UN identification number

UN1950: Aerosols

As listed: Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity)

UN1950 appears 5 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 2.2, 2.1.

ID numberUN1950

Hazard class2.2 2.1

Packing groupnot assigned

Label codes2.2, 8 / 2.1 / 2.2 / 2.2, 6.1

All §172.101 entries for UN1950

Proper shipping name	Class	PG	Labels
Aerosols, corrosive, Packing Group II or III, (each not exceeding 1 L capacity)	2.2	—	2.2, 8
Aerosols, flammable, (each not exceeding 1 L capacity)	2.1	—	2.1
Aerosols, flammable, n.o.s. (engine starting fluid) (each not exceeding 1 L capacity)	2.1	—	2.1
Aerosols, non-flammable, (each not exceeding 1 L capacity)	2.2	—	2.2
Aerosols, poison, Packing Group III (each not exceeding 1 L capacity)	2.2	—	2.2, 6.1

Open any entry for packaging sections, special provisions, air limits and vessel stowage.

What it means

2.2

Class 2.2 — Non-flammable, non-poisonous gas. Compressed gases that aren't flammable or toxic but can still be dangerous under pressure — for example nitrogen and compressed air.

2.1

Class 2.1 — Flammable gas. Gases that ignite easily in air — for example propane and butane.

Label codes (column 6): 2.2, 8 → Non-flammable gas label + subsidiary Corrosive label · 2.1 → Flammable gas label · 2.2 → Non-flammable gas label · 2.2, 6.1 → Non-flammable gas label + subsidiary Poison / Toxic label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1950, Aerosols, 2.2

Proper shipping name shown without the table's italic descriptive text. Order per §172.202: ID number, proper shipping name, hazard class, packing group. Example only — add technical names, “RQ”, quantities and other elements your shipment requires.

What to check next

Match the name. Compare your SDS Section 14 to the proper shipping names above and pick the row with your packing group.
Read the special provisions on the entry page (§172.102) — they can add limits or exceptions.
Check packaging — the entry page lists the Part 173 sections for exceptions, non-bulk and bulk.
Labels & placards. Placarding depends on class and quantity — see Table 1 vs Table 2.
Emergency response. Find the response guide for UN1950 in the current PHMSA Emergency Response Guidebook.

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Common questions about UN1950

What is UN1950?

UN1950 is the identification number for Aerosols; Aerosols, flammable, n.o.s. in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1950?

UN1950 is listed under hazard class 2.2, 2.1 (non-flammable, non-poisonous gas).

What packing group is UN1950?

Packing group for UN1950: not assigned. Where several rows exist, the packing group that fits your material decides which row applies.

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← UN1945 All UN numbers All Class 2.2 materials UN1951 →

Source: Hazardous Materials Table (49 CFR §172.101), eCFR.gov — current as of Oct 23, 2026. View the official table. Reference only — verify current requirements before shipping.