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2013 PRIORITY LIST OF HAZARDOUS SUBSTANCES

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2013

Rank Substance Name TotalPoints

2011

Rank CAS #

1 ARSENIC 1670.4 1 007440-38-2

2 LEAD 1529.2 2 007439-92-1

3 MERCURY 1458.6 3 007439-97-6

4 VINYL CHLORIDE 1359.8 4 000075-01-4

5 POLYCHLORINATED BIPHENYLS 1343.5 5 001336-36-3

6 BENZENE 1328.5 6 000071-43-2

7 CADMIUM 1318.7 7 007440-43-9

8 BENZO(A)PYRENE 1304.7 8 000050-32-8

9 POLYCYCLIC AROMATIC HYDROCARBONS 1279.7 9 130498-29-2

10 BENZO(B)FLUORANTHENE 1251.2 10 000205-99-2

11 CHLOROFORM 1203.5 11 000067-66-3

12 AROCLOR 1260 1190.3 12 011096-82-5

13 DDT, P,P'- 1181.5 13 000050-29-3

14 AROCLOR 1254 1171.2 14 011097-69-1

15 DIBENZO(A,H)ANTHRACENE 1155.4 15 000053-70-3

16 TRICHLOROETHYLENE 1151.4 16 000079-01-6

17 CHROMIUM, HEXAVALENT 1146.9 17 018540-29-9

18 DIELDRIN 1142.5 18 000060-57-1

19 PHOSPHORUS, WHITE 1141.4 19 007723-14-0

20 HEXACHLOROBUTADIENE 1128.2 20 000087-68-3

21 DDE, P,P'- 1126.2 21 000072-55-9

22 CHLORDANE 1125.9 22 000057-74-9

23 COAL TAR CREOSOTE 1124.5 23 008001-58-9

24 AROCLOR 1242 1124.3 24 053469-21-9

25 ALDRIN 1114.6 25 000309-00-2

26 DDD, P,P'- 1113.3 26 000072-54-8

27 AROCLOR 1248 1103.8 27 012672-29-6

28 HEPTACHLOR 1100.7 28 000076-44-8

29 AROCLOR 1099.4 29 012767-79-2

30 BENZIDINE 1090.5 30 000092-87-5

31 ACROLEIN 1088.4 31 000107-02-8

32 TOXAPHENE 1087.4 32 008001-35-2

33 TETRACHLOROETHYLENE 1075.7 33 000127-18-4

34 HEXACHLOROCYCLOHEXANE, GAMMA- 1074.9 34 000058-89-9

35 CYANIDE 1070.2 35 000057-12-5

36 HEXACHLOROCYCLOHEXANE, BETA- 1053.5 36 000319-85-7

37 DISULFOTON 1047.1 38 000298-04-4

38 BENZO(A)ANTHRACENE 1046.0 37 000056-55-3

39 1,2-DIBROMOETHANE 1041.7 39 000106-93-4

40 ENDRIN 1037.7 40 000072-20-8

41 DIAZINON 1036.6 41 000333-41-5
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Rank Substance Name TotalPoints

