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Description of key information

Skin Sensitization:

The skin sensitization potential of 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was estimated by SSS (2017) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was predicted to be not sensitizing to the skin of female CBA mice.

Key value for chemical safety assessment

Skin sensitisation

Link to relevant study records
Reference
Endpoint:
skin sensitisation
Remarks:
in vivo
Type of information:
(Q)SAR
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model and falling into its applicability domain, with limited documentation / justification
Justification for type of information:
data is from OECD QSAR toolbox v3.3 and the QMRF report has been attached
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: Estimated data
Principles of method if other than guideline:
Prediction was done using OECD QSAR toolbox v3.3
GLP compliance:
not specified
Test material information:
Composition 1
Specific details on test material used for the study:
- Name of test material: 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid
- IUPAC name: 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid
- Molecular formula: C17H14N2O8S2
- Molecular weight: 438.4356 g/mole
- Smiles : c1cc(cc(c1)N)C(=O)Nc2ccc(c3c2c(cc(c3)S(=O)(=O)O)O)S(=O)(=O)O
- Inchl: 1S/C17H14N2O8S2/c18-10-3-1-2-9(6-10)17(21)19-13-4-5-15(29(25,26)27)12-7-11(28(22,23)24)8-14(20)16(12)13/h1-8,20H,18H2,(H,19,21)(H,22,23,24)(H,25,26,27)
- Substance type: Organic
- Physical state: Solid
Species:
mouse
Strain:
CBA
Sex:
female
Details on test animals and environmental conditions:
no data available
Vehicle:
not specified
Concentration:
5%
No. of animals per dose:
4
Details on study design:
no data available
Positive control substance(s):
not specified
Statistics:
no data available
Positive control results:
no data available
Other effects / acceptance of results:
no data available
Parameter:
SI
Variability:
no data available
Test group / Remarks:
no data available
Remarks on result:
no indication of skin sensitisation based on QSAR/QSPR prediction
Cellular proliferation data / Observations:
Not sensitizing to mice skin.

The prediction was based on dataset comprised from the following descriptors: "Skin Sensitisation"
Estimation method: Takes highest mode value from the 9 nearest neighbours
Domain  logical expression:Result: In Domain

(((((("a" or "b" or "c" or "d" or "e" or "f" or "g" or "h" )  and ("i" and ( not "j") )  )  and "k" )  and "l" )  and ("m" and ( not "n") )  )  and ("o" and "p" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Naphthalene sulfonic acids, condensates by OECD HPV Chemical Categories

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Anilines (Acute toxicity) by US-EPA New Chemical Categories

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Non-covalent interaction AND Non-covalent interaction >> DNA intercalation AND Non-covalent interaction >> DNA intercalation >> DNA Intercalators with Carboxamide Side Chain by DNA binding by OASIS v.1.3

Domain logical expression index: "d"

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

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as Strong binder, NH2 group AND Strong binder, OH group by Estrogen Receptor Binding

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as Acylation AND Acylation >> Ester aminolysis AND Acylation >> Ester aminolysis >> Amides by Protein binding by OASIS v1.3

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as Acylation AND Acylation >> Direct Acylation Involving a Leaving group AND Acylation >> Direct Acylation Involving a Leaving group >> Acetates by Protein binding by OECD

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as Acid moiety AND Amides AND Anilines (Unhindered) AND Phenol Amines AND Phenols by Aquatic toxicity classification by ECOSAR

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as Non-covalent interaction AND Non-covalent interaction >> DNA intercalation AND Non-covalent interaction >> DNA intercalation >> DNA Intercalators with Carboxamide Side Chain by DNA binding by OASIS v.1.3

