UN identification number

UN3344: Pentaerythrite tetranitrate mixture

As listed: Pentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s., with more than 10 percent but not more than 20 percent PETN, by mass

UN3344 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 4.1, packing group II.

ID numberUN3344

Hazard class4.1

Packing groupII

Label codes4.1

All §172.101 entries for UN3344

Proper shipping name	Class	PG	Labels
Pentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s., with more than 10 percent but not more than 20 percent PETN, by mass	4.1	II	4.1

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 II = medium danger.

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

UN numbers are recognized for international and domestic transport.

Example basic description

UN3344, Pentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s., 4.1, PG II

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 UN3344 in the current PHMSA Emergency Response Guidebook.

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Common questions about UN3344

What is UN3344?

UN3344 is the identification number for Pentaerythrite tetranitrate mixture, desensitized, solid, n.o.s. or Pentaerythritol tetranitrate mixture, desensitized, solid, n.o.s. or PETN mixture, desensitized, solid, n.o.s. in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN3344?

UN3344 is listed under hazard class 4.1 (flammable solid).

What packing group is UN3344?

Packing group for UN3344: II. 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.