UN3301: Corrosive liquid, self-heating, n.o.s
UN3301 appears 2 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 8, packing group I, II.
All §172.101 entries for UN3301
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Corrosive liquid, self-heating, n.o.s | 8 | I | 8, 4.2 |
| Corrosive liquid, self-heating, n.o.s | 8 | II | 8, 4.2 |
Open any entry for packaging sections, special provisions, air limits and vessel stowage.
What it means
Packing group ranks danger within the class: PG I = great danger; PG II = medium danger.
Label codes (column 6): 8, 4.2 → Corrosive label + subsidiary Spontaneously combustible label.
UN numbers are recognized for international and domestic transport.
Example basic description
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 UN3301 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN3301
What is UN3301?
UN3301 is the identification number for Corrosive liquid, self-heating, n.o.s in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN3301?
UN3301 is listed under hazard class 8 (corrosive).
What packing group is UN3301?
Packing group for UN3301: I, II. Where several rows exist, the packing group that fits your material decides which row applies.