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2011 ATSDR Substance Priority List

2011 RANK SUBSTANCE NAME TOTAL POINTS 2007 RANK CAS RN
1 ARSENIC 1665.5 1 007440-38-2
2 LEAD 1529.1 2 007439-92-1
3 MERCURY 1460.9 3 007439-97-6
4 VINYL CHLORIDE 1361.1 4 000075-01-4
5 POLYCHLORINATED BIPHENYLS 1344.1 5 001336-36-3
6 BENZENE 1332.0 6 000071-43-2
7 CADMIUM 1318.7 7 007440-43-9
8 BENZO(A)PYRENE 1305.7 9 000050-32-8
9 POLYCYCLIC AROMATIC HYDROCARBONS 1282.3 8 130498-29-2
10 BENZO(B)FLUORANTHENE 1252.4 10 000205-99-2
11 CHLOROFORM 1207.5 11 000067-66-3
12 AROCLOR 1260 1190.0 14 011096-82-5
13 DDT, P,P'- 1183.0 12 000050-29-3
14 AROCLOR 1254 1171.7 13 011097-69-1
15 DIBENZO(A,H)ANTHRACENE 1155.2 15 000053-70-3
16 TRICHLOROETHYLENE 1151.1 16 000079-01-6
17 CHROMIUM, HEXAVALENT 1146.6 18 018540-29-9
18 DIELDRIN 1143.1 17 000060-57-1
19 PHOSPHORUS, WHITE 1141.9 19 007723-14-0
20 HEXACHLOROBUTADIENE 1128.5 22 000087-68-3
21 DDE, P,P'- 1127.2 21 000072-55-9
22 CHLORDANE 1126.4 20 000057-74-9
23 COAL TAR CREOSOTE 1124.8 23 008001-58-9
24 AROCLOR 1242 1123.8 29 053469-21-9
25 ALDRIN 1115.8 24 000309-00-2
26 DDD, P,P'- 1114.2 25 000072-54-8
27 AROCLOR 1248 1103.9 27 012672-29-6
28 HEPTACHLOR 1101.1 34 000076-44-8
29 AROCLOR 1099.4 30 012767-79-2
30 BENZIDINE 1090.6 26 000092-87-5
31 ACROLEIN 1088.5 37 000107-02-8
32 TOXAPHENE 1087.7 31 008001-35-2
33 TETRACHLOROETHYLENE 1077.4 33 000127-18-4
34 HEXACHLOROCYCLOHEXANE, GAMMA- 1074.7 32 000058-89-9
35 CYANIDE 1071.9 28 000057-12-5
36 HEXACHLOROCYCLOHEXANE, BETA- 1053.5 36 000319-85-7
37 BENZO(A)ANTHRACENE 1047.6 39 000056-55-3
38 DISULFOTON 1047.2 38 000298-04-4
39 1,2-DIBROMOETHANE 1041.9 35 000106-93-4
40 ENDRIN 1038.3 41 000072-20-8
41 DIAZINON 1036.7 56 000333-41-5
42 HEXACHLOROCYCLOHEXANE, DELTA- 1034.8 43 000319-86-8
43 BERYLLIUM 1032.7 42 007440-41-7
44 ENDOSULFAN 1028.0 54 000115-29-7
45 AROCLOR 1221 1027.1 48 011104-28-2
46 1,2-DIBROMO-3-CHLOROPROPANE 1025.8 44 000096-12-8
47 HEPTACHLOR EPOXIDE 1021.4 46 001024-57-3
48 ENDOSULFAN, ALPHA 1018.4 57 000959-98-8
49 CIS-CHLORDANE 1016.1 59 005103-71-9
50 CARBON TETRACHLORIDE 1015.5 47 000056-23-5
51 AROCLOR 1016 1011.9 51 012674-11-2
52 COBALT 1010.9 49 007440-48-4
53 PENTACHLOROPHENOL 1009.0 45 000087-86-5
54 DDT, O,P'- 1007.9 50 000789-02-6
55 METHOXYCHLOR 1006.3 61 000072-43-5
56 ENDOSULFAN SULFATE 1003.9 55 001031-07-8
57 NICKEL 998.7 53 007440-02-0
58 DI-N-BUTYL PHTHALATE 997.3 52 000084-74-2
59 ENDRIN KETONE 992.0 63 053494-70-5
60 DIBROMOCHLOROPROPANE 983.0 60 067708-83-2
61 BENZO(K)FLUORANTHENE 972.2 62 000207-08-9
62 XYLENES, TOTAL 969.2 58 001330-20-7
63 TRANS-CHLORDANE 968.3 64 005103-74-2
64 ENDOSULFAN, BETA 967.6 67 033213-65-9
65 CHLORPYRIFOS 963.9 127 002921-88-2
66 CHROMIUM(VI) TRIOXIDE 960.0 65 001333-82-0
67 AROCLOR 1232 958.2 68 011141-16-5
68 ENDRIN ALDEHYDE 957.7 69 007421-93-4
69 METHANE 953.4 66 000074-82-8
70 2-HEXANONE 941.4 72 000591-78-6
