UN2215: Maleic anhydride
UN2215 appears 2 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 8, packing group III.
All §172.101 entries for UN2215
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Maleic anhydride | 8 | III | 8 |
| Maleic anhydride, molten | 8 | III | 8 |
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): 8 → Corrosive label.
UN numbers are recognized for international and domestic transport.
Reportable quantity (RQ)
- Maleic anhydride is listed in Appendix A with an RQ of 5000 lb (2270 kg).
If a single package contains the RQ or more, the material is also a hazardous substance and “RQ” is added to the shipping description. How RQ is measured →
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 UN2215 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN2215
What is UN2215?
UN2215 is the identification number for Maleic anhydride; Maleic anhydride, molten in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN2215?
UN2215 is listed under hazard class 8 (corrosive).
What packing group is UN2215?
Packing group for UN2215: III. Where several rows exist, the packing group that fits your material decides which row applies.