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Rank CAS #

42 HEXACHLOROCYCLOHEXANE, DELTA- 1034.8 42 000319-86-8

43 BERYLLIUM 1031.0 43 007440-41-7

44 ENDOSULFAN 1027.7 44 000115-29-7

45 AROCLOR 1221 1027.0 45 011104-28-2

46 1,2-DIBROMO-3-CHLOROPROPANE 1025.7 46 000096-12-8

47 HEPTACHLOR EPOXIDE 1020.9 47 001024-57-3

48 ENDOSULFAN, ALPHA 1018.0 48 000959-98-8

49 CIS-CHLORDANE 1015.6 49 005103-71-9

50 CARBON TETRACHLORIDE 1012.6 50 000056-23-5

51 COBALT 1011.7 52 007440-48-4

52 AROCLOR 1016 1011.5 51 012674-11-2

53 DDT, O,P'- 1007.8 54 000789-02-6

54 PENTACHLOROPHENOL 1007.6 53 000087-86-5

55 METHOXYCHLOR 1005.9 55 000072-43-5

56 ENDOSULFAN SULFATE 1003.4 56 001031-07-8

57 NICKEL 996.2 57 007440-02-0

58 DI-N-BUTYL PHTHALATE 994.9 58 000084-74-2

59 ENDRIN KETONE 991.6 59 053494-70-5

60 DIBROMOCHLOROPROPANE 982.9 60 067708-83-2

61 BENZO(K)FLUORANTHENE 971.3 61 000207-08-9

62 TRANS-CHLORDANE 967.8 63 005103-74-2

63 ENDOSULFAN, BETA 967.2 64 033213-65-9

64 XYLENES, TOTAL 965.3 62 001330-20-7

65 CHLORPYRIFOS 963.8 65 002921-88-2

66 CHROMIUM(VI) TRIOXIDE 960.0 66 001333-82-0

67 AROCLOR 1232 957.9 67 011141-16-5

68 ENDRIN ALDEHYDE 957.4 68 007421-93-4

69 METHANE 952.8 69 000074-82-8

70 3,3'-DICHLOROBENZIDINE 940.4 72 000091-94-1

71 2-HEXANONE 940.3 70 000591-78-6

72 2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN 939.9 71 001746-01-6

73 BENZOFLUORANTHENE 935.6 73 056832-73-6

74 TOLUENE 918.8 74 000108-88-3

75 ZINC 915.5 75 007440-66-6

76 PENTACHLOROBENZENE 906.8 77 000608-93-5

77 DI(2-ETHYLHEXYL)PHTHALATE 905.2 76 000117-81-7

78 CHROMIUM 896.4 78 007440-47-3

79 AROCLOR 1240 888.3 79 071328-89-7

80 NAPHTHALENE 878.0 80 000091-20-3

81 2,4,6-TRINITROTOLUENE 877.3 82 000118-96-7

82 1,1-DICHLOROETHENE 876.6 81 000075-35-4
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Rank Substance Name TotalPoints

