HazmatTable logoHAZMATTABLE
Home / UN numbers / UN2249
UN identification number

UN2249: Dichlorodimethyl ether, symmetrical

UN2249 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 6.1, packing group I.

ID numberUN2249
Hazard class6.1
Packing groupI
Label codes6.1, 3

All §172.101 entries for UN2249

Proper shipping nameClassPGLabels
Dichlorodimethyl ether, symmetrical6.1I6.1, 3

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

What it means

6.1
Class 6.1 — Poisonous (toxic) material. Materials, other than gases, that are toxic to humans if swallowed, inhaled, or absorbed through skin.

Packing group ranks danger within the class: PG I = great danger.

Label codes (column 6): 6.1, 3 → Poison / Toxic label + subsidiary Flammable liquid label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN2249, Dichlorodimethyl ether, symmetrical, 6.1, 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 UN2249 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 UN2249

What is UN2249?

UN2249 is the identification number for Dichlorodimethyl ether, symmetrical in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN2249?

UN2249 is listed under hazard class 6.1 (poisonous (toxic) material).

What packing group is UN2249?

Packing group for UN2249: I. 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 →
← UN2248All UN numbersAll Class 6.1 materialsUN2250 →
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.