| Rank | Commodity Name | Hazard Class | Incidents |
|---|---|---|---|
| 1 | Paint or Paint-Related Material | Flammable-Combustible Liquid | 1,355 |
| 2 | Paint-Related Material (including paint thinning, drying, removing or reducing compound) | Flammable-Combustible Liquid | 1,070 |
| 3 | Flammable Liquids, N.O.S. | Flammable-Combustible Liquid | 800 |
| 4 | Paint (including paint, lacquer, enamel, stain, shellac solutions, varnish, polish, liquid filler, and liquid lacquer base) | Combustible Liquid | 612 |
| 5 | Corrosive Liquids, N.O.S. | Corrosive Material | 601 |
| 6 | Isopropanol | Flammable-Combustible Liquid | 481 |
| 7 | Sodium Hydroxide Solution | Corrosive Material | 412 |
| 8 | Fire Extinguishers | Nonflammable Compressed Gas | 320 |
| 9 | Hydrochloric Acid Solution | Corrosive Material | 319 |
| 10 | Corrosive Liquid, Basic, Inorganic | Corrosive Material | 318 |
| 11 | Printing Ink, Flammable | Flammable-Combustible Liquid | 280 |
| 12 | Resin Solution, Flammable | Flammable-Combustible Liquid | 262 |
| 13 | Corrosive Liquid, Acidic, Inorganic | Corrosive Material | 248 |
| 14 | Methanol | Flammable-Combustible Liquid | 236 |
| 15 | Consumer Commodity | Other Regulated Material, Class D | 226 |
| 16 | Alcohols, N.O.S. | Flammable-Combustible Liquid | 222 |
| 17 | Potassium Hydroxide Solution | Corrosive Material | 221 |
| 18 | Gasoline | Flammable-Combustible Liquid | 217 |
| 19 | Aerosols Flammable | Flammable Compressed Gas | 189 |
| 20 | Sulfuric Acid | Corrosive Material | 179 |
KEY: N.O.S. = Not Otherwise Specified
NOTES: Due to multiple commodities being involved in a single incident, the totals above may not correspond to the totals in other reports. Reporting requirements and the 5800.1 form were changed as of Jan. 1, 2005. Reportable incidents now include all undeclared hazardous materials shipments and specification cargo tanks that receive damage to their lading retention systems while hauling hazardous materials.
SOURCE: U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration, Hazardous Materials Information System, available at http://www.phmsa.dot.gov/staticfiles/PHMSA/DownloadableFiles/Files/2009comdrank.pdf as of July 2010.