2011

Rank CAS #

83 BROMODICHLOROETHANE 866.2 85 000683-53-4

84 2,4,6-TRICHLOROPHENOL 866.0 83 000088-06-2

85 BIS(2-CHLOROETHYL) ETHER 865.9 84 000111-44-4

86 DDD, O,P'- 865.6 87 000053-19-0

87 HYDRAZINE 860.8 88 000302-01-2

88 METHYLENE CHLORIDE 860.8 86 000075-09-2

89 2,4-DINITROPHENOL 858.1 89 000051-28-5

90 4,4'-METHYLENEBIS(2-CHLOROANILINE) 857.3 90 000101-14-4

91 1,2-DICHLOROETHANE 853.3 91 000107-06-2

92 THIOCYANATE 845.8 92 000302-04-5

93 HEXACHLOROBENZENE 843.6 93 000118-74-1

94 ASBESTOS 840.9 94 001332-21-4

95 RADIUM-226 832.9 95 013982-63-3

96 RDX (Cyclonite) 831.9 96 000121-82-4

97 URANIUM 831.4 97 007440-61-1

98 2,4-DINITROTOLUENE 830.8 98 000121-14-2

99 ETHION 829.9 99 000563-12-2

100 RADIUM 827.3 100 007440-14-4

101 4,6-DINITRO-O-CRESOL 827.0 101 000534-52-1

102 THORIUM 824.0 102 007440-29-1

103 DIMETHYLARSINIC ACID 821.1 103 000075-60-5

104 CHLORINE 820.3 104 007782-50-5

105 1,3,5-TRINITROBENZENE 818.5 106 000099-35-4

106 RADON 818.4 105 010043-92-2

107 HEXACHLOROCYCLOHEXANE, ALPHA- 816.7 107 000319-84-6

108 RADIUM-228 815.1 108 015262-20-1

109 THORIUM-230 813.6 109 014269-63-7

110 URANIUM-235 812.0 111 015117-96-1

111 THORIUM-228 810.2 113 014274-82-9

112 URANIUM-234 809.5 112 013966-29-5

113 RADON-222 809.2 114 014859-67-7

114 1,1,1-TRICHLOROETHANE 808.4 110 000071-55-6

115 COAL TARS 808.1 115 008007-45-2

116 METHYLMERCURY 807.2 120 022967-92-6

117 N-NITROSODI-N-PROPYLAMINE 807.2 118 000621-64-7

118 COPPER 806.9 125 007440-50-8

119 CHRYSOTILE ASBESTOS 806.1 119 012001-29-5

120 PLUTONIUM-239 805.9 120 015117-48-3

121 POLONIUM-210 805.5 122 013981-52-7

122 PLUTONIUM-238 805.2 123 013981-16-3

123 LEAD-210 805.1 124 014255-04-0
AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY

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Rank Substance Name TotalPoints

2011

Rank CAS #

124 CHLOROBENZENE 804.3 117 000108-90-7

125 AMOSITE ASBESTOS 804.2 127 012172-73-5

125 PLUTONIUM 804.2 127 007440-07-5

125 STRONTIUM-90 804.2 127 010098-97-2

128 RADON-220 804.2 130 022481-48-7

129 AMERICIUM-241 803.8 131 086954-36-1

130 ETHYLBENZENE 803.5 116 000100-41-4

131 BARIUM 802.8 126 007440-39-3

132 AZINPHOS-METHYL 802.5 134 000086-50-0

133 CHLORDECONE 802.1 135 000143-50-0

134 NEPTUNIUM-237 801.9 136 013994-20-2

135 HYDROGEN CYANIDE 801.6 137 000074-90-8

136 PLUTONIUM-240 801.4 138 014119-33-6

137 1,2,3-TRICHLOROBENZENE 800.1 139 000087-61-6

138 FLUORANTHENE 800.0 133 000206-44-0

139 MANGANESE 798.8 140 007439-96-5

140 S,S,S-TRIBUTYL PHOSPHOROTRITHIOATE 797.5 141 000078-48-8

141 CHRYSENE 791.8 142 000218-01-9

142 2,4,5-TRICHLOROPHENOL 790.2 143 000095-95-4

143 POLYBROMINATED BIPHENYLS 784.2 144 067774-32-7

144 DICOFOL 783.7 145 000115-32-2

145 SELENIUM 776.4 146 007782-49-2

146 1,1,2,2-TETRACHLOROETHANE 775.8 147 000079-34-5

147 HEPTACHLORODIBENZO-P-DIOXIN 773.4 148 037871-00-4

148 PARATHION 773.3 149 000056-38-2

149 HEXACHLOROCYCLOHEXANE, TECHNICAL GRADE 772.9 150 000608-73-1

150 TRICHLOROFLUOROETHANE 772.3 151 027154-33-2

151 BROMINE 770.0 152 007726-95-6

152 AROCLOR 1268 763.8 New 011100-14-4

153 1,3-BUTADIENE 760.9 155 000106-99-0

154 HEPTACHLORODIBENZOFURAN 755.2 153 038998-75-3

155 TRIFLURALIN 754.2 154 001582-09-8

156 1,2,3,4,6,7,8,9-OCTACHLORODIBENZOFURAN 742.6 156 039001-02-0

157 AMMONIA 741.2 157 007664-41-7

158 2-METHYLNAPHTHALENE 726.8 158 000091-57-6

159 1,4-DICHLOROBENZENE 723.4 159 000106-46-7

160 2,3,4,7,8-PENTACHLORODIBENZOFURAN 723.4 161 057117-31-4

161 1,1-DICHLOROETHANE 722.5 160 000075-34-3

162 NALED 720.4 162 000300-76-5

163 1,1,2-TRICHLOROETHANE 719.5 165 000079-00-5

164 HEXACHLOROCYCLOPENTADIENE 717.9 163 000077-47-4
AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY

2013 PRIORITY LIST OF HAZARDOUS SUBSTANCES

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Rank Substance Name TotalPoints

