2017 ATSDR Substance Priority List

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2017 ATSDR Substance Priority List
2017 Rank Substance Name Total Points CAS RN
1 ARSENIC 1674 7440-38-2
2 LEAD 1531 7439-92-1
3 MERCURY 1458 7439-97-6
4 VINYL CHLORIDE 1358 75-01-4
5 POLYCHLORINATED BIPHENYLS 1345 1336-36-3
6 BENZENE 1329 71-43-2
7 CADMIUM 1320 7440-43-9
8 BENZO(A)PYRENE 1306 50-32-8
9 POLYCYCLIC AROMATIC HYDROCARBONS 1279 130498-29-2
10 BENZO(B)FLUORANTHENE 1251 205-99-2
11 CHLOROFORM 1203 67-66-3
12 AROCLOR 1260 1191 11096-82-5
13 DDT, P,P’- 1183 50-29-3
14 AROCLOR 1254 1172 11097-69-1
15 DIBENZO(A,H)ANTHRACENE 1156 53-70-3
16 TRICHLOROETHYLENE 1155 79-01-6
17 CHROMIUM, HEXAVALENT 1148 18540-29-9
18 DIELDRIN 1144 60-57-1
19 PHOSPHORUS, WHITE 1141 7723-14-0
20 HEXACHLOROBUTADIENE 1130 87-68-3
21 DDE, P,P’- 1127 72-55-9
22 CHLORDANE 1126 57-74-9
23 AROCLOR 1242 1126 53469-21-9
24 COAL TAR CREOSOTE 1124 8001-58-9
25 ALDRIN 1116 309-00-2
26 DDD, P,P’- 1114 72-54-8
27 AROCLOR 1248 1105 12672-29-6
28 HEPTACHLOR 1102 76-44-8
29 AROCLOR 1101 12767-79-2
30 BENZIDINE 1093 92-87-5
31 ACROLEIN 1090 107-02-8
32 TOXAPHENE 1089 8001-35-2
33 TETRACHLOROETHYLENE 1078 127-18-4
34 HEXACHLOROCYCLOHEXANE, GAMMA- 1076 58-89-9
35 CYANIDE 1071 57-12-5
36 HEXACHLOROCYCLOHEXANE, BETA- 1054 319-85-7
37 DISULFOTON 1049 298-04-4
38 BENZO(A)ANTHRACENE 1047 56-55-3
39 1,2-DIBROMOETHANE 1043 106-93-4
40 ENDRIN 1039 72-20-8
41 DIAZINON 1038 333-41-5
42 HEXACHLOROCYCLOHEXANE, DELTA- 1036 319-86-8
43 BERYLLIUM 1031 7440-41-7
44 ENDOSULFAN 1029 115-29-7
45 AROCLOR 1221 1028 11104-28-2
46 1,2-DIBROMO-3-CHLOROPROPANE 1027 96-12-8
47 HEPTACHLOR EPOXIDE 1022 1024-57-3
48 ENDOSULFAN, ALPHA 1019 959-98-8
49 CIS-CHLORDANE 1017 5103-71-9
50 CARBON TETRACHLORIDE 1014 56-23-5
51 COBALT 1013 7440-48-4
52 AROCLOR 1016 1012 12674-11-2
53 DDT, O,P’- 1009 789-02-6
54 PENTACHLOROPHENOL 1008 87-86-5
55 METHOXYCHLOR 1007 72-43-5
56 ENDOSULFAN SULFATE 1005 1031-07-8
57 NICKEL 996 7440-02-0
58 DI-N-BUTYL PHTHALATE 995 84-74-2
59 ENDRIN KETONE 993 53494-70-5
60 DIBROMOCHLOROPROPANE 984 67708-83-2
61 BENZO(K)FLUORANTHENE 970 207-08-9
62 TRANS-CHLORDANE 969 5103-74-2
63 ENDOSULFAN, BETA 968 33213-65-9
64 CHLORPYRIFOS 965 2921-88-2
65 XYLENES, TOTAL 964 1330-20-7
66 CHROMIUM(VI) TRIOXIDE 961 1333-82-0
67 AROCLOR 1232 959 11141-16-5
68 ENDRIN ALDEHYDE 959 7421-93-4
69 METHANE 952 74-82-8
70 3,3′-DICHLOROBENZIDINE 942 91-94-1
71 2-HEXANONE 941 591-78-6