71 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 940.9 73 001746-01-6
72 3,3'-DICHLOROBENZIDINE 940.6 40 000091-94-1
73 BENZOFLUORANTHENE 935.7 70 056832-73-6
74 TOLUENE 924.1 71 000108-88-3
75 ZINC 919.1 74 007440-66-6
76 DI(2-ETHYLHEXYL)PHTHALATE 908.0 76 000117-81-7
77 PENTACHLOROBENZENE 906.8 155 000608-93-5
78 CHROMIUM 897.5 77 007440-47-3
79 AROCLOR 1240 888.3 81 071328-89-7
80 NAPHTHALENE 881.4 78 000091-20-3
81 1,1-DICHLOROETHENE 879.5 79 000075-35-4
82 2,4,6-TRINITROTOLUENE 877.5 82 000118-96-7
83 2,4,6-TRICHLOROPHENOL 866.4 86 000088-06-2
84 BIS(2-CHLOROETHYL) ETHER 866.3 88 000111-44-4
85 BROMODICHLOROETHANE 866.2 83 000683-53-4
86 METHYLENE CHLORIDE 865.6 80 000075-09-2
87 DDD, O,P'- 865.6 151 000053-19-0
88 HYDRAZINE 860.8 84 000302-01-2
89 2,4-DINITROPHENOL 858.4 87 000051-28-5
90 4,4'-METHYLENEBIS(2-CHLOROANILINE) 857.2 152 000101-14-4
91 1,2-DICHLOROETHANE 853.6 85 000107-06-2
92 THIOCYANATE 845.8 89 000302-04-5
93 HEXACHLOROBENZENE 844.3 93 000118-74-1
94 ASBESTOS 841.4 90 001332-21-4
95 RADIUM-226 833.3 95 013982-63-3
96 RDX (CYCLOTRIMETHYLENETRINITRAMINE) 831.8 92 000121-82-4
97 URANIUM 831.8 98 007440-61-1
98 2,4-DINITROTOLUENE 831.2 94 000121-14-2
99 ETHION 829.9 96 000563-12-2
100 RADIUM 827.7 100 007440-14-4
101 4,6-DINITRO-O-CRESOL 827.3 102 000534-52-1
102 THORIUM 823.4 101 007440-29-1
103 DIMETHYLARSINIC ACID 821.2 75 000075-60-5
104 CHLORINE 820.6 91 007782-50-5
105 RADON 818.6 105 010043-92-2
106 1,3,5-TRINITROBENZENE 818.6 103 000099-35-4
107 HEXACHLOROCYCLOHEXANE, ALPHA- 817.3 115 000319-84-6
108 RADIUM-228 815.3 106 015262-20-1
109 THORIUM-230 813.7 107 014269-63-7
110 1,1,1-TRICHLOROETHANE 812.4 97 000071-55-6
111 URANIUM-235 812.1 107 015117-96-1
112 URANIUM-234 809.6 111 013966-29-5
113 THORIUM-228 809.5 113 014274-82-9
114 RADON-222 809.3 114 014859-67-7
115 COAL TARS 808.2 118 008007-45-2
116 ETHYLBENZENE 807.7 99 000100-41-4
117 CHLOROBENZENE 807.0 104 000108-90-7
118 N-NITROSODI-N-PROPYLAMINE 806.9 112 000621-64-7
119 CHRYSOTILE ASBESTOS 806.2 119 012001-29-5
120 METHYLMERCURY 806.0 123 022967-92-6
120 PLUTONIUM-239 806.0 121 015117-48-3
122 POLONIUM-210 805.6 122 013981-52-7
123 PLUTONIUM-238 805.2 124 013981-16-3
124 LEAD-210 805.1 125 014255-04-0
125 COPPER 804.7 128 007440-50-8
126 BARIUM 804.7 109 007440-39-3
127 AMOSITE ASBESTOS 804.3 131 012172-73-5
127 PLUTONIUM 804.3 126 007440-07-5
127 STRONTIUM-90 804.3 119 010098-97-2
130 RADON-220 804.2 130 022481-48-7
131 AMERICIUM-241 803.8 129 086954-36-1
132 TRIBUTYLTIN 802.9 134 000688-73-3
133 FLUORANTHENE 802.6 110 000206-44-0
134 AZINPHOS-METHYL 802.6 135 000086-50-0
135 CHLORDECONE 802.1 138 000143-50-0
136 NEPTUNIUM-237 801.9 136 013994-20-2
137 HYDROGEN CYANIDE 801.5 133 000074-90-8
138 PLUTONIUM-240 801.4 138 014119-33-6
139 1,2,3-TRICHLOROBENZENE 800.3 116 000087-61-6
140 MANGANESE 799.4 117 007439-96-5
141 S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE 797.6 141 000078-48-8
