HazmatTable logoHAZMATTABLE
Home / UN numbers / UN1297
UN identification number

UN1297: Trimethylamine, aqueous solutions

As listed: Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass

UN1297 appears 3 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 3, packing group I, II, III.

ID numberUN1297
Hazard class3
Packing groupI, II, III
Label codes3, 8

All §172.101 entries for UN1297

Proper shipping nameClassPGLabels
Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass3I3, 8
Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass3II3, 8
Trimethylamine, aqueous solutions with not more than 50 percent trimethylamine by mass3III3, 8

Open any entry for packaging sections, special provisions, air limits and vessel stowage.

What it means

3
Class 3 — Flammable liquid. Liquids that give off vapors that can ignite — for example gasoline, acetone, and many solvents.

Packing group ranks danger within the class: PG I = great danger; PG II = medium danger; PG III = minor danger.

Label codes (column 6): 3, 8 → Flammable liquid label + subsidiary Corrosive label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1297, Trimethylamine, aqueous solutions, 3, PG I

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

  1. Match the name. Compare your SDS Section 14 to the proper shipping names above and pick the row with your packing group.
  2. Read the special provisions on the entry page (§172.102) — they can add limits or exceptions.
  3. Check packaging — the entry page lists the Part 173 sections for exceptions, non-bulk and bulk.
  4. Labels & placards. Placarding depends on class and quantity — see Table 1 vs Table 2.
  5. Emergency response. Find the response guide for UN1297 in the current PHMSA Emergency Response Guidebook.
How to Read a Hazmat Table Entry poster
Free download

Get the HazmatTable Field Guide poster pack

8 printable hazmat reference posters — reading a table entry, hazard classes, placards, segregation, shipping papers and more. Free, sent to your inbox.

Get the free pack →

Common questions about UN1297

What is UN1297?

UN1297 is the identification number for Trimethylamine, aqueous solutions in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1297?

UN1297 is listed under hazard class 3 (flammable liquid).

What packing group is UN1297?

Packing group for UN1297: I, II, III. Where several rows exist, the packing group that fits your material decides which row applies.

Looking up materials every day? Unlimited searches are $5/mo — or add AI Search to ask questions in plain English.
See plans →
← UN1296All UN numbersAll Class 3 materialsUN1298 →
Source: Hazardous Materials Table (49 CFR §172.101), eCFR.gov — current as of Oct 23, 2026. View the official table. Reference only — verify current requirements before shipping.