Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content

2001 ATSDR Substance Priority List

2001 RANK SUBSTANCE NAME TOTAL POINTS 1999 RANK CAS RN
1 ARSENIC 1653.61 1 007440-38-2
2 LEAD 1528.01 2 007439-92-1
3 MERCURY 1503.32 3 007439-97-6
4 VINYL CHLORIDE 1388.65 4 000075-01-4
5 POLYCHLORINATED BIPHENYLS 1364.35 6 001336-36-3
6 BENZENE 1356.41 5 000071-43-2
7 CADMIUM 1319.78 7 007440-43-9
8 BENZO(A)PYRENE 1303.14 8 000050-32-8
9 POLYCYCLIC AROMATIC HYDROCARBONS 1300.73 9 130498-29-2
10 BENZO(B)FLUORANTHENE 1271.94 10 000205-99-2
11 CHLOROFORM 1234.42 11 000067-66-3
12 DDT, P,P'- 1190.24 12 000050-29-3
13 AROCLOR 1254 1178.24 14 011097-69-1
14 AROCLOR 1260 1175.08 13 011096-82-5
15 TRICHLOROETHYLENE 1160.49 15 000079-01-6
16 DIBENZO(A,H)ANTHRACENE 1159.41 17 000053-70-3
17 DIELDRIN 1148.51 18 000060-57-1
18 CHROMIUM, HEXAVALENT 1147.80 16 018540-29-9
19 CHLORDANE 1131.11 22 000057-74-9
20 HEXACHLOROBUTADIENE 1130.07 19 000087-68-3
21 DDE, P,P'- 1129.31 20 000072-55-9
22 COAL TAR CREOSOTE 1124.54 21 008001-58-9
23 ALDRIN 1120.21 24 000309-00-2
24 PHOSPHORUS, WHITE 1116.30 29 007723-14-0
25 BENZIDINE 1114.32 23 000092-87-5
26 DDD, P,P'- 1113.74 27 000072-54-8
27 AROCLOR 1248 1106.62 25 012672-29-6
28 CYANIDE 1099.94 26 000057-12-5
29 AROCLOR 1242 1092.58 28 053469-21-9
30 HEPTACHLOR 1085.76 30 000076-44-8
31 TOXAPHENE 1082.49 32 008001-35-2
32 TETRACHLOROETHYLENE 1081.45 31 000127-18-4
33 HEXACHLOROCYCLOHEXANE, GAMMA- 1081.27 33 000058-89-9
34 BENZO(A)ANTHRACENE 1062.54 35 000056-55-3
35 HEXACHLOROCYCLOHEXANE, BETA- 1061.60 34 000319-85-7
36 1,2-DIBROMOETHANE 1058.09 36 000106-93-4
37 DISULFOTON 1053.72 37 000298-04-4
38 BERYLLIUM 1044.18 39 007440-41-7
39 HEXACHLOROCYCLOHEXANE, DELTA- 1039.19 40 000319-86-8
40 ENDRIN 1038.83 38 000072-20-8
41 1,2-DIBROMO-3-CHLOROPROPANE 1032.99 43 000096-12-8
42 HEPTACHLOR EPOXIDE 1026.85 47 001024-57-3
43 PENTACHLOROPHENOL 1024.18 44 000087-86-5
44 CARBON TETRACHLORIDE 1020.59 46 000056-23-5
45 ENDOSULFAN, ALPHA 1016.38 55 000959-98-8
46 AROCLOR 1221 1015.56 41 011104-28-2
47 DI-N-BUTYL PHTHALATE 1015.43 42 000084-74-2
48 AROCLOR 1016 1014.94 45 012674-11-2
49 COBALT 1012.27 49 007440-48-4
50 DDT, O,P'- 1011.55 51 000789-02-6
51 CIS-CHLORDANE 1011.29 60 005103-71-9
52 ENDOSULFAN SULFATE 1006.01 50 001031-07-8
53 NICKEL 1005.34 52 007440-02-0
54 ENDOSULFAN 1004.00 56 000115-29-7
55 3,3'-DICHLOROBENZIDINE 1003.98 53 000091-94-1
56 XYLENES, TOTAL 1003.91 48 001330-20-7
57 TRANS-CHLORDANE 999.67 66 005103-74-2
58 METHOXYCHLOR 998.82 76 000072-43-5
59 DIBROMOCHLOROPROPANE 993.50 54 067708-83-2
60 BENZO(K)FLUORANTHENE 985.64 57 000207-08-9
61 AROCLOR 984.93 58 012767-79-2
62 ENDRIN KETONE 980.70 59 053494-70-5
63 ENDOSULFAN, BETA 975.42 64 033213-65-9
64 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 964.52 67 001746-01-6
65 CHROMIUM(VI) OXIDE 964.00 163 001333-82-0
66 METHANE 961.42 65 000074-82-8
67 AROCLOR 1232 956.41 63 011141-16-5
68 TOLUENE 954.93 62 000108-88-3
69 ENDRIN ALDEHYDE 954.04 69 007421-93-4
70 BENZOFLUORANTHENE 947.43 68 056832-73-6
71 2-HEXANONE 944.69 61 000591-78-6
72 ACROLEIN 938.18 211 000107-02-8
73 ZINC 932.44 70 007440-66-6
74 DIMETHYLARSINIC ACID 929.43 71 000075-60-5
75 DI(2-ETHYLHEXYL)PHTHALATE 921.55 72 000117-81-7
76 CHROMIUM 911.63 73 007440-47-3
77 NAPHTHALENE 899.35 75 000091-20-3
78 METHYLENE CHLORIDE 891.98 74 000075-09-2
79 1,1-DICHLOROETHENE 887.05 77 000075-35-4
80 AROCLOR 1240 886.38 78 071328-89-7
81 2,4,6-TRINITROTOLUENE 870.31 82 000118-96-7
82 1,2-DICHLOROETHANE 867.95 80 000107-06-2
83 2,4-DINITROPHENOL 865.19 81 000051-28-5
84 BROMODICHLOROETHANE 864.22 225 000683-53-4
85 BIS(2-CHLOROETHYL) ETHER 862.39 79 000111-44-4
86 HYDRAZINE 858.99 220 000302-01-2
87 2,4,6-TRICHLOROPHENOL 854.60 83 000088-06-2
88 THIOCYANATE 844.50 89 000302-04-5
89 ASBESTOS 843.64 90 001332-21-4
90 1,1,1-TRICHLOROETHANE 842.06 86 000071-55-6
91 ETHYLBENZENE 841.37 87 000100-41-4
92 CYCLOTRIMETHYLENETRINITRAMINE (RDX) 837.73 85 000121-82-4
93 4,6-DINITRO-O-CRESOL 836.37 91 000534-52-1
94 URANIUM 835.16 92 007440-61-1
95 RADIUM-226 833.49 94 013982-63-3
96 CHLORINE 831.39 84 007782-50-5
97 ETHION 830.34 96 000563-12-2
98 RADIUM 829.29 93 007440-14-4
99 THORIUM 825.64 97 007440-29-1
100 HEXACHLOROBENZENE 825.21 95 000118-74-1
101 2,4-DINITROTOLUENE 824.99 100 000121-14-2
102 BARIUM 819.77 99 007440-39-3
103 1,1,2,2-TETRACHLOROETHANE 817.79 88 000079-34-5
104 RADON 817.53 102 010043-92-2
105 CHLOROBENZENE 816.86 98 000108-90-7
106 FLUORANTHENE 816.71 101 000206-44-0
107 RADIUM-228 815.52 103 015262-20-1
108 THORIUM-230 815.18 104 014269-63-7
109 URANIUM-235 814.18 108 015117-96-1
110 HEXACHLOROCYCLOHEXANE, ALPHA- 813.67 114 000319-84-6
111 1,3,5-TRINITROBENZENE 813.67 107 000099-35-4
112 N-NITROSODI-N-PROPYLAMINE 813.52 112 000621-64-7
113 URANIUM-234 812.94 110 013966-29-5
114 DIAZINON 812.27 105 000333-41-5
115 THORIUM-228 809.96 111 014274-82-9
116 RADON-222 809.92 116 014859-67-7
117 CHRYSENE 807.53 115 000218-01-9
118 STRONTIUM-90 807.17 125 010098-97-2
119 CHRYSOTILE ASBESTOS 806.97 118 012001-29-5
120 METHYLMERCURY 806.94 127 022967-92-6
121 POLONIUM-210 806.74 117 013981-52-7
122 COAL TARS 806.47 121 008007-45-2
123 PLUTONIUM-239 806.20 130 015117-48-3
124 PLUTONIUM-238 806.00 122 013981-16-3
125 CHLORPYRIFOS 805.50 128 002921-88-2
126 LEAD-210 805.23 129 014255-04-0
127 AMERICIUM-241 804.96 132 086954-36-1
128 THORON (RADON-220) 804.93 123 022481-48-7
129 COPPER 804.32 124 007440-50-8
130 IODINE-131 803.72 133 010043-66-0
131 PLUTONIUM 803.49 131 007440-07-5
132 NEPTUNIUM-237 802.95 NEW 013994-20-2
133 AMOSITE ASBESTOS 802.75 134 012172-73-5
134 GUTHION 802.48 134 000086-50-0
135 CHLORDECONE 801.74 138 000143-50-0
135 PLUTONIUM-240 801.74 138 014119-33-6
135 TRIBUTYLTIN 801.74 138 000688-73-3
138 MANGANESE 801.62 141 007439-96-5
139 HYDROGEN CYANIDE 799.57 NEW 000074-90-8
140 S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE 795.72 142 000078-48-8
141 BROMINE 787.92 106 007726-95-6
142 POLYBROMINATED BIPHENYLS 787.62 144 067774-32-7
143 DICOFOL 786.09 145 000115-32-2
144 SELENIUM 785.29 143 007782-49-2
145 PARATHION 783.64 146 000056-38-2
146 HEXACHLOROCYCLOHEXANE, TECHNICAL 775.72 147 000608-73-1
147 PENTACHLOROBENZENE 772.32 148 000608-93-5
148 1,2,3-TRICHLOROBENZENE 771.72 190 000087-61-6
149 TRICHLOROFLUOROETHANE 770.06 149 027154-33-2
150 TREFLAN (TRIFLURALIN) 769.22 150 001582-09-8
151 4,4'-METHYLENEBIS(2-CHLOROANILINE) 766.34 151 000101-14-4
152 DDD, O,P'- 763.14 153 000053-19-0
153 HEXACHLORODIBENZO-P-DIOXIN 761.61 154 034465-46-8
154 HEPTACHLORODIBENZO-P-DIOXIN 755.72 155 037871-00-4
155 2-METHYLNAPHTHALENE 752.62 156 000091-57-6
156 1,1-DICHLOROETHANE 749.54 152 000075-34-3
157 1,1,2-TRICHLOROETHANE 744.26 157 000079-00-5
158 ACENAPHTHENE 743.38 159 000083-32-9
159 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 743.07 160 039001-02-0
160 AMMONIA 741.26 158 007664-41-7
161 1,4-DICHLOROBENZENE 726.92 167 000106-46-7
162 PHENOL 721.78 161 000108-95-2
163 HEPTACHLORODIBENZOFURAN 721.77 165 038998-75-3
164 TRICHLOROETHANE 719.49 162 025323-89-1
165 HEXACHLOROCYCLOPENTADIENE 717.01 166 000077-47-4
166 1,2-DIPHENYLHYDRAZINE 716.60 168 000122-66-7
167 1,2-DICHLOROETHENE, TRANS- 712.02 164 000156-60-5
168 TETRACHLOROBIPHENYL 711.16 230 026914-33-0
169 CRESOL, PARA- 706.70 169 000106-44-5
170 OXYCHLORDANE 705.39 172 027304-13-8
171 2,3,4,7,8-PENTACHLORODIBENZOFURAN 704.56 173 057117-31-4
172 HEXACHLORODIBENZOFURAN 703.92 176 055684-94-1
173 PALLADIUM 703.50 238 007440-05-3
174 CARBON DISULFIDE 703.06 183 000075-15-0
175 GAMMA-CHLORDENE 702.19 NEW 056641-38-4
176 AMERICIUM 701.69 179 007440-35-9
177 DIBENZOFURAN 701.07 186 000132-64-9
178 1,2-DICHLOROBENZENE 700.98 170 000095-50-1
179 TETRACHLOROPHENOL 700.59 182 025167-83-3
180 INDENO(1,2,3-CD)PYRENE 700.29 185 000193-39-5
181 ACETONE 696.98 175 000067-64-1
182 CHLOROETHANE 693.20 184 000075-00-3
183 P-XYLENE 687.06 187 000106-42-3
184 2,4-DIMETHYLPHENOL 685.59 188 000105-67-9
185 AROCLOR 1268 684.85 189 011100-14-4
186 ALUMINUM 682.13 193 007429-90-5
187 HYDROGEN SULFIDE 680.14 192 007783-06-4
188 PENTACHLORODIBENZOFURAN 678.52 191 030402-15-4
189 TETRACHLOROETHANE 671.79 194 025322-20-7
190 CHLOROMETHANE 668.35 199 000074-87-3
191 BIS(2-METHOXYETHYL) PHTHALATE 665.55 NEW 034006-76-3
192 BUTYL BENZYL PHTHALATE 663.28 198 000085-68-7
193 1,2,4-TRICHLOROBENZENE 660.89 196 000120-82-1
194 CRESOL, ORTHO- 659.45 195 000095-48-7
195 1,3-BUTADIENE 657.68 NEW 000106-99-0
196 HEXACHLOROETHANE 654.96 197 000067-72-1
197 VANADIUM 649.51 200 007440-62-2
198 CARBON MONOXIDE 646.60 NEW 000630-08-0
199 TETRACHLORODIBENZO-P-DIOXIN 643.71 202 041903-57-5
200 1,3-DICHLOROBENZENE 643.68 201 000541-73-1
201 PENTACHLORODIBENZO-P-DIOXIN 632.83 205 036088-22-9
202 1,2-DICHLOROETHYLENE 630.18 209 000540-59-0
203 2,3,7,8-TETRACHLORODIBENZOFURAN 628.94 206 051207-31-9
204 2-BUTANONE 626.20 203 000078-93-3
205 N-NITROSODIPHENYLAMINE 625.83 204 000086-30-6
206 2,4-DICHLOROPHENOL 621.20 208 000120-83-2
207 SILVER 620.74 207 007440-22-4
208 BROMOFORM 616.59 210 000075-25-2
209 CESIUM-137 611.77 113 010045-97-3
210 2,4,5-TRICHLOROPHENOL 611.57 213 000095-95-4
211 CHROMIUM TRIOXIDE 611.30 212 007738-94-5
212 NITRITE 609.07 222 014797-65-0
213 DINITROTOLUENE 608.01 NEW 025321-14-6
214 NONACHLOR, TRANS- 607.78 214 039765-80-5
214 POTASSIUM-40 607.78 120 013966-00-2
216 NITRATE 606.61 217 014797-55-8
217 THORIUM-227 605.70 119 015623-47-9
218 COAL TAR PITCH 605.53 215 065996-93-2
219 PHENANTHRENE 605.08 216 000085-01-8
220 ARSENIC TRIOXIDE 604.53 218 001327-53-3
