https://www.shipnerd.com/support/freight-class/shipping-codes/chemical/inorganic-compound-precious-metal-rare-earth-radioactive-isotope/inorganic-organic-compounds-mercury-chemically-excluding-amalgams-062852
Inorganic or organic compounds of mercury, whether or not chemically defined, excluding amalgams. –...
compounds of mercurychemically definedinorganicwhetherexcluding