Beyond Batteries: Other Dangerous Goods in Medical Equipment Shipments

Lithium batteries are the most commonly discussed hazard in medical equipment logistics, but they are far from the only one. Refurbished hospital equipment frequently contains compressed gases, powerful magnets, radioactive sources, high-powered lasers, and — in older legacy devices — mercury. Each of these hazards is separately regulated under international transport law, and each requires its own classification, packaging, and documentation approach. Exporters and importers who overlook these secondary hazards risk shipment delays, carrier refusals, customs holds, and safety incidents.

This article surveys the most common non-battery dangerous goods found in used medical equipment and summarizes the regulatory basics for each.

Compressed Gas Cylinders

Anesthesia machines, oxygen concentrators, ventilators, and blood gas analyzers are often shipped with, or connected to, compressed gas cylinders — most commonly medical oxygen, nitrous oxide, medical air, or carbon dioxide.

Compressed gases are Class 2 dangerous goods under both the UN Model Regulations and the U.S. Hazardous Materials Regulations (49 CFR Part 173, Subpart G). Medical oxygen, for example, is shipped under UN1072, Oxygen, compressed, Class 2.2 (non-flammable gas) with a 5.1 (oxidizer) subsidiary risk (PHMSA 49 CFR Part 173).

Key compliance points:

• General requirements for cylinder shipment — 49 CFR §173.301 sets out general conditions for shipping compressed gases in cylinders, UN pressure receptacles, and pressure vessels, including valve protection, pressure relief device requirements, and retest date verification.
• Cylinders must be current on hydrostatic retest. Most DOT/UN specification cylinders require periodic retesting (commonly every 5 or 10 years depending on cylinder type); an expired retest date makes the cylinder unfit for transport.
• Valve protection is mandatory — via a cap, guard, or valve recess — to prevent accidental discharge during handling.
• Cylinders must normally be shipped empty or depressurized when part of a used equipment sale, unless the shipper has full dangerous goods certification for compressed gas transport. Many exporters of used anesthesia and oxygen equipment ship units without cylinders and instruct the buyer to source cylinders locally, which avoids the Class 2 shipping requirements entirely.
• Under the IATA DGR / IMDG Code (for air and ocean transport respectively), compressed gas cylinders are subject to specific packing instructions, and non-flammable gases like medical oxygen and medical air are generally forbidden on passenger aircraft in cylinder form and must move as cargo-only or by ocean freight with a full dangerous goods declaration.

Practical recommendation: Ship anesthesia machines, ventilators, and oxygen concentrators without pressurized cylinders attached. Advise the buyer to procure locally certified, empty cylinders for filling in-country. This removes a major compliance burden and avoids cylinder-related customs disputes.

MRI Magnets and Cryogens

MRI systems present a unique combination of hazards: a permanent, powerful magnetic field; cryogenic liquid helium (used to cool superconducting magnets to near absolute zero); and the risk of a "quench" — a sudden loss of superconductivity that causes the helium to rapidly boil off and vent as gas.

• Helium used for MRI cooling is itself a dangerous good. The U.S. government has issued special permits addressing the transport of MRI equipment classified under UN3538 ("Articles containing non-flammable, non-toxic gas n.o.s.") in terms of the net quantity of refrigerated liquid helium contained in the magnet, since standard hazardous materials tables would otherwise forbid transport of the quantities involved (PHMSA DOT-SP 22231).
• Shipping an MRI magnet with cryogen intact requires specialized rigging, a certified DOT/IATA hazardous materials carrier, and often a special permit or equivalent exemption. Most used-equipment exporters instead arrange for the magnet to be "ramped down" (de-energized) and the helium removed or reduced to a minimal residual level by a qualified MRI service engineer before the system is decommissioned and packed for shipment.
• Even a de-energized, empty-of-cryogen magnet retains strong residual magnetism in its structure and must be handled with awareness of the field's effect on pacemakers, ferromagnetic tools, and nearby electronics during rigging and transport.
• On arrival, the receiving facility must have the magnet re-ramped and refilled with helium by a factory-authorized engineer — this is not a task for general riggers or electricians.

Practical recommendation: Always use a certified MRI de-installation team for ramp-down, cryogen venting/removal, and rigging documentation. Ensure the packing list clearly states the magnet's status (e.g., "ramped down, no cryogen") so customs and the receiving engineer know what to expect.

