. 2015 Aug 20;23(6):578–595. doi: 10.1089/ars.2015.6289

Table 2.

The Agency for Toxic Substances and Disease Registry's 2013 Top 20 Priority Toxins^a

Rank	Compound	CASRN
1	Arsenic	007440-38-2
2	Lead	007439-92-1
3	Mercury	007439-97-6
4	Vinyl chloride	000075-01-4
5	Polycholrinated biphenols	001336-36-3
6	Benzene	000071-43-2
7	Cadmium	007440-43-9
8	Benzo(a)pyrene	000050-32-8
9	Polycyclic aromatic hydrocarbons	130498-29-2
10	Benzo(b)fluoranthene	000205-99-2
11	Chloroform	000067-66-3
12	Aroclor 1260	011096-82-5
13	DDT and P,P′-DDT	000050-29-3
14	Aroclor 1254	011097-69-1
15	Dibenzo(a,h)anthracene	000053-70-3
16	Trichloroethylene	000079-01-6
17	Chromoium, hexavalent	018540-29-9
18	Dieldrin	000060-57-1
19	Phosphorus, white	007723-14-0
20	Hexachlorobutadiene	000087-68-3

^{^a}