142 CHRYSENE 793.4 137 000218-01-9
143 2,4,5-TRICHLOROPHENOL 790.4 222 000095-95-4
144 POLYBROMINATED BIPHENYLS 784.3 143 067774-32-7
145 DICOFOL 783.8 144 000115-32-2
146 SELENIUM 778.3 147 007782-49-2
147 1,1,2,2-TETRACHLOROETHANE 777.5 146 000079-34-5
148 HEPTACHLORODIBENZO-P-DIOXIN 773.8 154 037871-00-4
149 PARATHION 773.5 145 000056-38-2
150 HEXACHLOROCYCLOHEXANE, TECHNICAL GRADE 773.2 148 000608-73-1
151 TRICHLOROFLUOROETHANE 772.4 149 027154-33-2
152 BROMINE 770.1 142 007726-95-6
153 HEPTACHLORODIBENZOFURAN 755.5 166 038998-75-3
154 TRIFLURALIN 754.3 150 001582-09-8
155 1,3-BUTADIENE 750.4 156 000106-99-0
156 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 742.9 162 039001-02-0
157 AMMONIA 741.8 157 007664-41-7
158 2-METHYLNAPHTHALENE 728.9 158 000091-57-6
159 1,4-DICHLOROBENZENE 725.5 159 000106-46-7
160 1,1-DICHLOROETHANE 725.0 160 000075-34-3
161 2,3,4,7,8-PENTACHLORODIBENZOFURAN 723.6 168 057117-31-4
162 NALED 720.6 235 000300-76-5
163 HEXACHLOROCYCLOPENTADIENE 718.1 165 000077-47-4
164 1,2-DIPHENYLHYDRAZINE 717.9 167 000122-66-7
165 1,1,2-TRICHLOROETHANE 717.0 163 000079-00-5
166 PHORATE 715.2 225 000298-02-2
167 TRICHLOROETHANE 713.8 164 025323-89-1
168 ACENAPHTHENE 711.8 161 000083-32-9
169 TETRACHLOROBIPHENYL 709.2 169 026914-33-0
170 OXYCHLORDANE 705.5 171 027304-13-8
171 PALLADIUM 705.4 180 007440-05-3
172 CRESOL, PARA- 704.8 170 000106-44-5
173 INDENO(1,2,3-CD)PYRENE 702.6 174 000193-39-5
174 GAMMA-CHLORDENE 701.9 175 056641-38-4
175 1,2-DICHLOROBENZENE 698.0 172 000095-50-1
176 TETRACHLOROPHENOL 697.0 177 025167-83-3
177 1,2-DICHLOROETHENE, TRANS- 695.5 173 000156-60-5
178 CHLOROETHANE 688.9 183 000075-00-3
179 PHENOL 688.4 182 000108-95-2
180 P-XYLENE 686.6 185 000106-42-3
181 ALUMINUM 684.7 187 007429-90-5
182 CARBON DISULFIDE 683.0 176 000075-15-0
183 CARBON MONOXIDE 682.2 189 000630-08-0
184 2,4-DIMETHYLPHENOL 680.5 188 000105-67-9
185 DIBENZOFURAN 677.3 186 000132-64-9
186 ACETONE 676.5 184 000067-64-1
187 HEXACHLOROETHANE 669.4 197 000067-72-1
188 BUTYL METHYL PHTHALATE 667.4 194 034006-76-3
189 CHLOROMETHANE 666.3 193 000074-87-3
190 HEXACHLORODIBENZOFURAN 660.1 181 055684-94-1
191 BUTYL BENZYL PHTHALATE 659.1 195 000085-68-7
192 HYDROGEN SULFIDE 656.3 191 007783-06-4
193 DICHLORVOS 655.5 240 000062-73-7
194 CRESOL, ORTHO- 653.4 196 000095-48-7
195 DIBENZOFURANS, CHLORINATED 653.0 236 042934-53-2
196 HEXACHLORODIBENZO-P-DIOXIN 651.7 153 034465-46-8
197 VANADIUM 649.9 198 007440-62-2
198 N-NITROSODIMETHYLAMINE 648.3 199 000062-75-9
199 1,2,4-TRICHLOROBENZENE 647.4 200 000120-82-1
200 ETHOPROP 643.7 236 013194-48-4
201 TETRACHLORODIBENZO-P-DIOXIN 641.5 202 041903-57-5
202 BROMOFORM 635.1 201 000075-25-2
203 PENTACHLORODIBENZOFURAN 631.7 192 030402-15-4
204 1,3-DICHLOROBENZENE 628.6 203 000541-73-1
205 PENTACHLORODIBENZO-P-DIOXIN 625.9 204 036088-22-9
206 N-NITROSODIPHENYLAMINE 625.8 205 000086-30-6
207 2,3,7,8-TETRACHLORODIBENZOFURAN 618.9 207 051207-31-9
