---
type: restriction
id: usps-cleaning-agents-and-solvents-flammable-liquid
asset: shipping-restrictions-by-class
title: "Cleaning agents and solvents (flammable liquid) — Postal shipping restrictions by item category"
sources:
  - https://pe.usps.com/text/pub52/pub52c3_022.htm
source_quote: "Cleaning Agents and Solvents: A flammable liquid. It is mailable if it qualifies as Limited Quantity surface materials and meet the conditions in 343.21 as applicable."
generated: true
harvested: 2026-08-04
stale_after: 2027-08-04
item_category: "Cleaning agents and solvents (flammable liquid)"
carrier: "USPS"
restriction_type: "restricted"
scope: "domestic mail via surface transportation"
conditions: "Mailable if qualifies as Limited Quantity surface material and meets conditions; Packaging Instruction 3A must be followed"
verified: false
unverified_fields: carrier, conditions, item_category
---
**Item category:** Cleaning agents and solvents (flammable liquid)

**Carrier:** USPS

**Restriction type:** restricted

**Scope:** domestic mail via surface transportation

**Conditions:** Mailable if qualifies as Limited Quantity surface material and meets conditions; Packaging Instruction 3A must be followed

> Cleaning Agents and Solvents: A flammable liquid. It is mailable if it qualifies as Limited Quantity surface materials and meet the conditions in 343.21 as applicable.

Source: <https://pe.usps.com/text/pub52/pub52c3_022.htm>