Which part of the EPA registration number identifies the product itself?

The second set of numbers in the EPA registration number uniquely identifies the specific product. This portion of the number, often referred to as the "product number," is critical because it distinguishes one pesticide product from another, even if they are produced by the same company.

The first set of numbers refers to the manufacturer or registrant code, which identifies the company that manufactured or registered the product with the Environmental Protection Agency. The last set of numbers typically serves as a sequence number or indicates the formulation type, and the third set of letters may denote a special use or classification within the registration system, but it does not directly identify the product itself.

Understanding the structure of the EPA registration number is essential for anyone working in vector control as it helps in accurately identifying and verifying pesticide products used in the field.