Reaction mass of 2-isopropenyl-5-methylhex-4-en-1-ol and 2-isopropenyl-5-methylhex-4-enyl acetate and DL-borneol and caryophyllene and linalool and linalyl acetate and p-menth-1-en-4-ol

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation / corrosion, other

Remarks:

Classification based on calculation rules for mixtures of the CLP Regulation

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

accepted calculation method

Justification for type of information:

Classification based on calculation rules for mixtures of the CLP Regulation
Constituants data come from an online compilation using secondary data sources. There is no experimental study reference, however data is cited in the database as peer reviewed.

Data source

Reference

Reference Type:

publication

Title:

Unnamed

Year:

2002

Report date:

2002

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

Comparative studies on the irritancy of oils and synthetic perfumes to the skin of rabbit, guinea pig, rat, miniature swine and man (6 Angora rabbits, 6 guinea pigs and rats, 6 Miniature swines and 50 Humans, male volunteers without known allergies).

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Linalyl acetate

EC Number:

204-116-4

EC Name:

Linalyl acetate

Cas Number:

115-95-7

Molecular formula:

C12H20O2

IUPAC Name:

(1)-1,5-Dimethyl-1-vinylhex-4-enyl acetate

Specific details on test material used for the study:

Linalyl acetate, purity >95%

Test animals

Species:

other: raabits, rats, guinea pigs, Miniature swine and human

Strain:

Angora

Test system

Type of coverage:

open

Preparation of test site:

clipped

Remarks:

clipped dorsal skin (3 x 3 cm)

Vehicle:

not specified

Amount / concentration applied:

0.1 g

Duration of treatment / exposure:

at 0, 24 and 72 h; after 72 h Evans blue was injected i.v., animals were killed after 1 h and dorsal skin was removed.

Observation period:

Skin reaction on living skin at 24 and 72 h; on removed skin dilation rate, oedema, capillary permeability and bleeding rate; skin histopathology.

Number of animals:

18

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

overall irritation score

Basis:

animal #1

Remarks:

rabbit

Time point:

24 h

Score:

> 8

Remarks on result:

probability of severe irritation

Remarks:

In the rabbit test each animal was treated with 3 different test substances and a positive control (n-hexadecane). Two areas were left free and served as untreated controls.

Results 2

Irritation parameter:

overall irritation score

Basis:

animal #1

Remarks:

rabbit

Time point:

72 h

Score:

> 8

Remarks on result:

probability of severe irritation

Remarks:

In the rabbit test each animal was treated with 3 different test substances and a positive control (n-hexadecane). Two areas were left free and served as untreated controls.

Any other information on results incl. tables

Animal scores based on erythema, oedema, dilation rate and capillary permeability:< 4 mildly irritating, 4-8 moderate irritating, > 8 severely irritating

Human scores: positive reactions < 10% non-irritating 10-40% mildly irritating, 40-70% moderate irritating,> 70% severely irritating.

Species	Rabbit	Guinea pig	Rat	Miniature swine	Human
Result	Severely irritating	Moderately irritating	Not reported	Not irritating	Not irritating

remark : The method used to calculate scoring was not fully described.

Applicant's summary and conclusion

Interpretation of results:

Category 2 (irritant) based on GHS criteria

Conclusions:

Linalyl acetate is classified as a skin irritant substance according to CLP and GHS criteria.
No study was conducted on the lavandin oil heavy fraction iself.
The test item is a natural complex substance (NCS). It is a mixture of several constituents, and linalyl acetate represents about 67% of this UVCB substance.
Literature above provided data for this major compound.

Executive summary:

The NCS is composed of several identified constituents, so it can be considered as a mixture according to the definition of the CLP Regulation. The decision logic for classification of mixtures from the ECHA Guidance on the Application of the CLP Criteria (2015) was used to determine the skin irritation / corrosion potential of the registered substance.

The registered substance has not been tested itself in appropriate in vitro or in vivo tests.

But one of its constituents is classified as skin irritant (Linalyl acetate at 67%) and none other constituents is assessed corrosive.

The single constituent is present above the CLP generic concentration limit of 10% that triggers classification of the mixture. Therefore, the registered substance is classified as a skin irritant substance without further testing according to the Regulation (EC) No 1272/2008.