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:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Data generated using QSAR developed by the OECD
Justification for type of information:
QSAR prediction: migrated from IUCLID 5.6
Reference:
Composition 0
Qualifier:
according to
Guideline:
other:
Principles of method if other than guideline:
Data is predicted using the QSAR toolbox version 3.1
GLP compliance:
not specified
Type of study:
guinea pig maximisation test
Test material information:
Composition 1
Species:
guinea pig
Strain:
not specified
Sex:
male/female
Route:
other: No data
Vehicle:
no data
Route:
other: No data
Vehicle:
no data
Reading:
1st reading
Group:
test group
Clinical observations:
Sensitizing
Remarks on result:
other: Reading: 1st reading. Group: test group. Clinical observations: Sensitizing.

The prediction was based on dataset comprised from the following descriptors: "S M W N"
Estimation method: Takes highest mode value from the 5 nearest neighbours
Domain  logical expression:Result: Out of Domain

(((("a" or "b" or "c" or "d" )  and ("e" and ( not "f") )  )  and ("g" and ( not "h") )  )  and ("i" and "j" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as SN1 AND SN1 >> Nitrenium Ion formation AND SN1 >> Nitrenium Ion formation >> Tertiary aromatic amine by DNA binding by OECD

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Alcohol AND Aromatic amine AND Aryl AND Fused carbocyclic aromatic AND Naphtalene by Organic functional groups

Domain logical expression index: "c"

Similarity boundary:Target: c1(C(O)(c2c3c(c(Nc4ccccc4)cc2)cccc3)c2ccc(N(C)C)cc2)ccc(N(C)C)cc1
Threshold=50%,
Dice(Atom centered fragments)

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Group 14 - Carbon C AND Group 15 - Nitrogen N AND Group 16 - Oxygen O by Chemical elements

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as No alert found by DNA binding by OASIS v.1.1

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as Acylation OR Acylation >> Direct acyation involving a leaving group OR Acylation >> Direct acyation involving a leaving group >> Geminal Polyhaloalkanes OR Michael addition OR Michael addition >> Quinone type compounds OR Michael addition >> Quinone type compounds >> Quinones OR Radical OR Radical >> Radical mechanism by ROS formation OR Radical >> Radical mechanism by ROS formation >> Geminal Polyhaloalkanes OR Radical >> Radical mechanism by ROS formation >> Nitro Compounds OR Radical >> Radical mechanism by ROS formation >> Quinones OR Radical >> ROS formation after GSH depletion OR Radical >> ROS formation after GSH depletion >> Aromatic and Heterocyclic Primary Amines OR Schiff base fomers OR Schiff base fomers >> Direct acting Schiff base formers OR Schiff base fomers >> Direct acting Schiff base formers >> Geminal Polyhaloalkanes OR SN1 OR SN1 >> Nitrenium and/or Carbenium ion formation OR SN1 >> Nitrenium and/or Carbenium ion formation >> Urea Derivatives OR SN1 >> Nitrenium ion formation OR SN1 >> Nitrenium ion formation >> Aromatic and Heterocyclic Primary Amines OR SN1 >> Nitrenium ion formation >> N-hydroxylamines OR SN1 >> Nitrenium ion formation >> Nitro Compounds OR SN1 >> Non-enzymatic nitroso radical and/or nirtosonium cation formation OR SN1 >> Non-enzymatic nitroso radical and/or nirtosonium cation formation >> Urea Derivatives OR SN2 OR SN2 >> Nucleophilic substitution at sp3 Carbon atom OR SN2 >> Nucleophilic substitution at sp3 Carbon atom >> Geminal Polyhaloalkanes OR SN2 >> SN2 at sulfur atom OR SN2 >> SN2 at sulfur atom >> Sulfonyl Halides by DNA binding by OASIS v.1.1

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as (!Undefined)Group All Lipid Solubility < 0.01 g/kg AND (!Undefined)Group CN Lipid Solubility < 0.4 g/kg AND Group All Melting Point > 200 C AND Group CN Aqueous Solubility < 0.0001 g/L AND Group CN Aqueous Solubility < 0.1 g/L AND Group CN log Kow > 4.5 AND Group CN log Kow > 5.5 AND Group CN Melting Point > 180 C AND Group CN Molecular Weight > 290 g/mol AND Group CN Vapour Pressure < 0.001 Pa by Skin irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as (!Undefined)Group All log Kow < -3.1 OR (!Undefined)Group All log Kow > 9 OR (!Undefined)Group All Melting Point > 200 C OR (!Undefined)Group CN Melting Point > 180 C OR (!Undefined)Group CN Vapour Pressure < 0.001 Pa OR (!Undefined)Group CNHal Lipid Solubility < 4 g/kg OR (!Undefined)Group CNHal Lipid Solubility < 400 g/kg OR (!Undefined)Group CNS log Kow < 0.5 OR (!Undefined)Group CNS log Kow < -2 OR (!Undefined)Group CNS Melting Point > 120 C OR (!Undefined)Group CNS Melting Point > 50 C OR (!Undefined)Group CNS Surface Tension > 62 mN/m OR Group All log Kow < -3.1 OR Group All log Kow > 9 OR Group CN Molecular Weight > 540 g/mol OR Group CNS log Kow < 0.5 OR Group CNS log Kow < -2 OR Group CNS Melting Point > 120 C OR Group CNS Melting Point > 50 C by Skin irritation/corrosion Exclusion rules by BfR

Domain logical expression index: "i"

Parametric boundary:The target chemical should have a value of log Kow which is >= 3.98

Domain logical expression index: "j"

Parametric boundary:The target chemical should have a value of log Kow which is <= 8.25

Interpretation of results:
sensitising
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
The substance α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4) was found to be sensitizing to skin of Guinea pig
Executive summary:

The substance α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4 ) was found to be sensitizing to skin of Guinea pig.

Endpoint conclusion
Endpoint conclusion:
adverse effect observed (sensitising)
Additional information:

The substance α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4 with < 0.1 % Michler's Ketone) was found to be sensitizing to skin of Guinea pig based upon the prediction using the QSAR model. the supporting study also shows 6 out of 11 eczema patients were found to be sensitized to patch tests using a 2% aqueous solution of malachite green. Thus from above studies it can be concluded that α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4 with < 0.1 % Michler's Ketone) was considered as sensitizing in animals.


Migrated from Short description of key information:
The substance α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4 with < 0.1 % Michler's Ketone) was found to be sensitizing to skin of Guinea pig based upon the prediction using the QSAR model.

Justification for selection of skin sensitisation endpoint:
Model considered relaible by OECD

Justification for classification or non-classification

The substance α,α-bis[4-(dimethylamino)phenyl]-4-(phenylamino)naphthalene-1-methanol (Solvent Blue 4 with < 0.1 % Michler's Ketone) was classified as sensitizing to skin of Guinea pig based upon the prediction value of the key study