If a phosphoric ester is intended for use as a pesticide — including as an active ingredient or inert ingredient in a pesticidal formulation — it must be registered under FIFRA before it can be legally imported and sold for that purpose. TSCA compliance alone is insufficient for pesticidal uses; importers should clarify the intended application with their regulatory counsel before entry.

Lactophosphates are explicitly included within this heading alongside other phosphoric esters. When used as food additives or pharmaceutical excipients, they may also be subject to FDA review under food additive or drug regulations, in addition to standard customs entry requirements. Importers should document the intended end use to facilitate correct regulatory routing at the port of entry.