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UN identification number

UN3091: Lithium metal batteries contained in…

As listed: Lithium metal batteries contained in equipment including lithium alloy batteries

UN3091 appears 2 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 9.

ID numberUN3091
Hazard class9
Packing groupnot assigned
Label codes9

All §172.101 entries for UN3091

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

What it means

9
Class 9 — Miscellaneous hazardous material. Materials that present a hazard during transport but don't meet another class — for example lithium batteries, dry ice, and environmentally hazardous substances.

Label codes (column 6): 9 → Class 9 label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN3091, Lithium metal batteries contained in equipment, 9

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

  1. Match the name. Compare your SDS Section 14 to the proper shipping names above and pick the row with your packing group.
  2. Read the special provisions on the entry page (§172.102) — they can add limits or exceptions.
  3. Check packaging — the entry page lists the Part 173 sections for exceptions, non-bulk and bulk.
  4. Labels & placards. Placarding depends on class and quantity — see Table 1 vs Table 2.
  5. Emergency response. Find the response guide for UN3091 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN3091

What is UN3091?

UN3091 is the identification number for Lithium metal batteries contained in equipment; Lithium metal batteries packed with equipment in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN3091?

UN3091 is listed under hazard class 9 (miscellaneous hazardous material).

What packing group is UN3091?

Packing group for UN3091: not assigned. Where several rows exist, the packing group that fits your material decides which row applies.

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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.