You can ship butane legally within the United States, but because it is a flammable compressed gas, every shipment has to follow the Department of Transportation’s Hazardous Materials Regulations in 49 CFR Parts 100–185. The rules that apply to you depend on how much you’re sending, which carrier you use, and whether the package moves by ground, air, water, or mail. Get it wrong and civil penalties reach $102,348 per violation, with criminal exposure of up to five years in prison for willful or reckless conduct.
Why Butane Counts as Hazmat
The DOT’s Hazardous Materials Table lists butane under identification number UN1011 and classifies it as Hazard Class 2.1, flammable gas.1eCFR. 49 CFR 172.101 – Table of Hazardous Materials Butane vaporizes rapidly at room temperature and can ignite explosively if it leaks into a confined space. That classification drives everything else: the packaging you must use, the marks on the outside of the box, the paperwork inside, and the carriers willing to move it.
The Pipeline and Hazardous Materials Safety Administration (PHMSA) enforces the rules and applies them to anyone preparing, offering, or transporting butane. That includes not just manufacturers and freight carriers but small sellers and individuals sending a package.2eCFR. 49 CFR Chapter I – Pipeline and Hazardous Materials Safety Administration, Department of Transportation
Small Shipments Under the Limited Quantity Rule
Most people who search for how to ship butane are sending small amounts, and the regulations carve out a lighter compliance path for that. Under 49 CFR 173.306, butane qualifies as a “limited quantity” when each inner receptacle holds no more than 4 fluid ounces (7.22 cubic inches), or up to 1 liter (61.0 cubic inches) in a metal aerosol container. Total package weight cannot exceed 30 kg (66 lbs) gross.3eCFR. 49 CFR 173.306 – Limited Quantities of Compressed Gases Very small receptacles of 50 mL or less are largely exempt from the regulations altogether if the internal pressure stays below 970 kPa at 55°C.
A limited quantity package moving by ground still needs the DOT limited quantity mark on the outer box: a square-on-point at least 100 mm on each side (50 mm for smaller packages), with black borders and a white center.4eCFR. 49 CFR 172.315 – Limited Quantities For air shipments the mark adds a black “Y” in the center and sits alongside the standard air-transport markings. In exchange for the proper packaging and mark, you skip full shipping papers, placards, and most of the other requirements that apply to larger loads.
Ground Shipping in Larger Amounts
Above the limited quantity thresholds, the full regulations apply. Butane must travel in UN-rated pressure receptacles or DOT-specification cylinders built for pressurized gases.5eCFR. 49 CFR 173.301 – General Requirements for Shipment of Compressed Gases in Cylinders, UN Pressure Receptacles, and Spherical Pressure Vessels Each package needs the proper shipping name (“Butane”), the identification number UN1011, and the Hazard Class 2.1 flammable gas label. Non-bulk combination packages holding liquid butane also need two orientation arrows on opposite vertical sides so closures stay pointing up.6eCFR. 49 CFR 172.312 – Liquid Hazardous Materials in Non-Bulk Packagings
Once quantities cross placarding thresholds, the vehicle itself must display the red flammable gas placard on all four sides, and anyone handling the material needs hazmat training. Skipping the training carries a mandatory minimum civil penalty of $617 per violation.7eCFR. 49 CFR 172.704 – Training Requirements
Carriers charge a premium for accepting hazmat. UPS charges $58.00 per package for dangerous goods shipped by ground, effective December 22, 2025.8UPS. Revised Rates for Value-Added Services and Other Charges – Accessorial Matrix FedEx Ground accepts butane under specific restriction codes, with surcharges set by account. Fees are per package, so a ten-package shipment means ten surcharges.
