Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]]bisnaphthalene-1,5-disulphonate

Endpoint summary

Description of key information

Skin Sensitization:

The skin sensitization potential of Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was predicted to be not sensitizing to the skin of female guinea pigs.

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

Qualifier:

according to guideline

Guideline:

other: Estimated data

Principles of method if other than guideline:

Prediction was done using OECD QSAR toolbox v3.3

GLP compliance:

not specified

Specific details on test material used for the study:

Name of the test chemical: Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino (1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]]bisnaphthalene-1,5-disulphonate
Molecular formula: C58H30Cl2N14Na8O26S8
Molecular weight: 1850.3 g/mol
Smiles Notation: [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].c1(c(cc(cc1)Nc1nc(nc(n1)Cl)Nc1cc2cc(c(c(c2cc1)O)\N=N\c1c(c2cccc(c2cc1)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])c1c(cc(cc1)Nc1nc(nc(n1)Cl)Nc1cc2cc(c(c(c2cc1)O)\N=N\c1c(c2cccc(c2cc1)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-]
InChI: 1S/C58H38Cl2N14O26S8.8Na/c59-53-65-55(61-27-7-11-31-25(19-27)21-45(105(89,90)91)47(49(31)75)73-71-39-17-15-35-37(51(39)107(95,96)97)3-1-5-41(35)101(77,78)79)69-57(67-53)63-29-9-13-33(43(23-29)103(83,84)85)34-14-10-30(24-44(34)104(86,87)88)64-58-68-54(60)66-56(70-58)62-28-8-12-32-26(20-28)22-46(106(92,93)94)48(50(32)76)74-72-40-18-16-36-38(52(40)108(98,99)100)4-2-6-42(36)102(80,81)82;;;;;;;;/h1-24,75-76H,(H,77,78,79)(H,80,81,82)(H,83,84,85)(H,86,87,88)(H,89,90,91)(H,92,93,94)(H,95,96,97)(H,98,99,100)(H2,61,63,65,67,69)(H2,62,64,66,68,70);;;;;;;;/q;8*+1/p-8/b73-71+,74-72+;;;;;;;;
Substance Type: Organic
Physical State: Solid

Species:

guinea pig

Strain:

not specified

Sex:

female

Route:

intradermal and epicutaneous

Vehicle:

not specified

Adequacy of induction:

not specified

No.:

#1

Route:

intradermal and epicutaneous

Vehicle:

not specified

Adequacy of challenge:

not specified

No. of animals per dose:

20

Details on study design:

no data available

Challenge controls:

no data available

Positive control substance(s):

not specified

Reading:

1st reading

Group:

test chemical

Clinical observations:

no sllergic reaction observed

Remarks on result:

no indication of skin sensitisation

The prediction was based on dataset comprised from the following descriptors: "Skin Sensitisation"
Estimation method: Takes highest mode value from the 7 nearest neighbours
Domain  logical expression:Result: In Domain

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

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Anion OR Aromatic compound OR Azo compound OR Cation OR Halogen derivative OR Hydroxy compound OR Phenol OR Sulfonic acid derivative by Organic functional groups, Norbert Haider (checkmol) ONLY

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Alcohol, olefinic attach [-OH] OR Aliphatic Nitrogen, one aromatic attach [-N] OR Aliphatic Nitrogen, two aromatic attach [-N-] OR Amino Triazine/Pyrazine/Pyrimidine  OR Aromatic Carbon [C] OR Aromatic Nitrogen OR Azo [-N=N-] OR Chlorine, aromatic attach [-Cl] OR Chlorine, olefinic attach [-Cl] OR Hydroxy, aromatic attach [-OH] OR Miscellaneous sulfide (=S) or oxide (=O) OR Nitrogen, two or tree olefinic attach [>N-] OR Olefinic carbon [=CH- or =C<] OR Oxygen, one aromatic attach [-O-] OR Suflur {v+4} or {v+6} OR Sulfonate, aromatic attach [-SO2-O] OR Sym-Triazine ring  by Organic functional groups (US EPA) ONLY

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Aromatic amine OR Aromatic heterocyclic halide OR Aryl OR Aryl halide OR Azo OR Biphenyl OR Fused carbocyclic aromatic OR Overlapping groups OR Phenol OR Sulfonic acid by Organic Functional groups (nested) ONLY

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Aromatic amine OR Aromatic heterocyclic halide OR Aryl OR Aryl halide OR Azo OR Biphenyl OR Fused carbocyclic aromatic OR Naphtalene OR Phenol OR Sulfonic acid OR Triazine by Organic Functional groups ONLY

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as No alert found by DNA binding by OASIS v.1.3

