HazmatTable logoHAZMATTABLE
UN identification number

UN3510: Adsorbed gas, flammable, n.o.s

UN3510 appears 1 time in the Hazardous Materials Table (49 CFR §172.101). Hazard class 2.1.

ID numberUN3510
Hazard class2.1
Packing groupnot assigned
Label codes2.1

All §172.101 entries for UN3510

Proper shipping nameClassPGLabels
Adsorbed gas, flammable, n.o.s2.1—2.1

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

What it means

2.1
Class 2.1 — Flammable gas. Gases that ignite easily in air — for example propane and butane.

Label codes (column 6): 2.1 → Flammable gas label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN3510, Adsorbed gas, flammable, n.o.s, 2.1

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 UN3510 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 UN3510

What is UN3510?

UN3510 is the identification number for Adsorbed gas, flammable, n.o.s in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN3510?

UN3510 is listed under hazard class 2.1 (flammable gas).

What packing group is UN3510?

Packing group for UN3510: not assigned. 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 →
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.