UN1064: Methyl mercaptan
UN1064 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 2.3.
All §172.101 entries for UN1064
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Methyl mercaptan | 2.3 | — | 2.3, 2.1 |
Open any entry for packaging sections, special provisions, air limits and vessel stowage.
What it means
Label codes (column 6): 2.3, 2.1 → Poison gas label + subsidiary Flammable gas label.
UN numbers are recognized for international and domestic transport.
Reportable quantity (RQ)
- Methyl mercaptan is listed in Appendix A with an RQ of 100 lb (45.4 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 UN1064 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN1064
What is UN1064?
UN1064 is the identification number for Methyl mercaptan in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN1064?
UN1064 is listed under hazard class 2.3 (poisonous (toxic) gas).
What packing group is UN1064?
Packing group for UN1064: not assigned. Where several rows exist, the packing group that fits your material decides which row applies.