… peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or …
Explanatory notes
… peroxides , ketone peroxides (whether or not chemically defined), and their halogenated, sulphonated, nitrated or … as well as ketone peroxides (whether or not chemically defined), e.g., cyclohexanone peroxide …