Air Shipping and What Passengers Can Carry
Butane is marked “Forbidden” in the passenger aircraft column of the Hazardous Materials Table. You cannot ship it as cargo on any passenger flight.1eCFR. 49 CFR 172.101 – Table of Hazardous Materials Cargo-only aircraft can carry up to 150 kg per package, but the packaging and testing requirements are considerably more demanding than for ground. UPS charges $188.00 per package for air-accessible dangerous goods and $83.00 for air-inaccessible shipments.8UPS. Revised Rates for Value-Added Services and Other Charges – Accessorial Matrix
The rules for passengers on flights are different from the rules for cargo. You can carry one disposable or Zippo-style butane lighter on your person or in a carry-on. If the carry-on gets gate-checked, the lighter has to come out and stay with you in the cabin.9Federal Aviation Administration. PackSafe – Lighters Torch-style lighters with a blue jet flame are banned from carry-on and checked baggage entirely. Butane-powered hair curlers are allowed one per person in carry-on only, with the safety cover secured, but gas refill canisters are not permitted in any baggage.10eCFR. 49 CFR 175.10 – Exceptions for Passengers, Crewmembers, and Air Operators
USPS Rules Are Stricter
The Postal Service treats butane more strictly than private carriers. Butane can only be mailed domestically by surface transportation as a limited quantity, and it is completely prohibited from air mail.11Postal Explorer. 342 Gases (Hazard Class 2) That rules out Priority Mail, which moves by air.
For surface mail, no mailpiece can hold more than 4 fluid ounces in a nonmetal container or 33.8 fluid ounces (1 liter) in a metal container. The DOT limited quantity surface mark must appear on the address side. Lighters containing butane need prior written approval from USPS before mailing and must meet the conditions in Publication 52, Section 343.25.12PostalPro. Lighters
Ocean Shipments
Butane moving by water is governed by the International Maritime Dangerous Goods (IMDG) Code in addition to the HMR. The IMDG Code sets container specifications and imposes stowage and segregation rules that keep incompatible substances separated aboard the vessel.13eCFR. 49 CFR Part 172 Subpart B – Table of Hazardous Materials and Special Provisions Full shipping documentation goes with every waterborne hazmat shipment.
Shipping Papers and Emergency Contacts
Every non-exempt butane shipment travels with shipping papers listing the UN identification number (UN1011), the proper shipping name (“Butane”), the hazard class (2.1), and the total quantity with a unit of measurement. Emergency response information and a 24-hour emergency contact number must accompany the shipment.14eCFR. 49 CFR Part 172 Subpart C – Shipping Papers
Retention matters as much as preparation. Whoever provides a shipping paper must keep a copy for at least two years after the initial carrier accepts the material, or three years for hazardous waste. The copy has to stay accessible at the principal place of business for inspection.15eCFR. 49 CFR 172.201 – Preparation and Retention of Shipping Papers
If Something Goes Wrong in Transit
Anyone in physical possession of butane must call the National Response Center within 12 hours of an incident that causes death, hospitalization, a public evacuation of an hour or more, or the closure of a major transportation route for an hour or more.16eCFR. 49 CFR 171.15 – Immediate Notice of Certain Hazardous Materials Incidents The NRC number is 800-424-8802 (toll-free) or 202-267-2675. Failing to report a qualifying incident is its own violation.
What the Penalties Look Like
Civil penalties for hazmat violations reach $102,348 per violation, and each day a violation continues counts as a separate offense. When a violation causes death, serious illness, severe injury, or substantial property destruction, the cap rises to $238,809. Training violations carry a mandatory minimum penalty of $617.17eCFR. 49 CFR 107.329 – Maximum Penalties
Criminal penalties run on a separate track. Willful or reckless violations of the federal hazardous materials transportation law bring fines under Title 18 and up to five years in prison. If the violation involves a release causing death or bodily injury, the maximum prison term doubles to ten years.18Office of the Law Revision Counsel. 49 USC 5124 – Criminal Penalty The statute defines “recklessly” as deliberate indifference to the consequences of your conduct, so unfamiliarity with the rules is a weak defense when the conduct itself shows disregard for safety.