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The mutagen assay was scored as the ratio of the number of colonies (total revertants) in the experimental plates over the number of colonies in the control plates (spontaneous revertants). this was taken as the mutagenic ratio. A compounds was considered to be mutagenic if its mutagenic ratio was ≥ 2. The criterion for a strong mutagen was a compound having a mutagenic ratio ≥ 2 at concentration less than 100 µg/plate. A weak mutagen requires greater than 100 µg/plate to produce ratio ≥2.

Short description of key information:
Mutagenesis was measured relative to the known mutagen ethyl methanesulfonate.

Endpoint Conclusion: No adverse effect observed (negative)

Justification for classification or non-classification