2011

Rank CAS #

165 1,2-DIPHENYLHYDRAZINE 717.6 164 000122-66-7

166 PHORATE 715.0 166 000298-02-2

167 TRICHLOROETHANE 712.3 167 025323-89-1

168 ACENAPHTHENE 710.2 168 000083-32-9

169 TETRACHLOROBIPHENYL 709.1 169 026914-33-0

170 OXYCHLORDANE 705.4 170 027304-13-8

171 PALLADIUM 705.3 171 007440-05-3

172 CRESOL, PARA- 703.2 172 000106-44-5

173 GAMMA-CHLORDENE 701.9 174 056641-38-4

174 INDENO(1,2,3-CD)PYRENE 701.8 173 000193-39-5

175 TETRACHLOROPHENOL 696.9 176 025167-83-3

176 1,2-DICHLOROBENZENE 696.6 175 000095-50-1

177 1,2-DICHLOROETHENE, TRANS- 692.3 177 000156-60-5

178 CHLOROETHANE 687.2 178 000075-00-3

179 ALUMINUM 686.6 181 007429-90-5

180 PHENOL 686.1 179 000108-95-2

181 P-XYLENE 685.9 180 000106-42-3

182 CARBON MONOXIDE 682.2 183 000630-08-0

183 CARBON DISULFIDE 681.8 182 000075-15-0

184 2,4-DIMETHYLPHENOL 679.2 184 000105-67-9

185 DIBENZOFURAN 675.8 185 000132-64-9

186 ACETONE 673.1 186 000067-64-1

187 HEXACHLOROETHANE 669.2 187 000067-72-1

188 BUTYL METHYL PHTHALATE 667.3 188 034006-76-3

189 CHLOROMETHANE 665.0 189 000074-87-3

190 HEXACHLORODIBENZOFURAN 659.7 190 055684-94-1

191 BUTYL BENZYL PHTHALATE 657.6 191 000085-68-7

192 HYDROGEN SULFIDE 656.2 192 007783-06-4

193 DICHLORVOS 655.3 193 000062-73-7

194 DIBENZOFURANS, CHLORINATED 652.8 195 042934-53-2

195 CRESOL, ORTHO- 652.4 194 000095-48-7

196 HEXACHLORODIBENZO-P-DIOXIN 651.3 196 034465-46-8

197 VANADIUM 649.8 197 007440-62-2

198 N-NITROSODIMETHYLAMINE 648.2 198 000062-75-9

199 1,2,4-TRICHLOROBENZENE 646.4 199 000120-82-1

200 ETHOPROP 643.5 200 013194-48-4

201 TETRACHLORODIBENZO-P-DIOXIN 641.0 201 041903-57-5

202 BROMOFORM 634.3 202 000075-25-2

203 PENTACHLORODIBENZOFURAN 631.3 203 030402-15-4

204 1,3-DICHLOROBENZENE 627.7 204 000541-73-1

205 PENTACHLORODIBENZO-P-DIOXIN 625.4 205 036088-22-9
AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY

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Rank Substance Name TotalPoints

