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EC number: 947-817-7 | CAS number: -
An in vitro study was conducted to determine the mutagenic potential of test substance, Oleyl TMAC, according to OECD Guideline 471 and EU Method B.13/B.14, in compliance with GLP. Based on the results of the dose-range finding test, the test substance was tested in the first mutation assay at a concentration range of 0.18 to 52 μg/plate in the absence and presence of 5% (v/v) S9-mix in the tester strains TA1535, TA1537 and TA98. The test substance did not precipitate on the plates at this dose level.Cytotoxicity, as evidenced by a decrease in the number of revertants, reduction of the bacterial background lawn and/or the presence of microcolonies, was observed in all tester strains in the absence and presence of S9-mix, except for the tester strains TA1535 and TA98 in the presence of S9. So, an additional experiment was performed with these two tester strains TA1535 and TA98, using concentration range of 17 to 512 μg/plate of the test substance. No precipitation on the plates was observed at this dose level, however, cytotoxicity was observed in both tester strains. In a follow-up experiment of the assay with additional parameters, the test substance was tested at concentration ranges of 4.7 to 86 μg/plate and 8.5 to 154 μg/plate in the absence and presence of 10% (v/v) S9-mix, respectively, in the tester strains TA1535, TA1537, TA98, TA100 and WP2uvrA. The test substance did not precipitate on the plates at this dose level. Cytotoxicity, was observed in all tester strains in the absence and presence of S9-mix. Except for tester strain WP2uvrA, where no cytotoxicity was observed in the presence of S9 mix. In the second mutation experiment, due to the cytotoxicity, only two to three analyzable dose levels were left for the determination of the mutagenicity of the test substance in the tester strains TA1535, TA1537, TA98 and TA100 in the absence of S9-mix. Furthermore, in tester strain WP2uvrA no dose level with toxicity or precipitate on the plates was observed in the presence of S9-mix. Therefore an additional mutation experiment was performed. In this additional experiment, the test substance was tested at concentration ranges of 0.83 to 15 μg/plate in strains TA1535, TA1537, TA98 and TA100 in the absence of S9 mix and at 86 to 492 μg/plate in tester strain WP2uvrA in the presence of S9 mix. The test substance seemed to show slight precipitation at the highest tested concentration of 15 μg/plate in the tester strains TA98 and TA100 in the presence of a reduced bacterial background. Cytotoxicity, was observed in all tester strains in the absence or presence of S9-mix. Except for tester strain TA1535, where no cytotoxicity was observed in the absence of S9 mix. The test substance did not induce a significant dose-related increase in the number of revertant (His+) colonies in each of the four tester strains (TA1535, TA1537, TA98 and TA100) and in the number of revertant (Trp+) colonies in the tester strain WP2uvrA both in the absence and presence of S9-metabolic activation. These results were confirmed in a follow-up experiment. In this study, acceptable responses were obtained for the negative and strain-specific positive control substances, indicating that the test conditions were adequate and that the metabolic activation system functioned properly. Under the study conditions, it was concluded that the test substance was not mutagenic in Salmonella typhimurium strain TA98, TA100, TA1535 or TA 1537 and E.Coli WP2uvrA, with or without metabolic activation (Gijsbrechts, 2017).
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