The following brief overviews provide basic information about some pesticide ingredients that are frequently the subject of searches on our site and through external search engines. We are continuing to work on fact sheets to add to this site. 

• 2,4-D
• CCA
• Chlorpyrifos
• Creosote
• DDT (use discontinued in the U.S.)
• DEET
• Glyphosate
• Methomyl
• Monosodium methanearsonate (MSMA), an organic arsenical

To learn about about additonal pesticide ingredients, see How to Search for Chemicals and Labels.