208 2,4-DICHLOROPHENOL 618.5 209 000120-83-2
209 2,3-DIMETHYLNAPHTHALENE 617.5 New 000581-40-8
210 1,4-DIOXANE 613.5 210 000123-91-1
211 FLUORINE 613.3 211 007782-41-4
212 2-BUTANONE 611.1 208 000078-93-3
213 1,2-DICHLOROETHYLENE 610.4 206 000540-59-0
214 CESIUM-137 610.0 213 010045-97-3
214 CHROMIC ACID 610.0 215 007738-94-5
216 NITRITE 609.0 212 014797-65-0
217 SILVER 608.1 214 007440-22-4
218 POTASSIUM-40 607.6 217 013966-00-2
219 DINITROTOLUENE 607.3 218 025321-14-6
220 NITRATE 606.0 216 014797-55-8
221 COAL TAR PITCH 605.2 220 065996-93-2
222 THORIUM-227 605.0 221 015623-47-9
223 ARSENIC ACID 604.3 223 007778-39-4
224 ARSENIC TRIOXIDE 603.8 224 001327-53-3
225 BENZOPYRENE 602.9 226 073467-76-2
226 CHLORDANE, TECHNICAL 602.5 228 012789-03-6
227 STROBANE 602.5 230 008001-50-1
228 4-AMINOBIPHENYL 602.4 232 000092-67-1
228 PYRETHRUM 602.4 232 008003-34-7
230 ARSINE 602.4 234 007784-42-1
230 DIMETHOATE 602.4 229 000060-51-5
232 ANTIMONY 602.2 219 007440-36-0
233 CARBOPHENOTHION 601.9 238 000786-19-6
234 ALPHA-CHLORDENE 601.4 238 056534-02-2
234 IODINE-131 601.4 132 010043-66-0
234 MERCURIC CHLORIDE 601.4 241 007487-94-7
234 SODIUM ARSENITE 601.4 241 007784-46-5
234 URANIUM-233 601.4 178 013968-55-3
239 DIBROMOCHLOROMETHANE 600.5 249 000124-48-1
240 CRESOLS 597.1 227 001319-77-3
241 FORMALDEHYDE 596.0 244 000050-00-0
242 DICHLOROBENZENE 595.4 254 025321-22-6
243 2,4-D ACID 594.5 248 000094-75-7
244 2-CHLOROPHENOL 591.1 245 000095-57-8
245 BUTYLATE 589.9 251 002008-41-5
246 PHENANTHRENE 588.3 246 000085-01-8
247 DIMETHYL FORMAMIDE 585.3 252 000068-12-2
248 4-NITROPHENOL 580.0 257 000100-02-7
249 DIURON 578.7 250 000330-54-1
250 TETRACHLOROETHANE 576.7 190 025322-20-7
251 DICHLOROETHANE 567.8 256 001300-21-6
252 ETHYL ETHER 565.2 255 000060-29-7
253 PYRENE 564.1 253 000129-00-0
254 DIMETHYLANILINE 561.8 New 000121-69-7
255 1,3-DICHLOROPROPENE, CIS- 561.0 258 010061-01-5
256 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 558.9 263 035822-46-9
257 PHOSPHINE 555.2 259 007803-51-2
258 TRICHLOROBENZENE 555.1 260 012002-48-1
259 2,6-DINITROTOLUENE 554.4 261 000606-20-2
260 FLUORIDE ION 549.9 262 016984-48-8
261 1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 548.8 273 067562-39-4
262 PENTAERYTHRITOL TETRANITRATE 548.2 265 000078-11-5
263 1,3-DICHLOROPROPENE, TRANS- 548.0 266 010061-02-6
264 ACRYLONITRILE 543.2 274 000107-13-1
265 BIS(2-ETHYLHEXYL)ADIPATE 542.4 267 000103-23-1
266 CARBAZOLE 538.6 268 000086-74-8
267 METOLACHLOR 538.2 New 051218-45-2
268 2-CHLOROANILINE 537.9 New 000095-51-2
269 1,2,3-TRICHLOROPROPANE 536.1 New 000096-18-4
270 CARBARYL 535.5 272 000063-25-2
271 1,2-DICHLOROETHENE, CIS- 533.8 270 000156-59-2
272 METHYL ISOBUTYL KETONE 529.6 269 000108-10-1
273 STYRENE 529.4 271 000100-42-5
274 THALLIUM 525.3 New 007440-28-0
275 1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 524.3 New 072918-21-9

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