2011

Rank CAS #

206 N-NITROSODIPHENYLAMINE 624.7 206 000086-30-6

207 2,3,7,8-TETRACHLORODIBENZOFURAN 618.7 207 051207-31-9

208 2,4-DICHLOROPHENOL 618.0 208 000120-83-2

209 2,3-DIMETHYLNAPHTHALENE 617.5 209 000581-40-8

210 1,4-DIOXANE 614.8 210 000123-91-1

211 FLUORINE 613.2 211 007782-41-4

212 CESIUM-137 609.9 214 010045-97-3

212 CHROMIC ACID 609.9 214 007738-94-5

214 NITRITE 608.9 216 014797-65-0

215 2-BUTANONE 608.3 212 000078-93-3

216 1,2-DICHLOROETHYLENE 608.0 213 000540-59-0

217 POTASSIUM-40 607.5 218 013966-00-2

218 DINITROTOLUENE 607.2 219 025321-14-6

219 SILVER 605.4 217 007440-22-4

220 COAL TAR PITCH 605.2 221 065996-93-2

221 NITRATE 605.1 220 014797-55-8

222 THORIUM-227 604.9 222 015623-47-9

223 ARSENIC ACID 604.3 223 007778-39-4

224 FORMALDEHYDE 604.2 241 000050-00-0

225 ARSENIC TRIOXIDE 603.8 224 001327-53-3

226 BENZOPYRENE 603.4 225 073467-76-2

227 CHLORDANE, TECHNICAL 602.5 226 012789-03-6

228 STROBANE 602.5 227 008001-50-1

229 4-AMINOBIPHENYL 602.4 228 000092-67-1

229 PYRETHRUM 602.4 228 008003-34-7

231 ARSINE 602.4 230 007784-42-1

231 DIMETHOATE 602.4 230 000060-51-5

233 CARBOPHENOTHION 601.9 233 000786-19-6

234 ALPHA-CHLORDENE 601.4 234 056534-02-2

234 IODINE-131 601.4 234 010043-66-0

234 MERCURIC CHLORIDE 601.4 234 007487-94-7

234 SODIUM ARSENITE 601.4 234 007784-46-5

234 URANIUM-233 601.4 234 013968-55-3

239 ANTIMONY 600.7 232 007440-36-0

240 DIBROMOCHLOROMETHANE 599.5 239 000124-48-1

241 CRESOLS 596.7 240 001319-77-3

242 DICHLOROBENZENE 594.9 242 025321-22-6

243 2,4-D ACID 594.3 243 000094-75-7

244 2-CHLOROPHENOL 590.6 244 000095-57-8

245 BUTYLATE 589.8 245 002008-41-5

246 PHENANTHRENE 585.2 246 000085-01-8
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Rank Substance Name TotalPoints

2011

Rank CAS #

247 DIMETHYL FORMAMIDE 585.2 247 000068-12-2

248 4-NITROPHENOL 579.4 248 000100-02-7

249 DIURON 578.7 249 000330-54-1

250 TETRACHLOROETHANE 576.4 250 025322-20-7

251 DICHLOROETHANE 567.4 251 001300-21-6

252 ETHYL ETHER 564.9 252 000060-29-7

253 DIMETHYLANILINE 561.7 254 000121-69-7

254 PYRENE 561.3 253 000129-00-0

255 1,3-DICHLOROPROPENE, CIS- 560.5 255 010061-01-5

256 1,2,3,4,6,7,8-HEPTACHLORODIBENZO-P-DIOXIN 558.6 256 035822-46-9

257 PHOSPHINE 555.2 257 007803-51-2

258 TRICHLOROBENZENE 554.9 258 012002-48-1

259 2,6-DINITROTOLUENE 554.0 259 000606-20-2

260 FLUORIDE ION 549.0 260 016984-48-8

261 1,2,3,4,6,7,8-HEPTACHLORODIBENZOFURAN 548.5 261 067562-39-4

262 PENTAERYTHRITOL TETRANITRATE 548.1 262 000078-11-5

263 1,3-DICHLOROPROPENE, TRANS- 547.6 263 010061-02-6

264 ACRYLONITRILE 543.0 264 000107-13-1

265 BIS(2-ETHYLHEXYL)ADIPATE 542.2 265 000103-23-1

266 CARBAZOLE 538.7 266 000086-74-8

267 METOLACHLOR 538.1 267 051218-45-2

268 2-CHLOROANILINE 537.9 268 000095-51-2

269 1,2,3-TRICHLOROPROPANE 535.9 269 000096-18-4

270 CARBARYL 535.4 270 000063-25-2

271 1,2-DICHLOROETHENE, CIS- 534.5 271 000156-59-2

272 STYRENE 528.1 273 000100-42-5

273 METHYL ISOBUTYL KETONE 527.6 272 000108-10-1

274 THALLIUM 524.7 274 007440-28-0

275 1,2,3,7,8,9-HEXACHLORODIBENZOFURAN 524.0 275 072918-21-9

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

scores.

CAS #= Chemical Abstracts Service Registry Number

www.atsdr.cdc.gov/SPL