CFR › Title 40 › Part 713 › §713.540 CFR §713.5Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Elemental mercury (Chemical Abstracts Service Registry Number 7439-97-6); or(b)A mercury compound, including but not limited to the mercury compounds listed in Table 1 of this part by Chemical Abstracts Service Registry Number: