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1999 ATSDR Substance Priority List

1999 RANK SUBSTANCE NAME TOTAL
POINTS		 1997 RANK CAS RN
1 ARSENIC 1641.13 1 007440-38-2 
2 LEAD 1525.49 2 007439-92-1 
3 MERCURY 1507.64 3 007439-97-6 
4 VINYL CHLORIDE 1387.85 4 000075-01-4 
5 BENZENE 1364.96 5 000071-43-2 
6 POLYCHLORINATED BIPHENYLS 1352.69 6 001336-36-3 
7 CADMIUM 1317.83 7 007440-43-9 
8 BENZO(A)PYRENE 1295.56 8 000050-32-8 
9 POLYCYCLIC AROMATIC HYDROCARBONS 1274.22 10 130498-29-2 
10 BENZO(B)FLUORANTHENE 1262.86 9 000205-99-2
11 CHLOROFORM 1238.31 11 000067-66-3
12 DDT, P,P'- 1186.79 13 000050-29-3
13 AROCLOR 1260 1182.49 14 011096-82-5
14 AROCLOR 1254 1177.17 12 011097-69-1
15 TRICHLOROETHYLENE 1159.64 15 000079-01-6
16 CHROMIUM, HEXAVALENT 1151.62 16 018540-29-9
17 DIBENZO(A,H)ANTHRACENE 1151.04 17 000053-70-3
18 DIELDRIN 1140.86 18 000060-57-1
19 HEXACHLOROBUTADIENE 1129.27 19 000087-68-3
20 DDE, P,P'- 1126.36 22 000072-55-9
21 CREOSOTE 1124.19 21 008001-58-9
22 CHLORDANE 1123.93 20 000057-74-9
23 BENZIDINE 1115.29 23 000092-87-5
24 ALDRIN 1112.25 25 000309-00-2
25 AROCLOR 1248 1110.58 27 012672-29-6
26 CYANIDE 1108.82 24 000057-12-5
27 DDD, P,P'- 1107.12 26 000072-54-8
28 AROCLOR 1242 1104.26 29 053469-21-9
29 PHOSPHORUS, WHITE 1096.53 28 007723-14-0
30 HEPTACHLOR 1092.33 30 000076-44-8
31 TETRACHLOROETHYLENE 1079.84 33 000127-18-4
32 TOXAPHENE 1078.47 31 008001-35-2
33 HEXACHLOROCYCLOHEXANE, GAMMA- 1076.46 32 000058-89-9
34 HEXACHLOROCYCLOHEXANE, BETA- 1061.86 35 000319-85-7
35 BENZO(A)ANTHRACENE 1056.05 38 000056-55-3
36 1,2-DIBROMOETHANE 1055.21 36 000106-93-4
37 DISULFOTON 1052.87 37 000298-04-4
38 ENDRIN 1043.85 39 000072-20-8
39 BERYLLIUM 1036.39 44 007440-41-7
40 HEXACHLOROCYCLOHEXANE, DELTA- 1035.67 41 000319-86-8
41 AROCLOR 1221 1034.55 34 011104-28-2
42 DI-N-BUTYL PHTHALATE 1029.66 42 000084-74-2
43 1,2-DIBROMO-3-CHLOROPROPANE 1026.97 43 000096-12-8
44 PENTACHLOROPHENOL 1024.00 45 000087-86-5
45 AROCLOR 1016 1020.24 40 012674-11-2
46 CARBON TETRACHLORIDE 1019.73 46 000056-23-5
47 HEPTACHLOR EPOXIDE 1017.05 52 001024-57-3
48 XYLENES, TOTAL 1011.71 83 001330-20-7
49 COBALT 1010.56 47 007440-48-4
50 ENDOSULFAN SULFATE 1010.22 50 001031-07-8
51 DDT, O,P'- 1009.79 NEW 000789-02-6
52 NICKEL 1007.12 49 007440-02-0
53 3,3'-DICHLOROBENZIDINE 1003.56 51 000091-94-1
54 DIBROMOCHLOROPROPANE 992.42 54 067708-83-2
55 ENDOSULFAN, ALPHA 991.88 48 000959-98-8
56 ENDOSULFAN 988.85 53 000115-29-7
57 BENZO(K)FLUORANTHENE 984.44 59 000207-08-9
58 AROCLOR 984.38 55 012767-79-2
59 ENDRIN KETONE 971.97 57 053494-70-5
60 CIS-CHLORDANE 969.93 62 005103-71-9
61 2-HEXANONE 968.01 60 000591-78-6
62 TOLUENE 965.07 61 000108-88-3
63 AROCLOR 1232 961.15 58 011141-16-5
64 ENDOSULFAN, BETA 960.22 56 033213-65-9
65 METHANE 959.61 63 000074-82-8
66 TRANS-CHLORDANE 956.10 64 005103-74-2
67 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 948.51 66 001746-01-6
68 BENZOFLUORANTHENE 947.12 71 056832-73-6
69 ENDRIN ALDEHYDE 944.52 84 007421-93-4
70 ZINC 931.94 65 007440-66-6
71 DIMETHYLARSINIC ACID 928.41 94 000075-60-5
72 DI(2-ETHYLHEXYL)PHTHALATE 924.69 67 000117-81-7
73 CHROMIUM 913.61 69 007440-47-3
74 METHYLENE CHLORIDE 903.26 70 000075-09-2
75 NAPHTHALENE 899.12 72 000091-20-3
76 METHOXYCHLOR 898.95 68 000072-43-5
77 1,1-DICHLOROETHENE 894.62 73 000075-35-4
78 AROCLOR 1240 884.91 NEW 071328-89-7
79 BIS(2-CHLOROETHYL) ETHER 869.57 76 000111-44-4
80 1,2-DICHLOROETHANE 869.08 74 000107-06-2
81 2,4-DINITROPHENOL 866.03 77 000051-28-5
82 2,4,6-TRINITROTOLUENE 864.61 78 000118-96-7
83 2,4,6-TRICHLOROPHENOL 860.94 82 000088-06-2
84 CHLORINE 852.04 152 007782-50-5
85 CYCLOTRIMETHYLENETRINITRAMINE (RDX) 851.76 75 000121-82-4
86 1,1,1-TRICHLOROETHANE 850.10 79 000071-55-6
87 ETHYLBENZENE 848.03 81 000100-41-4
88 1,1,2,2-TETRACHLOROETHANE 844.67 80 000079-34-5
89 THIOCYANATE 842.99 85 000302-04-5
90 ASBESTOS 841.68 86 001332-21-4
91 4,6-DINITRO-O-CRESOL 836.74 87 000534-52-1
92 URANIUM 832.01 88 007440-61-1
93 RADIUM 830.22 90 007440-14-4
94 RADIUM-226 829.87 91 013982-63-3
95 HEXACHLOROBENZENE 829.67 93 000118-74-1
96 ETHION 829.44 92 000563-12-2
97 THORIUM 824.80 95 007440-29-1
98 CHLOROBENZENE 823.89 89 000108-90-7
99 BARIUM 822.46 98 007440-39-3
100 2,4-DINITROTOLUENE 821.29 99 000121-14-2
101 FLUORANTHENE 820.84 96 000206-44-0
102 RADON 817.31 97 010043-92-2
103 RADIUM-228 813.44 102 015262-20-1
104 THORIUM-230 813.18 101 014269-63-7
105 DIAZINON 813.17 100 000333-41-5
106 BROMINE 813.01 161 007726-95-6
107 1,3,5-TRINITROBENZENE 812.50 105 000099-35-4
108 URANIUM-235 811.84 103 015117-96-1
109 TRITIUM 811.30 109 010028-17-8
110 URANIUM-234 811.02 104 013966-29-5
111 THORIUM-228 810.25 106 014274-82-9
112 N-NITROSODI-N-PROPYLAMINE 810.14 107 000621-64-7
113 CESIUM-137 809.95 110 010045-97-3
114 HEXACHLOROCYCLOHEXANE, ALPHA- 809.22 108 000319-84-6
115 CHRYSENE 809.16 116 000218-01-9
116 RADON-222 807.58 111 014859-67-7
117 POLONIUM-210 807.27 112 013981-52-7
118 CHRYSOTILE ASBESTOS 807.01 113 012001-29-5
119 THORIUM-227 806.21 115 015623-47-9
120 POTASSIUM-40 806.18 123 013966-00-2
121 COAL TARS 805.94 119 008007-45-2
122 PLUTONIUM-238 805.92 118 013981-16-3
123 THORON (RADON-220) 805.42 117 022481-48-7
124 COPPER 805.37 136 007440-50-8
125 STRONTIUM-90 805.12 125 010098-97-2
126 COBALT-60 805.10 121 010198-40-0
127 METHYLMERCURY 804.88 114 022967-92-6
128 CHLORPYRIFOS 804.85 120 002921-88-2
129 LEAD-210 804.59 122 014255-04-0
130 PLUTONIUM-239 804.57 123 015117-48-3
131 PLUTONIUM 803.77 126 007440-07-5
132 AMERICIUM-241 803.49 126 086954-36-1
133 IODINE-131 803.24 128 010043-66-0
134 AMOSITE ASBESTOS 802.42 129 012172-73-5
134 GUTHION 802.42 129 000086-50-0
136 BISMUTH-214 802.16 131 014733-03-0
136 LEAD-214 802.16 131 015067-28-4
138 CHLORDECONE 801.89 133 000143-50-0
138 PLUTONIUM-240 801.89 133 014119-33-6
138 TRIBUTYLTIN 801.89 133 000688-73-3
141 MANGANESE 794.62 138 007439-96-5
