UN2818: Ammonium polysulfide, solution
UN2818 appears 2 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 8, packing group II, III.
All §172.101 entries for UN2818
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Ammonium polysulfide, solution | 8 | II | 8, 6.1 |
| Ammonium polysulfide, solution | 8 | III | 8, 6.1 |
Open any entry for packaging sections, special provisions, air limits and vessel stowage.
What it means
Packing group ranks danger within the class: PG II = medium danger; PG III = minor danger.
Label codes (column 6): 8, 6.1 → Corrosive label + subsidiary Poison / Toxic 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 UN2818 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN2818
What is UN2818?
UN2818 is the identification number for Ammonium polysulfide, solution in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN2818?
UN2818 is listed under hazard class 8 (corrosive).
What packing group is UN2818?
Packing group for UN2818: II, III. Where several rows exist, the packing group that fits your material decides which row applies.