# Phenoxyacetic acid derivative pesticide, solid, toxic · USPS · I — Mailing and air-carriage restrictions by item category For Phenoxyacetic acid derivative pesticide, solid, toxic · USPS · I, item category is Phenoxyacetic acid derivative pesticide, solid, toxic; carrier is USPS; dot packing group is I; restriction type is prohibited; scope is domestic mail (air and surface), recorded from its source on 2026-08-29. - **Item category:** Phenoxyacetic acid derivative pesticide, solid, toxic _(verified: appears in the quote below)_ - **Carrier:** USPS _(our reading, not quoted from the source)_ - **DOT packing group:** I _(verified: appears in the quote below)_ - **Restriction type:** prohibited _(our reading, not quoted from the source)_ - **Scope:** domestic mail (air and surface) _(our reading, not quoted from the source)_ - **Conditions:** Hazard class 6.1, UN3345, packing group I; domestic mail air: Prohibited; domestic mail surface: Prohibited ## What the source says > Phenoxyacetic acid derivative pesticide, solid, toxic 6.1 UN3345 I Prohibited Prohibited ## Source - https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf Last verified: 2026-08-29. Review by: 2027-08-29. Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).