72 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 941 1746-01-6
73 BENZOFLUORANTHENE 937 56832-73-6
74 TOLUENE 917 108-88-3
75 ZINC 915 7440-66-6
76 PENTACHLOROBENZENE 907 608-93-5
77 DI(2-ETHYLHEXYL)PHTHALATE 906 117-81-7
78 CHROMIUM 895 7440-47-3
79 AROCLOR 1240 889 71328-89-7
80 2,4,6-TRINITROTOLUENE 879 118-96-7
81 NAPHTHALENE 877 91-20-3
82 1,1-DICHLOROETHENE 876 75-35-4
83 BROMODICHLOROETHANE 868 683-53-4
84 DDD, O,P’- 867 53-19-0
85 2,4,6-TRICHLOROPHENOL 867 88-06-2
86 BIS(2-CHLOROETHYL) ETHER 867 111-44-4
87 HYDRAZINE 862 302-01-2
88 METHYLENE CHLORIDE 860 75-09-2
89 2,4-DINITROPHENOL 859 51-28-5
90 4,4′-METHYLENEBIS(2-CHLOROANILINE) 859 101-14-4
91 1,2-DICHLOROETHANE 852 107-06-2
92 THIOCYANATE 847 302-04-5
93 HEXACHLOROBENZENE 844 118-74-1
94 ASBESTOS 841 1332-21-4
95 RDX (Cyclonite) 833 121-82-4
96 RADIUM-226 833 13982-63-3
97 URANIUM 832 7440-61-1
98 2,4-DINITROTOLUENE 832 121-14-2
99 ETHION 831 563-12-2
100 4,6-DINITRO-O-CRESOL 828 534-52-1
101 RADIUM 827 7440-14-4
102 THORIUM 824 7440-29-1
103 DIMETHYLARSINIC ACID 822 75-60-5
104 CHLORINE 821 7782-50-5
105 1,3,5-TRINITROBENZENE 820 99-35-4
106 RADON 818 10043-92-2
107 HEXACHLOROCYCLOHEXANE, ALPHA- 817 319-84-6
108 RADIUM-228 815 15262-20-1
109 THORIUM-230 813 14269-63-7
110 URANIUM-235 812 15117-96-1
111 THORIUM-228 810 14274-82-9
112 RADON-222 810 14859-67-7
113 URANIUM-234 809 13966-29-5
114 N-NITROSODI-N-PROPYLAMINE 808 621-64-7
115 COAL TARS 808 8007-45-2
116 METHYLMERCURY 808 22967-92-6
117 1,1,1-TRICHLOROETHANE 807 71-55-6
118 COPPER 807 7440-50-8
119 CHRYSOTILE ASBESTOS 806 12001-29-5
120 PLUTONIUM-239 806 15117-48-3
121 POLONIUM-210 805 13981-52-7
122 PLUTONIUM-238 805 13981-16-3
123 LEAD-210 805 14255-04-0
124 AMOSITE ASBESTOS 804 12172-73-5
124 PLUTONIUM 804 7440-07-5
124 STRONTIUM-90 804 10098-97-2
127 RADON-220 804 22481-48-7
128 CHLOROBENZENE 804 108-90-7
129 AMERICIUM-241 804 86954-36-1
130 HYDROGEN CYANIDE 803 74-90-8
131 AZINPHOS-METHYL 803 86-50-0
132 ETHYLBENZENE 802 100-41-4
133 CHLORDECONE 802 143-50-0
134 BARIUM 802 7440-39-3
135 NEPTUNIUM-237 802 13994-20-2
136 PLUTONIUM-240 801 14119-33-6
137 1,2,3-Trichlorobenzene 801 87-61-6
138 FLUORANTHENE 800 206-44-0
139 S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE 799 78-48-8
140 MANGANESE 798 7439-96-5
141 CHRYSENE 792 218-01-9
142 2,4,5-TRICHLOROPHENOL 792 95-95-4
143 Perfluorooctane sulfonic acid 788 1763-23-1
144 POLYBROMINATED BIPHENYLS 785 67774-32-7
