UN2793: Ferrous metal borings
As listed: Ferrous metal borings or Ferrous metal shavings or Ferrous metal turnings or Ferrous metal cuttings in a form liable to self-heating
UN2793 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 4.2, packing group III.
All §172.101 entries for UN2793
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Ferrous metal borings or Ferrous metal shavings or Ferrous metal turnings or Ferrous metal cuttings in a form liable to self-heating | 4.2 | III | 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 III = minor danger.
Label codes (column 6): 4.2 → 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 UN2793 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN2793
What is UN2793?
UN2793 is the identification number for Ferrous metal borings or Ferrous metal shavings or Ferrous metal turnings or Ferrous metal cuttings in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN2793?
UN2793 is listed under hazard class 4.2 (spontaneously combustible).
What packing group is UN2793?
Packing group for UN2793: III. Where several rows exist, the packing group that fits your material decides which row applies.