# Compounds, tree killing liquid or Compounds, weed killing, liquid · USPS · I, II — Mailing and air-carriage restrictions by item category

For Compounds, tree killing liquid or Compounds, weed killing, liquid · USPS · I, II, item category is Compounds, tree killing liquid or Compounds, weed killing, liquid; carrier is USPS; dot packing group is I, II; restriction type is prohibited; scope is domestic mail (air and surface), recorded from its source on 2026-09-08.

- **Item category:** Compounds, tree killing liquid or Compounds, weed killing, liquid _(verified: appears in the quote below)_
- **Carrier:** USPS _(our reading, not quoted from the source)_
- **DOT packing group:** I, II _(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, NA2810, packing group I, II; domestic mail air: Prohibited; domestic mail surface: Prohibited

## What the source says

> Compounds, tree killing liquid or Compounds, weed killing, liquid 6.1 NA2810 I, II Prohibited Prohibited

## Source

- https://pe.usps.com/cpim/ftp/pubs/pub52/pub52.pdf

Last verified: 2026-09-08. Review by: 2027-09-08.
Part of [Mailing and air-carriage restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).