1 A suitable method has been developed for generating atmospheres of zinc oxide/ hexachloroethane smoke (ZnHCE).
2 The smoke was investigated using the Ames test and the micronucleus assay.
3 It was weakly mutagenic to the bacteria, but in the bone marrow no increases in micronuclei were detected up to toxic levels of the smoke.
4 The method used here could be applied to other pyrotechnic mixtures which give rise to complex mixtures of products.
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