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UN identification number

UN1356: Trinitrotoluene, wetted or TNT, wetted

As listed: Trinitrotoluene, wetted or TNT, wetted, with not less than 30 percent water by mass

UN1356 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 4.1, packing group I.

ID numberUN1356
Hazard class4.1
Packing groupI
Label codes4.1

All §172.101 entries for UN1356

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

What it means

4.1
Class 4.1 — Flammable solid. Solids that ignite readily or can cause fire through friction, plus self-reactive and desensitized explosive materials.

Packing group ranks danger within the class: PG I = great danger.

Label codes (column 6): 4.1 → Flammable solid label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1356, Trinitrotoluene, wetted or TNT, wetted, 4.1, PG I

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 UN1356 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN1356

What is UN1356?

UN1356 is the identification number for Trinitrotoluene, wetted or TNT, wetted in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1356?

UN1356 is listed under hazard class 4.1 (flammable solid).

What packing group is UN1356?

Packing group for UN1356: I. 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.