142 S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE 794.35 137 000078-48-8
143 SELENIUM 788.16 142 007782-49-2
144 POLYBROMINATED BIPHENYLS 786.35 139 067774-32-7
145 DICOFOL 784.76 140 000115-32-2
146 PARATHION 778.00 143 000056-38-2
147 HEXACHLOROCYCLOHEXANE, TECHNICAL 776.82 144 000608-73-1
148 PENTACHLOROBENZENE 771.00 146 000608-93-5
149 TRICHLOROFLUOROETHANE 768.57 147 027154-33-2
150 TREFLAN (TRIFLURALIN) 767.88 NEW 001582-09-8
151 4,4'-METHYLENEBIS(2-CHLOROANILINE) 764.81 149 000101-14-4
152 1,1-DICHLOROETHANE 763.84 145 000075-34-3
153 DDD, O,P'- 761.79 NEW 000053-19-0
154 HEXACHLORODIBENZO-P-DIOXIN 761.30 150 034465-46-8
155 HEPTACHLORODIBENZO-P-DIOXIN 755.51 141 037871-00-4
156 2-METHYLNAPHTHALENE 745.41 156 000091-57-6
157 1,1,2-TRICHLOROETHANE 745.11 151 000079-00-5
158 AMMONIA 743.40 153 007664-41-7
159 ACENAPHTHENE 742.02 155 000083-32-9
160 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 742.00 148 039001-02-0
161 PHENOL 731.76 158 000108-95-2
162 TRICHLOROETHANE 726.26 160 025323-89-1
163 CHROMIUM(VI) TRIOXIDE 725.07 159 001333-82-0
164 1,2-DICHLOROETHENE, TRANS- 724.90 157 000156-60-5
165 HEPTACHLORODIBENZOFURAN 720.55 154 038998-75-3
166 HEXACHLOROCYCLOPENTADIENE 715.93 188 000077-47-4
167 1,4-DICHLOROBENZENE 714.97 162 000106-46-7
168 1,2-DIPHENYLHYDRAZINE 711.14 168 000122-66-7
169 CRESOL, PARA- 710.31 255 000106-44-5
170 1,2-DICHLOROBENZENE 707.53 163 000095-50-1
171 LEAD-212 705.80 164 015092-94-1
172 OXYCHLORDANE 705.04 165 027304-13-8
173 2,3,4,7,8-PENTACHLORODIBENZOFURAN 704.18 207 057117-31-4
174 RADIUM-224 703.65 166 013233-32-4
175 ACETONE 703.21 173 000067-64-1
176 HEXACHLORODIBENZOFURAN 702.90 174 055684-94-1
177 BENZOPYRENE 702.36 NEW 073467-76-2
177 BISMUTH-212 702.36 167 014913-49-6
179 AMERICIUM 701.82 NEW 007440-35-9
179 CESIUM-134 701.82 NEW 013967-70-9
179 CHROMIUM-51 701.82 NEW 014392-02-0
182 TETRACHLOROPHENOL 699.57 169 025167-83-3
183 CARBON DISULFIDE 698.16 170 000075-15-0
184 CHLOROETHANE 697.94 172 000075-00-3
185 INDENO(1,2,3-CD)PYRENE 697.75 177 000193-39-5
186 DIBENZOFURAN 690.90 175 000132-64-9
187 P-XYLENE 690.07 NEW 000106-42-3
188 2,4-DIMETHYLPHENOL 688.71 176 000105-67-9
189 AROCLOR 1268 683.40 NEW 011100-14-4
190 1,2,3-TRICHLOROBENZENE 679.54 179 000087-61-6
191 PENTACHLORODIBENZOFURAN 677.39 181 030402-15-4
192 HYDROGEN SULFIDE 677.00 171 007783-06-4
193 ALUMINUM 676.84 178 007429-90-5
194 TETRACHLOROETHANE 669.36 180 025322-20-7
195 CRESOL, ORTHO- 664.16 NEW 000095-48-7
196 1,2,4-TRICHLOROBENZENE 660.56 184 000120-82-1
197 HEXACHLOROETHANE 655.00 182 000067-72-1
198 BUTYL BENZYL PHTHALATE 654.79 183 000085-68-7
199 CHLOROMETHANE 654.06 185 000074-87-3
200 VANADIUM 643.53 186 007440-62-2
201 1,3-DICHLOROBENZENE 643.23 199 000541-73-1
202 TETRACHLORODIBENZO-P-DIOXIN 642.53 187 041903-57-5
203 2-BUTANONE 635.58 190 000078-93-3
204 N-NITROSODIPHENYLAMINE 631.62 189 000086-30-6
205 PENTACHLORODIBENZO-P-DIOXIN 631.35 191 036088-22-9