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as AN2 OR AN2 >>  Michael-type addition, quinoid structures OR AN2 >>  Michael-type addition, quinoid structures >> Quinoneimines OR AN2 >>  Michael-type addition, quinoid structures >> Quinones OR AN2 >> Nucleophilic addition to alpha, beta-unsaturated carbonyl compounds OR AN2 >> Nucleophilic addition to alpha, beta-unsaturated carbonyl compounds >> alpha, beta-Unsaturated Aldehydes OR AN2 >> Schiff base formation OR AN2 >> Schiff base formation >> alpha, beta-Unsaturated Aldehydes OR AN2 >> Thioacylation via nucleophilic addition after cysteine-mediated thioketene formation OR AN2 >> Thioacylation via nucleophilic addition after cysteine-mediated thioketene formation >> Haloalkenes with Electron-Withdrawing Groups OR Michael addition OR Michael addition >> Quinone type compounds OR Michael addition >> Quinone type compounds >> Quinone methides OR Non-covalent interaction OR Non-covalent interaction >> DNA intercalation OR Non-covalent interaction >> DNA intercalation >> Fused-Ring Primary Aromatic Amines OR Non-covalent interaction >> DNA intercalation >> Quinones OR Radical OR Radical >> Radical mechanism via ROS formation (indirect) OR Radical >> Radical mechanism via ROS formation (indirect) >> Fused-Ring Primary Aromatic Amines 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 >> ROS formation after GSH depletion OR Radical >> ROS formation after GSH depletion (indirect) OR Radical >> ROS formation after GSH depletion (indirect) >> Quinoneimines OR Radical >> ROS formation after GSH depletion >> Quinone methides 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 >> Nucleophilic attack after metabolic nitrenium ion formation OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Fused-Ring Primary Aromatic Amines OR SN1 >> Nucleophilic attack after metabolic nitrenium ion formation >> Single-Ring Substituted Primary Aromatic Amines OR SN2 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 >> Haloalkenes with Electron-Withdrawing Groups OR SN2 >> Alkylation, direct acting epoxides and related after P450-mediated metabolic activation >> Polycyclic Aromatic Hydrocarbon Derivatives OR SN2 >> Direct acting epoxides formed after metabolic activation OR SN2 >> Direct acting epoxides formed after metabolic activation >> Quinoline Derivatives OR SN2 >> SN2 at an activated carbon atom OR SN2 >> SN2 at an activated carbon atom >> Quinoline Derivatives by DNA binding by OASIS v.1.3

Domain logical expression index: "g"

Referential boundary: The target chemical should be classified as Non binder, MW>500 by Estrogen Receptor Binding

Domain logical expression index: "h"

Referential boundary: The target chemical should be classified as Moderate binder, NH2 group OR Moderate binder, OH grooup OR Non binder, impaired OH or NH2 group OR Non binder, non cyclic structure OR Non binder, without OH or NH2 group OR Strong binder, OH group OR Very strong binder, OH group OR Weak binder, NH2 group OR Weak binder, OH group by Estrogen Receptor Binding

Domain logical expression index: "i"

Referential boundary: The target chemical should be classified as No alert found by DNA binding by OECD

Domain logical expression index: "j"

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

Domain logical expression index: "k"

Referential boundary: The target chemical should be classified as Alkali Earth AND Halogens AND Non-Metals by Groups of elements

Domain logical expression index: "l"

Referential boundary: The target chemical should be classified as Alkaline Earth OR Metalloids OR Transition Metals by Groups of elements

Domain logical expression index: "m"

Referential boundary: The target chemical should be classified as Aromatic amine AND Aromatic heterocyclic halide AND Aryl AND Aryl halide AND Azo AND Biphenyl AND Fused carbocyclic aromatic AND Naphtalene AND Phenol AND Sulfonic acid AND Triazine by Organic Functional groups ONLY

Domain logical expression index: "n"

Parametric boundary:The target chemical should have a value of log BCF max which is >= 0.961 log(L/kg wet)

Domain logical expression index: "o"

Parametric boundary:The target chemical should have a value of log BCF max which is <= 1.85 log(L/kg wet)

Interpretation of results:

other: Negative

Conclusions:

Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was predicted to be not sensitizing to the skin of female guinea pigs.

