| Chemical | Road | Rail | Water | Total | % of Total |
Domestic Shipping Totals\by Route (U.S. Tons) |
|
Ammonia (NH3) |
5,793,000 |
3,470,592 |
1,718,974 |
10,982,566 |
52.8% |
75% |
|
Chlorine (Cl2) |
724,000 |
3,750,372 |
137,202 |
4,611,574 |
22.2% |
|
|
Sulfuric Acid (H2SO4) |
257,000 |
207,560 |
2,057,721 |
2,522,281 |
12.1% |
95% |
|
Acrylonitrile (C3H3N) |
29,000 |
277,200 |
671,474 |
977,674 |
4.7% |
|
|
Ethylene Oxide (C2H4Q) |
106,000 |
671,260 |
1,132 |
778,392 |
3.7% |
|
|
Hydrogen Fluoride (HF) |
29,000 |
264,560 |
293,560 |
1.4% |
99% |
|
|
Sulfur Dioxide (SO2) |
72,000 |
172,480 |
361 |
244,841 |
1.2% |
|
|
Hydrogen Chloride (HCI) |
2,000 |
8,400 |
166,027 |
176,427 |
0.8% |
|
|
Hydrogen Cyanide (HCN) |
33,000 |
31,600 |
64,600 |
0.3% |
||
|
Bromine (Br2) |
61,000 |
61,000 |
0.3% |
|||
|
Nitric Acid (HNO3) |
3,000 |
35,800 |
44 |
38,844 |
0.2% |
- Ammonia and chlorine dominate volume shipped
- Consideration of chlorine’s much greater toxicity: Chlorine is TlH of greatest concern in transport