What is UN 3209?
UN 3209: Metallic substance, water-reactive, self-heating, n.o.s. US class 4.3; PG I, II, III.
- UN number
- UN 3209
- Proper shipping name (first listed)
- Metallic substance, water-reactive, self-heating, n.o.s
- US class or division (first name)
- 4.3
- Packing groups (first name)
- I, II, III
- Source rows for this UN number
- 3
- Table jurisdiction
- United States HMT; not an ADR table
- Version
- 49 CFR 172.101, revised 1 October 2025
- Official source
- US Government Publishing Office, 49 CFR 172.101 HMT
Source row 2138
Proper shipping name: Metallic substance, water-reactive, self-heating, n.o.s.
Full column-2 description: Metallic substance, water-reactive, self-heating, n.o.s
US hazard class or division: 4.3. Packing group: I.
Column-1 symbols: G.
Source row 2139
Proper shipping name: Metallic substance, water-reactive, self-heating, n.o.s.
Full column-2 description: Metallic substance, water-reactive, self-heating, n.o.s
US hazard class or division: 4.3. Packing group: II.
Column-1 symbols: G.
Source row 2140
Proper shipping name: Metallic substance, water-reactive, self-heating, n.o.s.
Full column-2 description: Metallic substance, water-reactive, self-heating, n.o.s
US hazard class or division: 4.3. Packing group: III.
Column-1 symbols: G.
Before shipping
Check the current ADR edition before shipping. This is a US HMT reference snapshot, not ADR classification or shipping, legal or safety advice.
This page omits the other HMT columns. Check the full official table, its symbols and applicable provisions for your consignment.
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