Executive summary:

The skin sensitization potential of Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was predicted to be not sensitizing to the skin of female guinea pigs.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not sensitising)

Additional information:

Skin Sensitization:

Various studies have been investigated to ascertain the degree of dermal sensitization caused by Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate. These include in vivo experiments in guinea pigs for the target chemical as well as its structurally similar read across chemicals, 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[2-[4 -[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-, sodium salt (1:4) (Reactive Red 198) [CAS: 145017-98-7],trisodium 5-amino-3-[(E)-2-(4-{4-[(E)-2-(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazen-1-yl]phenyl}phenyl)diazen-1-yl]-4-hydroxynaphthalene-2,7-disulfonate(Chlorazol Black BH)[CAS: 2429-73-4] and Tetra sodium 1-acetamido-2-hydroxy-3-(4-((4-sulphonatophenylazo)-7-sulphonato-1-naphthylazo))naphthalene-4,6-disulphonate (Brilliant Black 1)[CAS: 2519-30-4].The experimental results have also been compared with the predictions obtained from OECD QSAR toolbox.

The skin sensitization potential of Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was estimated by SSS (2018) using OECD QSAR toolbox v3.3 with log kow as the primary descriptor. Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate was predicted to be not sensitizing to the skin of female guinea pigs.

This is supported by the results of the Patch tests performed by Bianca Maria Manzini et.al (Contact Dermatitis, 1996, 35, 313) on 312 consecutive patients to determine the allergic potential of the structurally similar read across chemical, , 2,7-Naphthalenedisulfonic acid, 5-[[4-chloro-6-[(3-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[2-[4 -[[2-(sulfooxy)ethyl]sulfonyl]phenyl]diazenyl]-, sodium salt (1:4) (Reactive Red 198) [CAS: 145017-98-7].

312 consecutive patients underwent patch tests with reactive dyes to determine the allergic contact dermatitis potential.

The dyes tested were provided as powder by Hoechst and were dispersed in petrolatum. The dyes were applied to the healthy sin of the back with Finn Chambers, on Scanpor tape for 3 days and read at 3 hours after removal and at 4 days according to ICDRG Scoring pattern. The concentration used was 5% in 119 patients and 10% in 193 patients.

No positive allergic or irritant reactions were observed in the volunteers when tested with 5% and 10% concentration of the dye.

Hence, Reactive Red 198 can be considered to not sensitizing to human skin.

Modified Draize- Shelanski Repeat Insult Patch Test was performed (OTS0215154, NTRL report, last updated 1983) on human volunteers to ascertain the degree of sensitization caused by the structurally similar read across chemical,trisodium 5-amino-3-[(E)-2-(4-{4-[(E)-2-(7-amino-1-hydroxy-3-sulfonatonaphthalen-2-yl)diazen-1-yl]phenyl}phenyl)diazen-1-yl]-4-hydroxynaphthalene-2,7-disulfonate(Chlorazol Black BH)[CAS: 2429-73-4]. Undiluted Chlorazol Black BH [CAS: 2429-73-4] was applied to the patch sites on the backs of 208 male volunteers for ten alternate-day 24-hour period under occlusion. Following a seven day rest period, challenge patches of Chlorazol Black BH [CAS:2429-73-4] were applied to the fresh sites on the backs of 208 male volunteers similar to the induction phase for 24 hours. The challenge sites were evaluated 24 hours after removal of the challenge patches.

No instances of contact sensitization were observed in any of the volunteers.

Hence, Chlorazol Black BH [CAS: 2429-73-4] can be considered to be not sensitizing to skin.

The above results are supported by the experimental study summarized in Joint FAO/WHO Expert Committee on Food Additives; (WHO Food Additives Series 16; IPCS INCHEM; 1975; for the structurally similar read across chemical, Tetra sodium 1-acetamido-2-hydroxy-3-(4-((4-sulphonatophenylazo)-7-sulphonato-1-naphthylazo))naphthalene-4,6-disulphonate (Brilliant Black 1)[CAS: 2519-30-4].

Since the guinea pigs did not elicit any sensitizing effect, the test chemical Brilliant Black 1 (CAS No: 2519-30-4) was considered to be not sensitizing to the guinea pigs.

Based on the available studies for the target as well as its structurally similar read across chemicals and applying the weight of evidence approach, Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate  can be considered to be not sensitizing to skin. Comparing the above annotations with the criteria of CLP regulation, it can be classified under the category “Not Classified”.

Respiratory sensitisation

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

Available data for Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate indicates that it is not likely to cause any dermal sensitization to skin.

Octasodium 2,2'-[(2,2'-disulphonato[1,1'-biphenyl]-4,4'-diyl)bis[imino(6-chloro-1,3,5-triazine-4,2-diyl)imino(1-hydroxy-3-sulphonatonaphthalene-6,2-diyl)azo]] bisnaphthalene-1,5-disulphonate can be considered to be not sensitizer to skin and can be classified under the category “Not Classified” as per CLP regulation.