UN3299: Ethylene oxide and tetrafluoroethane…
As listed: Ethylene oxide and tetrafluoroethane mixture with not more than 5.6 percent ethylene oxide
UN3299 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 2.2.
All §172.101 entries for UN3299
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Ethylene oxide and tetrafluoroethane mixture with not more than 5.6 percent ethylene oxide | 2.2 | — | 2.2 |
Open any entry for packaging sections, special provisions, air limits and vessel stowage.
What it means
Label codes (column 6): 2.2 → Non-flammable gas 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 UN3299 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN3299
What is UN3299?
UN3299 is the identification number for Ethylene oxide and tetrafluoroethane mixture in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN3299?
UN3299 is listed under hazard class 2.2 (non-flammable, non-poisonous gas).
What packing group is UN3299?
Packing group for UN3299: not assigned. Where several rows exist, the packing group that fits your material decides which row applies.