Guide
Agricultural chemical toll blending services
Updated
Toll blending for agriculture adds one federal question to every other: if the product is a pesticide, the site that formulates it must be a registered establishment.
Talk to a specialist Who owns the materials, who carries the price risk, and the clauses to settle before a formulation leaves your building.
Pesticides are made only in registered establishments
EPA states that FIFRA Section 7 requires production of pesticides, active ingredients or devices to be conducted in a registered pesticide-producing establishment, and that production includes formulation, packaging, repackaging, labeling and relabeling. Production in an unregistered establishment is a violation of the law.
EPA also says that a company acting as a licensed contractor of another company must have its own company number. So a toll blender formulating your pesticide needs its own registration, and its EPA establishment number goes on the label or immediate container of each product it produces.
Source: EPA, Pesticide establishment registration and reporting (read 30 Oct 2026)
The reports the site files
EPA requires an initial production report 30 days after the company is notified of its establishment number, then an annual report on or before March 1, even when nothing was produced. Failure to file can lead to termination of the establishment's registration, civil penalties of up to $7,500 per violation or criminal penalties.
Ask a blender for its establishment number and confirm it against EPA's published list of active registered establishments before you send material.
Source: EPA, Pesticide establishment registration and reporting (read 30 Oct 2026)
Toll blending agriculture products that are not pesticides
Fertilizers, adjuvants and other agricultural inputs that are not pesticides fall outside that federal registration but may be regulated by the state where they are sold. Ask the blender which state registrations it holds and which it expects you to hold.