206 2,3,7,8-TETRACHLORODIBENZOFURAN 626.69 193 051207-31-9
207 SILVER 623.74 196 007440-22-4
208 2,4-DICHLOROPHENOL 620.85 233 000120-83-2
209 1,2-DICHLOROETHYLENE 619.36 230 000540-59-0
210 BROMOFORM 616.50 197 000075-25-2
211 ACROLEIN 615.42 194 000107-02-8
212 CHROMIC ACID 612.07 195 007738-94-5
213 2,4,5-TRICHLOROPHENOL 610.20 237 000095-95-4
214 NONACHLOR, TRANS- 608.32 198 039765-80-5
215 COAL TAR PITCH 605.90 201 065996-93-2
216 PHENANTHRENE 605.07 232 000085-01-8
217 NITRATE 604.93 229 014797-55-8
218 ARSENIC TRIOXIDE 604.83 204 001327-53-3
219 NONACHLOR, CIS- 604.57 202 005103-73-1
220 HYDRAZINE 604.49 203 000302-01-2
221 TECHNETIUM-99 604.29 208 014133-76-7
222 NITRITE 603.81 231 014797-65-0
223 ARSENIC ACID 603.75 205 007778-39-4
224 PHORATE 603.49 206 000298-02-2
225 BROMODICHLOROETHANE 602.96 209 000683-53-4
225 DIMETHOATE 602.96 209 000060-51-5
227 STROBANE 602.75 212 008001-50-1
228 NALED 602.70 211 000300-76-5
229 ARSINE 602.68 213 007784-42-1
230 4-AMINOBIPHENYL 602.68 214 000092-67-1
230 PYRETHRUM 602.68 214 008003-34-7
230 TETRACHLOROBIPHENYL 602.68 214 026914-33-0
233 DIBENZOFURANS, CHLORINATED 602.42 217 042934-53-2
233 ETHOPROP 602.42 217 013194-48-4
233 NITROGEN DIOXIDE 602.42 217 010102-44-0
236 CARBOPHENOTHION 602.15 220 000786-19-6
236 THORIUM-234 602.15 220 015065-10-8
238 DICHLORVOS 601.89 222 000062-73-7
238 OZONE 601.89 222 010028-15-6
238 PALLADIUM 601.89 275 007440-05-3
241 CALCIUM ARSENATE 601.61 NEW 007778-44-1
241 CARBON-14 601.61 224 014762-75-5
241 EUROPIUM-154 601.61 NEW 015585-10-1
241 KRYPTON-85 601.61 NEW 013983-27-2
241 MERCURIC CHLORIDE 601.61 224 007487-94-7
241 SODIUM-22 601.61 224 013966-32-0
241 STRONTIUM-89 601.61 NEW 014158-27-1
241 SULFUR-35 601.61 224 015117-53-0
241 URANIUM-233 601.61 224 013968-55-3
250 2,4-D ACID 600.48 238 000094-75-7
251 ANTIMONY 597.56 241 007440-36-0
252 CRESOLS 594.47 NEW 001319-77-3
253 PYRENE 587.22 236 000129-00-0
254 2-CHLOROPHENOL 585.82 200 000095-57-8
255 DICHLOROBENZENE 585.69 234 025321-22-6
256 FORMALDEHYDE 584.81 235 000050-00-0
257 N-NITROSODIMETHYLAMINE 583.18 NEW 000062-75-9
258 CHLORODIBROMOMETHANE 582.62 239 000124-48-1
259 SUTAN 574.87 243 002008-41-5
260 DICHLOROETHANE 572.77 244 001300-21-6
261 1,3-DINITROBENZENE 572.75 247 000099-65-0
262 DIMETHYL FORMAMIDE 570.95 240 000068-12-2
263 1,3-DICHLOROPROPENE, CIS- 570.88 245 010061-01-5
264 ETHYL ETHER 570.18 246 000060-29-7
265 4-NITROPHENOL 562.24 252 000100-02-7
266 1,3-DICHLOROPROPENE, TRANS- 556.18 257 010061-02-6
267 TRICHLOROBENZENE 555.00 251 012002-48-1
268 FLUORIDE 551.20 249 016984-48-8
269 1,2-DICHLOROPROPANE 548.48 256 000078-87-5
270 2,6-DINITROTOLUENE 546.27 250 000606-20-2
271 METHYL PARATHION 544.25 254 000298-00-0
272 METHYL ISOBUTYL KETONE 541.79 253 000108-10-1
273 OCTACHLORODIBENZO-P-DIOXIN 533.34 248 003268-87-9
274 STYRENE 532.90 258 000100-42-5
275 FLUORENE 531.23 260 000086-73-7

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