Domain logical expression index: "j"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >>  Michael-type addition, quinoid structures OR AN2 >>  Michael-type addition, quinoid structures >> Quinones OR AN2 >> Carbamoylation after isocyanate formation OR AN2 >> Carbamoylation after isocyanate formation >> N-Hydroxylamines OR AN2 >> Michael-type addition on alpha, beta-unsaturated carbonyl compounds OR AN2 >> Michael-type addition on alpha, beta-unsaturated carbonyl compounds >> Four- and Five-Membered Lactones OR AN2 >> Schiff base formation by aldehyde formed after metabolic activation OR AN2 >> Schiff base formation by aldehyde formed after metabolic activation >> Geminal Polyhaloalkane Derivatives OR AN2 >> Shiff base formation after aldehyde release OR AN2 >> Shiff base formation after aldehyde release >> Specific Acetate Esters OR AN2 >> Shiff base formation for aldehydes OR AN2 >> Shiff base formation for aldehydes >> Geminal Polyhaloalkane Derivatives OR No alert found OR Non-covalent interaction >> DNA intercalation >> Amino Anthraquinones OR Non-covalent interaction >> DNA intercalation >> Coumarins OR Non-covalent interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines OR Non-covalent interaction >> DNA intercalation >> Quinones OR Non-specific OR Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    OR Non-specific >> Incorporation into DNA/RNA, due to structural analogy with  nucleoside bases    >> Specific Imine and Thione Derivatives OR Radical OR Radical >> Radical mechanism via ROS formation (indirect) OR Radical >> Radical mechanism via ROS formation (indirect) >> Amino Anthraquinones OR Radical >> Radical mechanism via ROS formation (indirect) >> Coumarins OR Radical >> Radical mechanism via ROS formation (indirect) >> Diazenes OR Radical >> Radical mechanism via ROS formation (indirect) >> Fused-Ring Primary Aromatic Amines OR Radical >> Radical mechanism via ROS formation (indirect) >> Geminal Polyhaloalkane Derivatives OR Radical >> Radical mechanism via ROS formation (indirect) >> N-Hydroxylamines OR Radical >> Radical mechanism via ROS formation (indirect) >> Nitro Azoarenes OR Radical >> Radical mechanism via ROS formation (indirect) >> Nitroaniline Derivatives OR Radical >> Radical mechanism via ROS formation (indirect) >> Nitroarenes with Other Active Groups OR Radical >> Radical mechanism via ROS formation (indirect) >> Nitrophenols, Nitrophenyl Ethers and Nitrobenzoic Acids OR Radical >> Radical mechanism via ROS formation (indirect) >> p-Substituted Mononitrobenzenes OR Radical >> Radical mechanism via ROS formation (indirect) >> Quinones OR Radical >> Radical mechanism via ROS formation (indirect) >> Single-Ring Substituted Primary Aromatic Amines OR Radical >> Radical mechanism via ROS formation (indirect) >> Specific Imine and Thione Derivatives OR SN1 OR SN1 >> Alkylation after metabolically formed carbenium ion species OR SN1 >> Alkylation after metabolically formed carbenium ion species >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN1 >> Carbenium ion formation OR SN1 >> Carbenium ion formation >> Alpha-Haloethers OR SN1 >> Nucleophilic attack after carbenium ion formation OR SN1 >> Nucleophilic attack after carbenium ion formation >> Specific Acetate Esters OR SN1 >> Nucleophilic attack after diazonium or carbenium ion formation OR SN1 >> Nucleophilic attack after diazonium or carbenium ion formation >> Nitroarenes with Other Active Groups OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Amino Anthraquinones OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Fused-Ring Primary Aromatic Amines OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> N-Hydroxylamines OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation >> Nitro Azoarenes OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation >> Nitroaniline Derivatives OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation >> Nitroarenes with Other Active Groups OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation >> Nitrophenols, Nitrophenyl Ethers and Nitrobenzoic Acids OR SN1 >> Nucleophilic attack after reduction and nitrenium ion formation >> p-Substituted Mononitrobenzenes OR SN1 >> Nucleophilic substitution on diazonium ions OR SN1 >> Nucleophilic substitution on diazonium ions >> Specific Imine and Thione Derivatives OR SN2 OR SN2 >> Acylation OR SN2 >> Acylation >> Specific Acetate Esters OR SN2 >> Acylation involving a leaving group  OR SN2 >> Acylation involving a leaving group  >> Geminal Polyhaloalkane Derivatives OR SN2 >> Acylation involving a leaving group after metabolic activation OR SN2 >> Acylation involving a leaving group after metabolic activation >> Geminal Polyhaloalkane Derivatives OR SN2 >> Alkylation, direct acting epoxides and related OR SN2 >> Alkylation, direct acting epoxides and related >> Epoxides and Aziridines OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN2 >> Alkylation, nucleophilic substitution at sp3-carbon atom OR SN2 >> Alkylation, nucleophilic substitution at sp3-carbon atom >> Sulfonates and Sulfates OR SN2 >> Alkylation, ring opening SN2 reaction OR SN2 >> Alkylation, ring opening SN2 reaction >> Four- and Five-Membered Lactones OR SN2 >> Direct acting epoxides formed after metabolic activation OR SN2 >> Direct acting epoxides formed after metabolic activation >> Coumarins OR SN2 >> Direct acylation involving a leaving group OR SN2 >> Direct acylation involving a leaving group >> Acyl Halides OR SN2 >> DNA alkylation OR SN2 >> DNA alkylation >> Alkylphosphates, Alkylthiophosphates and Alkylphosphonates OR SN2 >> DNA alkylation >> Vicinal Dihaloalkanes OR SN2 >> Internal SN2 reaction with aziridinium and/or cyclic sulfonium ion formation (enzymatic) OR SN2 >> Internal SN2 reaction with aziridinium and/or cyclic sulfonium ion formation (enzymatic) >> Vicinal Dihaloalkanes OR SN2 >> Nucleophilic substitution at sp3 Carbon atom OR SN2 >> Nucleophilic substitution at sp3 Carbon atom >> Specific Acetate Esters OR SN2 >> Nucleophilic substitution at sp3 carbon atom after thiol (glutathione) conjugation OR SN2 >> Nucleophilic substitution at sp3 carbon atom after thiol (glutathione) conjugation >> Geminal Polyhaloalkane Derivatives OR SN2 >> SN2 at sp3-carbon atom OR SN2 >> SN2 at sp3-carbon atom >> Alpha-Haloethers OR SN2 >> SN2 attack on activated carbon Csp3 or Csp2 OR SN2 >> SN2 attack on activated carbon Csp3 or Csp2 >> Nitroarenes with Other Active Groups by DNA binding by OASIS v.1.3