Radioactive Sources

Nuclear medicine equipment (gamma cameras, PET/CT systems), radiotherapy devices (linear accelerators, Cobalt-60 teletherapy units, brachytherapy afterloaders), and some calibration sources contain or use radioactive material. These are Class 7 dangerous goods under the UN Model Regulations, IMDG Code, and IATA DGR, governed internationally by the IAEA Regulations for the Safe Transport of Radioactive Material (IMO Resolution A.984(24) on carriage of Class 7 radioactive materials).

Key points for exporters of used equipment containing radioactive sources:

• A sealed source in a decommissioned device must be professionally removed and either returned to the manufacturer, transferred to a licensed disposal facility, or specifically licensed for re-export — this cannot be handled as ordinary freight. Radioactive source removal and packaging must be performed by radiation safety personnel licensed under the applicable national authority (in the U.S., typically the Nuclear Regulatory Commission or an Agreement State).
• Devices such as Cobalt-60 teletherapy units require export licensing and, in most cases, an IAEA Certificate of Competent Authority Approval for the package design before international transport.
• Empty source housings (with the source already removed and disposed of by a licensed radioactive materials handler) are generally not Class 7 dangerous goods, but documentation proving the source was removed and properly disposed of should always accompany the shipment.
• Importing countries typically require a specific import permit from their national nuclear regulatory authority before any radioactive-source-bearing device may enter, separate from ordinary medical device customs clearance.

Practical recommendation: Rotala International does not export devices with live radioactive sources installed. Any nuclear medicine or radiotherapy equipment sold must have sources professionally removed and disposed of by a licensed provider prior to shipment, with removal certification retained in the equipment file.

Class 3B and Class 4 Lasers

Surgical and aesthetic laser systems (CO2 surgical lasers, Nd:YAG lasers, diode lasers, ophthalmic lasers) are classified for safety and labeling purposes under IEC 60825-1, which establishes laser hazard classes from Class 1 (safe under all conditions) through Class 4 (hazardous even from diffuse reflections) (IEC 60825-1).

• Class 3B and Class 4 lasers — the categories used in most surgical and therapeutic laser systems — must carry specific warning labels ("LASER RADIATION — AVOID EYE OR SKIN EXPOSURE...") and an aperture label indicating the emitted wavelength and maximum output.
• Laser hazard classification itself is a product safety classification, not a transport dangerous goods classification — a laser device does not usually require a Class 9 or other dangerous goods label purely because of its optical output. However, many surgical laser systems also contain compressed gas (e.g., CO2 lasers use a gas medium) or high-capacity batteries, which do trigger dangerous goods rules independently.
• Medical laser products must also comply with the additional requirements of IEC 60601-2-22 for electrical and mechanical safety in the medical environment.
• Before export, confirm any gas cartridges, dye canisters, or battery packs associated with the laser system are assessed and handled under their own applicable hazard class.

Practical recommendation: Treat laser classification (Class 1–4) as a product-safety and labeling matter — verify the original manufacturer labels are intact and legible — while separately checking the device's gas and battery components against dangerous goods rules.

Mercury-Containing Legacy Devices

Older sphygmomanometers (blood pressure monitors), clinical thermometers, and some laboratory instruments use liquid mercury. The Minamata Convention on Mercury, a global treaty in force since 2017, phases out manufacture, import, and export of numerous mercury-added products.

• Under the Convention, Parties agreed that manufacture, import, and export of mercury-containing medical measuring devices such as thermometers and blood pressure monitors would be banned starting in 2020, except where no feasible mercury-free alternative exists or under specific exemptions (Down To Earth summary of the Minamata Convention; UNEP Global Mercury Partnership on medical measuring devices).
• Many countries that are Parties to the Convention now prohibit import of mercury sphygmomanometers and thermometers entirely, regardless of condition or refurbishment status.
• Mercury itself, if present in bulk or in a broken device, is also independently regulated as an environmentally hazardous substance / Class 9 dangerous good for transport purposes.

Practical recommendation: Rotala International does not export mercury-containing sphygmomanometers, thermometers, or similar legacy devices. Any pre-owned equipment offered for sale is screened for mercury components before listing, consistent with importing countries' obligations under the Minamata Convention.

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