Short answer
Alcohol-based perfume is a flammable liquid for transport purposes — US rules classify a liquid as flammable when its flash point is 60 °C (140 °F) or lower, and perfumer's alcohol flashes far below that — so shipping it is regulated. In the US, the Postal Service accepts it domestically only by surface (ground) transport as a limited-quantity hazardous material, packed and marked as Publication 52 requires; it may not go by international mail. Private carriers have their own hazardous-materials programs and contracts. Air shipments, and international shipments, follow dangerous-goods rules that require training. Check the current rules with your carrier before your first shipment.
Why perfume is a hazardous material
Ethanol is highly flammable, and a perfume is mostly ethanol. Transport rules care about flash point — the lowest temperature at which a liquid gives off enough vapor to ignite — and alcohol perfumes have flash points well below the threshold for a flammable liquid. Oil-based perfumes and solids may not be, but their concentrates can contain flammable materials; check the flash point on the safety data sheet or have it measured. Many essential oils are flammable liquids too.
USPS: what Publication 52 says
USPS Publication 52, "Hazardous, Restricted, and Perishable Mail", governs what can be mailed. As of its current edition:
- Definitions: a flammable liquid has a flash point of not more than 140 °F (60 °C); combustible liquids have higher flash points up to 200 °F.
- Domestic ground: flammable liquids may be mailed only if they qualify as limited-quantity surface materials and are packed according to the relevant packaging instruction; liquids with very low flash points are prohibited.
- Domestic air: flammable liquids are prohibited, except for certain ethanol-based products under a specific authorization with strict limits on container size and quantity.
- International mail: flammable liquids are prohibited.
Packaging instructions cover secure closures, cushioning and absorbent material, strong outer packaging, quantity limits per container and per parcel, and required markings. Read the current instructions for your product; they change.
Private carriers
UPS, FedEx and other carriers accept limited-quantity flammable liquids under their own terms, which typically require a shipping account or agreement that covers hazardous materials, specific packaging and markings, and in some cases ground-only service. Ask each carrier for its requirements in writing before you set up shipping.
Training and responsibility
In the US, people who prepare hazardous materials for transport are generally required by Department of Transportation rules to be trained for the tasks they perform. Air shipments follow international dangerous-goods rules used by airlines, with their own training requirements. If you ship regularly, budget for training, or use a fulfillment company that is already trained and set up for hazardous materials.
A practical checklist
- Know your product's flash point, from the SDS or a test, for each format you ship.
- Choose a carrier and service that accept it, and get their requirements in writing.
- Use leak-proof primary containers, secure closures (crimped sprayers or taped caps), absorbent cushioning and strong outer boxes.
- Apply the markings and labels required for limited quantities by your carrier.
- Stay within per-bottle and per-parcel quantity limits.
- Keep shipping records with batch codes, so a damaged or lost parcel can be traced.
- For samples, follow the same rules: small size does not exempt a flammable liquid. See how to make perfume samples.
Receiving materials
The same rules apply in reverse to the materials you buy: perfumer's alcohol and many raw materials ship as hazardous materials, which affects which suppliers can send them to you and at what cost. See how to source perfume raw materials. Storing them safely once they arrive is covered in perfume lab safety.
Shipping is one of the practical rules that sit alongside the cosmetics regulations described in perfume regulations by market.
Sources
- US Postal Service — Publication 52, Hazardous, Restricted, and Perishable Mail, including section 343 (flammable and combustible liquids) and Packaging Instruction 3D (ethanol-based products), August 2026 edition, checked October 9, 2026.
Frequently asked questions
Can I ship perfume internationally by mail?
Not by USPS international mail, which prohibits flammable liquids. International shipments of perfume go through carriers and services that handle dangerous goods, under the rules for the mode of transport.
Are oil-based perfumes easier to ship?
Often, if their flash point is above the flammable-liquid threshold. Check it rather than assuming; some concentrates are flammable even without alcohol.
Written and reviewed by the RUŌOD Lab team. This article is general education about perfume formulation and record-keeping; it is not legal, regulatory or safety advice, and the examples are illustrations, not validated commercial formulas. How we write and check these guides.