Registration Dossier

Administrative data

Description of key information

Key value for chemical safety assessment

Skin sensitisation

Link to relevant study records
Reference
Endpoint:
skin sensitisation: in vivo (non-LLNA)
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Qualifier:
according to
Guideline:
other: estimated data
Principles of method if other than guideline:
Prediction is done using the QSAR toolbox version 2.3
GLP compliance:
not specified
Type of study:
Draize test
Species:
guinea pig
Strain:
not specified
Sex:
male/female
Route:
epicutaneous, occlusive
Vehicle:
no data
Reading:
other: Skin sensetization
Clinical observations:
Negative
Remarks on result:
other: Reading: other: Skin sensetization. Clinical observations: Negative.





The prediction was based on dataset comprised from the following descriptors: "Skin sensitisation"
Estimation method: Taking highest mode value from the 5 nearest neighbours
Domain logical expression:Result: In Domain

(("a" and "b" ) and ("c" and "d" ) )

Domain logical expression index: "a"

Similarity boundary:Target: C(C)(=O)c1cc2c(cc(OC)cc2)cc1
Threshold=50%,
Dice(Atom pairs)

Domain logical expression index: "b"

Similarity boundary:Target: C(C)(=O)c1cc2c(cc(OC)cc2)cc1
Threshold=80%,
Dice(Atom pairs)

Domain logical expression index: "c"

Parametric boundary:The target chemical should have a value of log Kow which is >= 2.8

Domain logical expression index: "d"

Parametric boundary:The target chemical should have a value of log Kow which is <= 3.06

Interpretation of results:
not sensitising
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
The estimated skin sensetization test of 1-(6-methoxy-2-naphthyl)ethan-1-one for guinea pigs using QSAR toolbox version 2.3 is found to be not sensetizing. Based on this value and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl)ethan-1-one is not sensitizing via dermal route.
Executive summary:

The estimated skin sensetization test of 1-(6-methoxy-2-naphthyl)ethan-1-one for guinea pigs using QSAR toolbox version 2.3 is found to be not sensetizing. Based on this value and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl) ethan-1-one is not sensitizing via dermal route.

Endpoint conclusion
Endpoint conclusion:
no adverse effect observed (not sensitising)
Additional information:

Skin sensitization:

Based on studies of target substance CAS NO 3900-45-6 and read across reviewed for skin sensitization from reliable sources having Klimisch rating 2 and 4considering the weight of evidence approach.

 The summary of the results are presented below

Sr. No

End point

effect

Species

Remark

1

Skin sensitization

not sensitizing

guinea pig

Predicted data of target chemical

 

2

Skin sensitization

not sensitizing

human

Data is from DEPA for target chemical

3

Skin sensitization

not sensitizing

human

Data is from publication for CAS NO 93-08-3

4

Skin sensitization

mot sensitizing

Humans

Data is from DEPA for CAS NO 93-04-9

 

Based on results summarized in above table for the target chemical CAS NO 3900-45-6 and read across, it can be concluded that the substance is not sensitizing to the skin of human and guinea pig.Thus 1-(6-methoxy-2-naphthyl) ethan-1-one is considered to be not sensitizing to skin as per the criteria of CLP regulation.

Migrated from Short description of key information:

The substance 1-(6-methoxy-2-naphthyl)ethan-1-one was not found to be sensitizing to skin

Justification for selection of skin sensitisation endpoint:

 

The estimated skin sensetization test of 1-(6-methoxy-2-naphthyl)ethan-1-one for guinea pigs using QSAR toolbox version 2.3 is found to be not sensetizing. Based on this value and criteria of classifiction mentioned in new CLP regulation it can be concluded that 1-(6-methoxy-2-naphthyl) ethan-1-one is not sensitizing via dermal route.

Justification for classification or non-classification

The substance 1-(6-methoxy-2-naphthyl)ethan-1-one was not found to be sensitizing to skin as per CLP .