Substance Priority List | ATSDR

Substance Priority List | ATSDR

The ATSDR 2017 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

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