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as No superfragment by Superfragments ONLY

Domain logical expression index: "l"

Referential boundary: The target chemical should be classified as Bioavailable by Lipinski Rule Oasis ONLY

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Not categorized by Repeated dose (HESS)

Domain logical expression index: "n"

Referential boundary: The target chemical should be classified as Tamoxifen (Hepatotoxicity) Alert OR Thiocarbamates/Sulfides (Hepatotoxicity) No rank by Repeated dose (HESS)

Domain logical expression index: "o"

Parametric boundary:The target chemical should have a value of log Kow which is >= -2.62

Domain logical expression index: "p"

Parametric boundary:The target chemical should have a value of log Kow which is <= 3.71

Interpretation of results:
other: Negative
Conclusions:
4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was predicted to be not sensitizing to the skin of female CBA mice.
Executive summary:

The skin sensitization potential of 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was estimated by SSS (2017) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was predicted to be not sensitizing to the skin of female CBA mice.

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

Skin Sensitization:

Several studies were performed to ascertain the extent of dermal sensitization caused by 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acidin living organisms. These studies include in vivo studies in guinea pigs as well as predicted data for the target chemical as well its structurally similar read across substances, Disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate[CAS: 3734-67-6], D&C Red 33[CAS: 3567-66-6]. Thepredicted data using the OECD QSAR toolbox has also been compared with the experimental data.

 

 

The skin sensitization potential of 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was estimated by SSS (2017) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid was predicted to be not sensitizing to the skin of female CBA mice.

This result is supported by the experimental study summarized in Opinion on Acid Red 33 ,Scientific Committee on Consumer Safety (SCCS), SCCP/1102/07; for thestructurally similar read across substances, Disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate[CAS: 3734-67-6].The study wasperformed in 15 (10 test and 5 control) female guinea pigs. The intradermal induction of sensitisation in the test group was performed in the nuchal region with a 5% dilution of the test item in 1% CMC and in an emulsion of Freund's Complete Adjuvant (FCA) / physiological saline. The epidermal induction of sensitisation was conducted for 18 hours under occlusion with the test item at 25% in 1% CMC one week after the intradermal induction and following pre-treatment of the test areas with 10% sodium-laureth-sulfate (SLS), 24 hours prior to application of the test item. The animals of the control group were intradermally induced with 1% CMC and FCA/physiological saline and epidermally induced with 1% CMC under occlusion following pre-treatment with 10% SLS. Cutaneous reactions were evaluated at 24 and 48 hours after removal of the dressing. No skin sensitization reaction was observed. Hence, disodium 5-amino-4-hydroxy-3-(phenylazo’)naphthalene-2,7-disulphonate(3567 -66 -6) was considered to be not skin sensitizing in guinea pig.

These studies are supported by the experimental study summarized in Scientific Committee on Cosmetology (seventh series), 1988; for the structurally similar read across substance, Disodium 5-acetamido-4-hydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonate[CAS: 3734-67-6]. Guinea pigs were given two times 4 intradermal injections of 0.1 ml of a 7.5% solution in saline during the induction phase.14 days after second injection, a challenge exposure was conducted. In the challenge exposure, single intradermal injection of a 3% solution in saline was administered to the guinea pigs.

Signs of sensitization were not observed. Hence RED 2G (3734-67-6)was considered  to be non sensitizing after challenge exposure in guinea pig.

Based on the available data for the target chemical, structurally similar read across substances, 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid is not likely to cause any dermal sensitization. Hence, by applying the weight of evidence approach, 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid can be considered not sensitizing to skin and classified under the category “Not Classified” as per CLP criteria.

Respiratory sensitisation

Endpoint conclusion
Endpoint conclusion:
no study available

Justification for classification or non-classification

Available data for 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid indicates that it is not likely to cause any dermal sensitization to skin.

4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid can be considered to be not sensitizer to skin and can be classified under the category “Not Classified” as per CLP regulation.