UN1889: Cyanogen bromide
UN1889 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 6.1, packing group I.
All §172.101 entries for UN1889
| Proper shipping name | Class | PG | Labels |
|---|---|---|---|
| Cyanogen bromide | 6.1 | I | 6.1, 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 I = great danger.
Label codes (column 6): 6.1, 8 → Poison / Toxic label + subsidiary Corrosive label.
UN numbers are recognized for international and domestic transport.
Reportable quantity (RQ)
- Cyanogen bromide is listed in Appendix A with an RQ of 1000 lb (454 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 UN1889 in the current PHMSA Emergency Response Guidebook.
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Common questions about UN1889
What is UN1889?
UN1889 is the identification number for Cyanogen bromide in the DOT Hazardous Materials Table (49 CFR §172.101).
What hazard class is UN1889?
UN1889 is listed under hazard class 6.1 (poisonous (toxic) material).
What packing group is UN1889?
Packing group for UN1889: I. Where several rows exist, the packing group that fits your material decides which row applies.