Department of Homeland Security.

The Appendix A list of chemicals is released by the Department of Homeland Security (DHS). Companies that store the chemicals in the quantities listed in Appendix A must register with DHS.

Prominent ag products on the list include anhydrous ammonia, ammonium nitrate, acrolein, acetylene, difluroethane, ethane, ethylene, ethylene oxide, formaldehyde, hydrogen chloride, isobutane, isopentane, isopropylamine, propane and trinitrophenol.

To view the complete list, go to: http://www.ifca.com / documents / chemical%20security%20app%20a% 20list%20of%20chemicals% 20%20nov%202%20-%20kb.pdf.