145 DICOFOL 785 115-32-2
146 SELENIUM 776 7782-49-2
147 1,1,2,2-TETRACHLOROETHANE 776 79-34-5
148 PARATHION 774 56-38-2
149 HEPTACHLORODIBENZO-P-DIOXIN 774 37871-00-4
150 HEXACHLOROCYCLOHEXANE, TECHNICAL GRADE 774 608-73-1
151 TRICHLOROFLUOROETHANE 773 27154-33-2
152 BROMINE 771 7726-95-6
153 AROCLOR 1268 765 11100-14-4
154 1,3-BUTADIENE 762 106-99-0
155 Perfluorooctanoic acid 758 335-67-1
156 HEPTACHLORODIBENZOFURAN 756 38998-75-3
157 TRIFLURALIN 755 1582-09-8
158 Perfluorohexanesulfonic acid 749 355-46-4
159 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 743 39001-02-0
160 AMMONIA 742 7664-41-7
161 2-METHYLNAPHTHALENE 727 91-57-6
162 2,3,4,7,8-PENTACHLORODIBENZOFURAN 724 57117-31-4
163 1,4-DICHLOROBENZENE 724 106-46-7
164 1,1-DICHLOROETHANE 721 75-34-3
165 NALED 721 300-76-5
166 1,1,2-TRICHLOROETHANE 720 79-00-5
167 HEXACHLOROCYCLOPENTADIENE 719 77-47-4
168 1,2-DIPHENYLHYDRAZINE 718 122-66-7
169 PHORATE 716 298-02-2
170 TRICHLOROETHANE 713 25323-89-1
171 ACENAPHTHENE 710 83-32-9
172 TETRACHLOROBIPHENYL 710 26914-33-0
173 PALLADIUM 706 7440-05-3
174 OXYCHLORDANE 705 27304-13-8
175 CRESOL, PARA- 704 106-44-5
176 INDENO(1,2,3-CD)PYRENE 702 193-39-5
177 GAMMA-CHLORDENE 702 56641-38-4
178 TETRACHLOROPHENOL 699 25167-83-3
179 1,2-DICHLOROBENZENE 697 95-50-1
180 1,2-DICHLOROETHENE, TRANS- 691 156-60-5
181 CHLOROETHANE 687 75-00-3
182 P-XYLENE 687 106-42-3
183 ALUMINUM 687 7429-90-5
184 PHENOL 686 108-95-2
185 CARBON MONOXIDE 684 630-08-0
186 CARBON DISULFIDE 682 75-15-0
187 2,4-DIMETHYLPHENOL 680 105-67-9
188 DIBENZOFURAN 676 132-64-9
189 ACETONE 672 67-64-1
190 HEXACHLOROETHANE 671 67-72-1
191 Butyl methyl phthalate 668 34006-76-3
192 CHLOROMETHANE 665 74-87-3
193 HEXACHLORODIBENZOFURAN 660 55684-94-1
194 BUTYL BENZYL PHTHALATE 658 85-68-7
195 HYDROGEN SULFIDE 658 7783-06-4
196 DICHLORVOS 656 62-73-7
197 DIBENZOFURANS, CHLORINATED 653 42934-53-2
198 CRESOL, ORTHO- 653 95-48-7
199 HEXACHLORODIBENZO-P-DIOXIN 652 34465-46-8
200 VANADIUM 650 7440-62-2
201 N-NITROSODIMETHYLAMINE 649 62-75-9
202 1,2,4-TRICHLOROBENZENE 647 120-82-1
203 Perfluorononanoic acid 647 375-95-1
204 ETHOPROP 644 13194-48-4
205 TETRACHLORODIBENZO-P-DIOXIN 641 41903-57-5
206 BROMOFORM 635 75-25-2
207 PENTACHLORODIBENZOFURAN 632 30402-15-4
208 1,3-DICHLOROBENZENE 628 541-73-1
209 PENTACHLORODIBENZO-P-DIOXIN 626 36088-22-9
210 N-NITROSODIPHENYLAMINE 625 86-30-6
211 2,4-DICHLOROPHENOL 619 120-83-2
