The term chlorpyrifos represents which type of name for the active ingredient?

• A. Common name
• B. Chemical name
• C. Trade name
• D. Synonym

Answer: (A)

Chlorpyrifos is the common name for the active ingredient. In naming pesticides, the common (or generic) name is the standard, nonproprietary label used in regulation, labeling, and safety data. The chemical name would be a long, systematic IUPAC-style designation describing its structure, which isn’t used on labels. A trade name is a brand name assigned by a manufacturer (like Lorsban). A synonym is simply an alternative label found in some texts, but the official naming in regulatory contexts is the common name. So chlorpyrifos represents the common name.