

New Zealand White

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Commerical supplier
- Weight at study initiation: Animal 1: 2.14 kg; Animal 2: 2.37 kg; Animal 3: 2.27 kg
- Housing: Individually caged throughout testing
- Diet: Free access to pelleted food
- Water: Free access

ENVIRONMENTAL CONDITIONS
- After patch application, each animal was immobilised in canvas body sleeve and placed in a quiet place for the 4 hour contact period.

Test system

Type of coverage:

semiocclusive

Preparation of test site:

other: clipping

Vehicle:

unchanged (no vehicle)

Controls:

no

Amount / concentration applied:

0.5 mL

Duration of treatment / exposure:

4 hours

Observation period:

Observations were made at 30-60 minutes, and then at 24, 48 and 72 hours after patch removal.

Number of animals:

Three

Details on study design:

DESIGN

- No standard substance was applied for corroborative purposes
- The untreated skin of each animal served as its own control
- The degree of irritation was recorded in accordance with criteria given in Table 1 (below)

ANIMALS
- Testing was conducted when the hair was in the telogen (non-growth) phase of the hair cycle.
- Three to four days prior to testing, the dorsal area of the trunk of healthy adult animals was clipped to identify those which were in telogen and which had no skin blemishes.

PATCHES
- Each patch consisted of a 25 mm x 25 mm gauze pad, backed by a 20 mm x 30 mm strip of thin polythene film stuck to a 25 mm x 75 mm strip of zinc oxide sticking plaster.
- Animals were removed from the canvas body sleeves after 4 hours and the corners of each treatment site were marked.
- Patches were then removed and excess substance wiped from the skin with a damp tissue.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

erythema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1.67

Reversibility:

not fully reversible within: 72 hours

Results 2

Irritation parameter:

erythema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

2

Reversibility:

not fully reversible within: 72 hours

Results 3

Irritation parameter:

erythema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

2.33

Reversibility:

not fully reversible within: 72 hours

Results 4

Irritation parameter:

edema score

Basis:

animal #1

Time point:

24/48/72 h

Score:

1

Reversibility:

not fully reversible within: 72 hours

Results 5

Irritation parameter:

edema score

Basis:

animal #2

Time point:

24/48/72 h

Score:

1.67

Reversibility:

not fully reversible within: 72 hours

Results 6

Irritation parameter:

edema score

Basis:

animal #3

Time point:

24/48/72 h

Score:

2

Reversibility:

not fully reversible within: 72 hours

Irritant / corrosive response data:

One hour after patch removal, two animals showed slight erythema and one showed distinct erythema. Two also showed slight oedema. These effects intensified to show marked erythema, together with slight or marked oedema, in all three animals at 24 to 72 hours after patch removal.

The individual scores are given in Table 2.

Other effects:

No data

Any other information on results incl. tables

Table 2: Results data

Animal number	Erythema					Oedema
	1 h	24 h	48 h	72 h	Mean*	1 h	24 h	48 h	72 h	Mean*
1	1	2	2	1	1.67	1	1	1	1	1
2	1	2	2	2	2	0	1	2	2	1.67
3	2	2	2	3	2.33	1	2	2	2	2

* Mean of 24 h, 48 h and 72 h scores

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The test material was not irritating to rabbit skin.