(a) Elemental mercury (Chemical Abstracts Service Registry Number 7439-97-6); or

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(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:

Table 1—Mercury Compounds

Chemical Abstracts
Service Registry No.
Mercury compound
10045-94-0Nitric acid, mercury(2+) salt (2:1).
100-57-2Mercury, hydroxyphenyl-.
10112-91-1Mercury chloride (Hg2Cl2).
10124-48-8Mercury amide chloride (Hg(NH2)Cl).
103-27-5Mercury, phenyl(propanoato-.kappa.O)-.
10415-75-5Nitric acid, mercury(1+) salt (1:1).
104-60-9Mercury, (9-octadecenoato-.kappa.O)phenyl-.
1191-80-69-Octadecenoic acid (9Z)-, mercury(2+) salt (2:1).
12068-90-5Mercury telluride (HgTe).
13170-76-8Hexanoic acid, 2-ethyl-, mercury(2+) salt (2:1).
13302-00-6Mercury, (2-ethylhexanoato-.kappa.O)phenyl-.
1335-31-5Mercury cyanide oxide (Hg2(CN)2O).
1344-48-5Mercury sulfide (HgS).
1345-09-1Cadmium mercury sulfide.
13876-85-2Mercurate(2-), tetraiodo-, copper(1+) (1:2), (T-4)-.
138-85-2Mercurate(1-), (4-carboxylatophenyl)hydroxy-, sodium (1:1).
141-51-5Mercury, iodo(iodomethyl)-.
14783-59-6Mercury, bis[(2-phenyldiazenecarbothioic acid-.kappa.S) 2-phenylhydrazidato-.kappa.N2]-, (T-4)-.
15385-58-7Mercury, dibromodi-, (Hg-Hg).
15785-93-0Mercury, chloro[4-[(2,4-dinitrophenyl)amino]phenyl]-.
15829-53-5Mercury oxide (Hg2O).
1600-27-7Acetic acid, mercury(2+) salt (2:1).
1785-43-9Mercury, chloro(ethanethiolato)-.
19447-62-2Mercury, (acetato-.kappa.O)[4-[2-[4-(dimethylamino)phenyl]diazenyl]phenyl]-.
20582-71-2Mercurate(2-), tetrachloro-, potassium (1:2), (T-4)-.
20601-83-6Mercury selenide (HgSe).
21908-53-2Mercury oxide (HgO).
22450-90-4Mercury(1+), amminephenyl-, acetate (1:1).
24579-90-6Mercury, chloro(2-hydroxy-5-nitrophenyl)-.
24806-32-4Mercury, [.mu.-[2-dodecylbutanedioato(2-).kappa.O1:.kappa.O4]]diphenyldi-.
26545-49-3Mercury, (neodecanoato-.kappa.O)phenyl-.
27685-51-4Cobaltate(2-), tetrakis(thiocyanato-.kappa.N)-, mercury(2+) (1:1), (T-4)-.
29870-72-2Cadmium mercury telluride ((Cd,Hg)Te).
3294-57-3Mercury, phenyl(trichloromethyl)-.
33770-60-4Mercury, [3,6-dichloro-4,5-di(hydroxy-.kappa.O)-3,5cyclohexadiene-1,2-dionato(2-)]-.
3570-80-7Mercury, bis(acetato-.kappa.O)[.mu.-(3′,6′-dihydroxy-3oxospiro[isobenzofuran-1(3H),9′-[9H]xanthene]-2′,7’diyl)]di-.
537-64-4Mercury, bis(4-methylphenyl)-.
539-43-5Mercury, chloro(4-methylphenyl)-.
54-64-8Mercurate(1-), ethyl[2-(mercapto-.kappa.S)benzoato(2-).kappa.O]-, sodium (1:1).
55-68-5Mercury, (nitrato-.kappa.O)phenyl-.
56724-82-4Mercury, phenyl[(2-phenyldiazenecarbothioic acid.kappa.S) 2-phenylhydrazidato-.kappa.N2]-.
587-85-9Mercury, diphenyl-.
592-04-1Mercury cyanide (Hg(CN)2).
592-85-8Thiocyanic acid, mercury(2+) salt (2:1).
593-74-8Mercury, dimethyl-.
59-85-8Mercurate(1-), (4-carboxylatophenyl)chloro-, hydrogen.
623-07-4Mercury, chloro(4-hydroxyphenyl)-.
62-38-4Mercury, (acetato-.kappa.O)phenyl-.
62638-02-2Cyclohexanebutanoic acid, mercury(2+) salt (2:1).
627-44-1Mercury, diethyl-.
6283-24-5Mercury, (acetato-.kappa.O)(4-aminophenyl)-.
628-86-4Mercury, bis(fulminato-.kappa.C)-.
629-35-6Mercury, dibutyl-.
63325-16-6Mercurate(2-), tetraiodo-, (T-4)-, hydrogen, compd. with 5-iodo-2-pyridinamine (1:2:2).
63468-53-1Mercury, (acetato-.kappa.O)(2-hydroxy-5-nitrophenyl)-.
63549-47-3Mercury, bis(acetato-.kappa.O)(benzenamine)-.
68201-97-8Mercury, (acetato-.kappa.O)diamminephenyl-, (T-4)-.
72379-35-2Mercurate(1-), triiodo-, hydrogen, compd. with 3-methyl2(3H)-benzothiazolimine (1:1:1).
7439-97-6Mercury.
7487-94-7Mercury chloride (HgCl2).
7546-30-7Mercury chloride (HgCl).
7616-83-3Perchloric acid, mercury(2+) salt (2:1).
7774-29-0Mercury iodide (HgI2).
7783-33-7Mercurate(2-), tetraiodo-, potassium (1:2), (T-4)-.
7783-35-9Sulfuric acid, mercury(2+) salt (1:1).
7783-39-3Mercury fluoride (HgF2).
7789-47-1Mercury bromide (HgBr2).
90-03-9Mercury, chloro(2-hydroxyphenyl)-.
94070-93-6Mercury, [.mu.-[(oxydi-2,1-ethanediyl 1,2benzenedicarboxylato-.kappa.O2)(2-)]]diphenyldi-.