# Formaldehyde solutions less than 10 percent — Postal shipping restrictions by item category

For Formaldehyde solutions less than 10 percent, carrier is FAA (air transport); restriction type is allowed; scope is carry-on and checked baggage; conditions is Not restricted as hazardous materials; leakproof packaging with absorbent material is strongly encouraged, recorded from its source on 2026-08-10.

- **Item category:** Formaldehyde solutions less than 10 percent _(verified: appears in the quote below)_
- **Carrier:** FAA (air transport) _(our reading, not quoted from the source)_
- **Restriction type:** allowed _(our reading, not quoted from the source)_
- **Scope:** carry-on and checked baggage _(our reading, not quoted from the source)_
- **Conditions:** Not restricted as hazardous materials; leakproof packaging with absorbent material is strongly encouraged. _(verified: appears in the quote below)_

## What the source says

> Formaldehyde solutions of less than 10% are not restricted as hazardous materials. Leakproof packaging with absorbent material is still strongly encouraged.

## Source

- https://www.faa.gov/hazmat/packsafe/printable-chart

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).