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Passenger & cargo aircraft requirements for
Passenger aircraft carry paying passengers, with cargo in the lower hold. Passenger aircraft offer more routes, more frequent flights, and generally lower costs, but they allow smaller quantities per package.
Cargo aircraft (freighters) carry freight only, with no passengers on board. Cargo-only aircraft allow larger quantities, but they have fewer flights, longer transit times, and higher costs.
Choosing which aircraft type a shipment of UN 1120 (Butanols, II) can use is one of the first important decisions in the process.
Some dangerous goods are restricted to either passenger aircraft or cargo-only aircraft, but UN 1120 (Butanols, II) is not. It can be transported on both types of aircraft:
Passenger aircraft 💺 — PERMITTED
Cargo aircraft ✈️ — PERMITTED
"Permitted" does not mean the substance can be carried by air without restriction. It is still a dangerous good and must comply with strict packing, packaging, marking, labelling, documentation and quantity rules imposed by IATA/ICAO, as well as by individual countries and airline operators.
excepted & limited quantity provisions for
Exemptions allow you to ship smaller quantities under simplified rules, with reduced packaging, marking, and documentation compared to a full shipment. They don't remove the hazard classification—only the amount of compliance work required.
LIMITED QUANTITY
Max net quantity per package — 1 L
• Packing instruction — Y341
EXCEPTED QUANTITY
Max net quantity — 500 mL
Check carefully the inner packaging strict quantity limits
permitted packaging for
Here are the permitted packaging configurations for UN 1120 (Butanols, II):
Passenger aircraft — only combination packaging (inner + outer packaging)
Cargo aircraft — single packaging, combination or composite packaging
Excepted quantity — only combination packaging (inner + intermediate + outer packaging)
Limited quantity — only combination packaging (inner + outer packaging)
On passenger aircraft and cargo aircraft, multiple outer packaging types (materials and shapes) are permitted provided each is tested and certified to the following requirements:
UN Packing Group II (performance standards)
Packaging types and packaging systems (single, combination, composite packagings) vary depending of the packaging instructions, special provisions, country and airline restrictions.
marks & labels for
Labels and marks communicate hazards and shipping methods to ground handlers, airline crew, and emergency responders at a glance—without anyone needing to open the package or check the paperwork first.
MARKING
Packaging specification (packaging manufacturer)
Consignor
Consignee
UN/ID number
Proper shipping name
Max net quantity per package
Excepted quantity (if applicable)
Limited quantity (if applicable)
LABELLING
• Class 3 — Flammable Liquid
• Cargo Aircraft Only (if applicable)
• Package orientation
Other marking and labelling requirements must be applied for overpack, environmentally hazardous substances, lithium ion batteries, magnetized materials.
special provisions for
The ICAO/IATA Dangerous Goods Regulations include several hundred special provisions — additional requirements assigned to specific UN numbers, beyond the standard packing instructions.
When a special provision applies, it overrides the packing instruction and quantity rules shown above.
It may add packaging conditions, restrict a shipping method that would otherwise be allowed, require extra documentation, or impose limits not mentioned in the general rules.
The packing instruction alone is never the full picture. It must cross-reference with the special provisions that apply to a specific UN/ID number.
UN 1120 (Butanols, II) is subject to 1 special(s) provision(s).
State variations for
Some countries impose dangerous goods requirements that are stricter than the ICAO/IATA regulations for goods entering, leaving, or transiting their territory.
When country restrictions apply to a specific UN/ID number, it overrides the standard rules shown above — a country may limit quantities, require additional approval, or prohibit a shipping method that ICAO/IATA would otherwise permit.
UN 1120 (Butanols, II) is subject to restrictions by 4 countries.
operator variations for
Individual airline operators may impose dangerous goods requirements that are stricter than ICAO/IATA regulations. An airline operator may refuse carriage entirely, reduce the allowable quantity below the standard limits, or impose additional handling requirements.
Where an airline operator restriction applies, it overrides the general rules shown above for that specific carrier.
UN 1120 (Butanols, II) is subject to restrictions by 35 airlines.
Why is dangerous on an aircraft?
UN 1120 (Butanols, II) describes liquids that catch fire easily. Packing Group II means the liquid has a low flash point, so it gives off flammable vapours at moderate temperatures. On an aircraft, this creates a serious ignition risk from heat, sparks, static electricity, or a leaking package, and a fire could start and spread quickly inside the cargo hold.
Because aircraft cargo holds have limited oxygen and rely on fire-suppression systems, fires from highly flammable liquids are much harder to control mid-flight than on the ground, and could threaten the aircraft's structure or safety systems before landing. For this reason, UN 1120 (Butanols, II) is normally heavily restricted, requiring strict packaging, quantity limits, and labelling.