2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt

Endpoint summary

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)

Rationale for reliability incl. deficiencies:

other: Data is from QSAR Toolbox version 3.3

Justification for type of information:

QSAR prediction: migrated from IUCLID 5.6

Qualifier:

according to guideline

Guideline:

other: as below

Principles of method if other than guideline:

Prediction is done using QSAR Toolbox version 3.3

GLP compliance:

no

Type of study:

guinea pig maximisation test

Species:

guinea pig

Strain:

not specified

Sex:

not specified

Details on test animals and environmental conditions:

No data

Route:

intradermal and epicutaneous

Vehicle:

no data

Concentration / amount:

Intradermal induction: 1%
Epicutaneous induction: 30%
Epicutaneous challenge: 10%

Route:

epicutaneous, occlusive

Vehicle:

no data

Concentration / amount:

Intradermal induction: 1%
Epicutaneous induction: 30%
Epicutaneous challenge: 10%

No. of animals per dose:

10 males and 10 females

Details on study design:

No data

Challenge controls:

No data

Positive control substance(s):

no

Reading:

1st reading

Hours after challenge:

24

Group:

test chemical

Dose level:

10%

No. with + reactions:

0

Total no. in group:

20

Clinical observations:

not sensitising

Remarks on result:

other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 10%. No with. + reactions: 0.0. Total no. in groups: 20.0. Clinical observations: not sensitising.

The prediction was based on dataset comprised from the following descriptors: "Skin Sensitisation","S W A N"
Estimation method: Takes highest mode value from the 5 nearest neighbours
Domain  logical expression:Result: In Domain

((("a" or "b" or "c" or "d" or "e" )  and "f" )  and ("g" and "h" )  )

Domain logical expression index: "a"

Referential boundary: The target chemical should be classified as Aluminum Compounds OR Phenols (Chronic toxicity) by US-EPA New Chemical Categories

Domain logical expression index: "b"

Referential boundary: The target chemical should be classified as Aryl AND Aryl halide AND Carboxylic acid AND Fused carbocyclic aromatic AND Fused saturated heterocycles AND No functional group found AND Phenol AND Xanthene by Organic Functional groups

Domain logical expression index: "c"

Referential boundary: The target chemical should be classified as Aryl AND Aryl halide AND Carboxylic acid AND No functional group found AND Overlapping groups AND Phenol AND Xanthene by Organic Functional groups (nested)

Domain logical expression index: "d"

Referential boundary: The target chemical should be classified as Acid, aromatic attach [-COOH] AND Alcohol, olefinic attach [-OH] AND Aliphatic Carbon [CH] AND Aliphatic Carbon, two phenyl attach [-C-]  AND Aliphatic Oxygen, two aromatic attach [-O-] AND Aluminium [Al] AND Aromatic Carbon [C] AND Carbonyl, olefinic attach [-C(=O)-] AND Carbonyl, one aromatic attach [-C(=O)-] AND Hydroxy, aromatic attach [-OH] AND Iodide, aromatic attach [-I] AND Miscellaneous sulfide (=S) or oxide (=O) AND Olefinic carbon [=CH- or =C<] AND Oxygen, one aromatic attach [-O-] AND Oxygen, two olefinic attach [-O-] AND Tertiary Carbon by Organic functional groups (US EPA)

Domain logical expression index: "e"

Referential boundary: The target chemical should be classified as Aromatic compound AND Aryl halide AND Aryl iodide AND Carbonic acid derivative AND Carboxylic acid AND Carboxylic acid derivative AND Diarylether AND Ether AND Halogen derivative AND Heterocyclic compound AND Hydroxy compound AND No functional group found AND Phenol by Organic functional groups, Norbert Haider (checkmol)

Domain logical expression index: "f"

Referential boundary: The target chemical should be classified as High (Class III) by Toxic hazard classification by Cramer (with extensions) ONLY

Domain logical expression index: "g"

Parametric boundary:The target chemical should have a value of log Kow which is >= 0.312

Domain logical expression index: "h"

Parametric boundary:The target chemical should have a value of log Kow which is <= 8.22

Interpretation of results:

not sensitising

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The substance 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is estimated to be not sensitising in an in guuinea pig maximisation test..

Executive summary:

Skin sensitisation property of 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium saltis predicted using QSAR toolbox version 3.3.

The substance 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is estimated to be non-sensitising in guinea pig maximisation test.

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed (not sensitising)

Additional information:

Skin sensitisation:

Skin sensitisation property of 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium saltis predicted using QSAR toolbox version 3.3.

The substance 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is estimated to be non-sensitising in guinea pig maximisation test.

Various studies conducted on similar substance (CAS: 16423-68-0) are also reported:

In SCCS OPINION ON CI 45430 (Erythrosine) (2010), the substance does not exhibit the skin sensitization potential as has been observed from the study on guinea pigs for a period of 3 weeks.

In another study by Ikarashi et. al (1996) the test material, Erythrosine, is not sensitizing to the skin of BALB/c strain mice in the sensitive mouse lymph node assay.

Overall reported genetic toxicity studies of target and read-across substance, indicate that 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is not likely to exhibit skin sensitisation can be classified as 'non-hazardous' as per the CLP classification criteria

Migrated from Short description of key information:
Skin sensitisation property of 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is predicted using QSAR toolbox version 3.3.
The substance 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is estimated to be non-sensitising in guinea pig maximisation test.

Justification for selection of skin sensitisation endpoint:
Skin sensitisation property of 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium saltis predicted using QSAR toolbox version 3.3.
The substance 2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is estimated to be non-sensitising in guinea pig maximisation test.

Respiratory sensitisation

Endpoint conclusion

Endpoint conclusion:

no study available

Justification for classification or non-classification

Based on the information available for the target as well as read-across substance,2-(3,6-dihydroxy-2,4,5,7-tetraiodoxanthen-9-yl)benzoic acid, aluminium salt is not likely to result in skin sensitisation and is hence classified as non sensitising as per the CLP criteria.