212 2,3-DIMETHYLNAPHTHALENE 619 581-40-8
213 2,3,7,8-TETRACHLORODIBENZOFURAN 619 51207-31-9
214 1,4-DIOXANE 617 123-91-1
215 FLUORINE 613 7782-41-4
216 NITRITE 610 14797-65-0
217 CESIUM-137 610 10045-97-3
217 Chromic Acid 610 7738-94-5
219 2-BUTANONE 608 78-93-3
220 1,2-DICHLOROETHYLENE 608 540-59-0
221 POTASSIUM-40 608 13966-00-2
222 DINITROTOLUENE 607 25321-14-6
223 NITRATE 606 14797-55-8
224 FORMALDEHYDE 605 50-00-0
225 SILVER 605 7440-22-4
226 COAL TAR PITCH 605 65996-93-2
227 THORIUM-227 605 15623-47-9
228 ARSENIC ACID 604 7778-39-4
229 ARSENIC TRIOXIDE 604 1327-53-3
230 BENZOPYRENE 603 73467-76-2
231 CHLORDANE, TECHNICAL 602 12789-03-6
232 STROBANE 602 8001-50-1
233 4-AMINOBIPHENYL 602 92-67-1
233 PYRETHRUM 602 8003-34-7
235 ARSINE 602 7784-42-1
235 DIMETHOATE 602 60-51-5
237 BIS(CHLOROMETHYL) ETHER 602 542-88-1
237 CARBOPHENOTHION 602 786-19-6
239 ALPHA-CHLORDENE 601 56534-02-2
239 IODINE-131 601 10043-66-0
239 MERCURIC CHLORIDE 601 7487-94-7
239 SODIUM ARSENITE 601 7784-46-5
239 URANIUM-233 601 13968-55-3
244 ANTIMONY 601 7440-36-0
245 DIBROMOCHLOROMETHANE 601 124-48-1
246 CRESOLS 598 1319-77-3
247 DICHLOROBENZENE 596 25321-22-6
248 2,4-D 595 94-75-7
249 2-CHLOROPHENOL 591 95-57-8
250 BUTYLATE 591 2008-41-5
251 DIMETHYL FORMAMIDE 585 68-12-2
252 PHENANTHRENE 585 85-01-8
253 4-NITROPHENOL 580 100-02-7
254 DIURON 580 330-54-1
255 TETRACHLOROETHANE 577 25322-20-7
256 DICHLOROETHANE 568 1300-21-6
257 ETHYL ETHER 566 60-29-7
258 DIMETHYLANILINE 563 121-69-7
259 1,3-DICHLOROPROPENE, CIS- 561 10061-01-5
260 PYRENE 561 129-00-0
261 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 559 35822-46-9
262 PHOSPHINE 557 7803-51-2
263 TRICHLOROBENZENE 556 12002-48-1
264 2,6-DINITROTOLUENE 555 606-20-2
265 FLUORIDE ION 550 16984-48-8
266 PENTAERYTHRITOL TETRANITRATE 549 78-11-5
267 1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 549 67562-39-4
268 1,3-DICHLOROPROPENE, TRANS- 548 10061-02-6
269 ACRYLONITRILE 544 107-13-1
270 BIS(2-ETHYLHEXYL)ADIPATE 543 103-23-1
271 CARBAZOLE 541 86-74-8
272 2-CHLOROANILINE 539 95-51-2
273 METOLACHLOR 539 51218-45-2
274 1,2-DICHLOROETHENE, CIS- 539 156-59-2
275 1,2,3-TRICHLOROPROPANE 537 96-18-4

Substances were assigned the same rank when two (or more) substances received equivalent total point scores.

CAS RN = Chemical Abstracts Service Registry Number

www.atsdr.cdc.gov/SPL

Page last reviewed: April 14, 2020
Content source: Agency for Toxic Substances and Disease Registry