This Canadian federal regulation sets toxicological requirements for toys supplied for children. Section 23 sets numeric limits for accessible stickers, films, similar removable materials, and surface coating materials: total lead, total mercury, and a compound-migration provision for antimony, arsenic, cadmium, selenium, and barium compounds. The lead and mercury values are routeable to the structured register as metal concentrations. The compound-migration provision is documented on the regulation page and gap log because the source states compound mass, not elemental metal mass.
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