221 NONACHLOR, CIS- 604.26 219 005103-73-1
222 ANTIMONY 603.97 251 007440-36-0
223 ARSENIC ACID 603.52 223 007778-39-4
224 PHORATE 603.25 224 000298-02-2
225 DIMETHOATE 602.75 225 000060-51-5
226 ACTINIUM-227 602.63 NEW 014952-40-0
226 STROBANE 602.63 227 008001-50-1
228 4-AMINOBIPHENYL 602.57 230 000092-67-1
228 BENZOPYRENE 602.57 177 073467-76-2
228 PYRETHRUM 602.57 230 008003-34-7
231 ARSINE 602.52 229 007784-42-1
232 NALED 602.48 228 000300-76-5
233 DIBENZOFURANS, CHLORINATED 602.25 233 042934-53-2
233 ETHOPROP 602.25 233 013194-48-4
233 NITROGEN DIOXIDE 602.25 233 010102-44-0
236 CARBOPHENOTHION 602.01 236 000786-19-6
237 DICHLORVOS 601.74 238 000062-73-7
237 N-NITROSODIMETHYLAMINE 601.74 257 000062-75-9
237 OZONE 601.74 238 010028-15-6
240 ALPHA CHLORDENE 601.51 NEW 056534-02-2
240 CALCIUM ARSENATE 601.51 241 007778-44-1
240 MERCURIC CHLORIDE 601.51 241 007487-94-7
240 URANIUM-233 601.51 241 013968-55-3
244 CRESOLS 597.22 252 001319-77-3
245 FORMALDEHYDE 592.62 256 000050-00-0
246 2,4-D ACID 588.18 250 000094-75-7
247 2-CHLOROPHENOL 587.29 254 000095-57-8
248 HYDROGEN FLUORIDE 586.28 NEW 007664-39-3
249 PYRENE 584.37 253 000129-00-0
250 CHLORODIBROMOMETHANE 582.14 258 000124-48-1
251 DICHLOROBENZENE 578.15 255 025321-22-6
252 BUTYLATE 576.19 259 002008-41-5
253 DICHLOROETHANE 575.51 260 001300-21-6
254 ETHYL ETHER 571.38 264 000060-29-7
255 DIMETHYL FORMAMIDE 571.30 262 000068-12-2
256 4-NITROPHENOL 568.53 265 000100-02-7
257 1,3-DICHLOROPROPENE, CIS- 563.86 263 010061-01-5
258 TRICHLOROBENZENE 557.08 267 012002-48-1
259 1,3-DICHLOROPROPENE, TRANS- 554.10 266 010061-02-6
260 PHOSPHINE 553.29 NEW 007803-51-2
261 FLUORIDE 546.26 268 016984-48-8
262 METHYL PARATHION 545.94 271 000298-00-0
263 2,6-DINITROTOLUENE 543.95 270 000606-20-2
264 METHYL ISOBUTYL KETONE 536.33 272 000108-10-1
265 STYRENE 534.84 274 000100-42-5
266 CARBAZOLE 534.34 NEW 000086-74-8
267 OCTACHLORODIBENZO-P-DIOXIN 533.72 273 003268-87-9
268 1,2-DICHLOROETHENE, CIS- 532.02 NEW 000156-59-2
269 CARBARYL 531.41 NEW 000063-25-2
270 FLUORENE 530.87 275 000086-73-7
271 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 529.06 NEW 035822-46-9
272 1-METHYLNAPHTHALENE 528.79 NEW 000090-12-0
273 MALATHION 526.46 NEW 000121-75-5
274 1,3-DINITROBENZENE 526.02 261 000099-65-0
275 1,4-DIOXANE 525.25 NEW 000123-91-1

Additional Resources

Key Resources

Top