Reaction products of 4-Diazo-3,4-dihydro-7-nitro-3-oxo-1-naphthalenesulfonic acid coupled with 7-Amino-4-hydroxy-2-naphthalenesulfonic acid, subsequently chelated with Chromium(3+) and cobalt(3+), further mixed with reaction products of 2,4,6-Trichloro-1,3,5-triazine and Ethanol, 2-[(4-aminophenyl)sulfonyl]-, 1-(hydrogen sulfate), sodium salts

Endpoint summary

Key value for chemical safety assessment

Genetic toxicity in vitro

Description of key information

Gene mutation study in bacteria

Everzol SR98 have two components, metal complex 1 and metal complex 2. Both metal complexes may be dissociated into coordination compound 3 and metal ions Cr3+ and Co 3+ under the effect of gastric acid. We applied two Ames Test prediction softwares, ACD/Tox Ames Test prediction model and DS/TOPKAT Ames Test QSAR model, to predict a positive Ames Test result for the compound 3 in a very low possibility. On the other hand, eitherCr3+ or Co2+exhibited genotoxicity according to literature-reported data. Furthermore, Co3+ may be transferred into Co2+ in vivo. Therefore, it would be rational to predict both metal complexrs 1 and 2 in Everzol SR98 would have genotoxicity, a positive result in Ames Test in a high possibility.

Link to relevant study records

Reference

Endpoint:

in vitro gene mutation study in bacteria

Type of information:

(Q)SAR

Adequacy of study:

key study

Study period:

January 9, 2020

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 adequate and reliable documentation / justification

Justification for type of information:

1. SOFTWARE
ACD/TOX and DS/TOPKAT
2. MODEL
ACD/Tox Ames Test module and QSTR model of DS/TOPKAT

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 471 (Bacterial Reverse Mutation Assay)

Genotoxicity:

positive

Remarks on result:

mutagenic potential (based on QSAR/QSPR prediction)

Conclusions:

It would be rational to predict both metal complexes 1 and 2 in Everzol SR98 would have genotoxicity, a positive result in Ames Test in a high possibility.

Executive summary:

In this report, we take advantage of ACD/TOX Ames Test result prediction module and DS/TOPKAT Ames Test result QSTR model, respectively, to predict the genotoxicity (Ames Test) of two metal complex components 1 and 2 of Everzol SR98 in combination with corresponding literatures. Althought the coordination agent 3 in both metal complexes was predicted to have a positive Ames Test result in a very low possibility by both ACD/Tox Ames Test and DS/TOPKAT Ames test QSTR models, the literature data indicated that both Cr3+ and Co3+ may have genotoxicity. Therefore, both components 1 and 2 in Everzol SR98 would have a positive result in Ames Test with a high possibility.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed (positive)