UN3181 — Metal salts of organic compounds, flammable, n.o.s

Class 4.1

Quick facts: UN3181

What it is
Metal salts of organic compounds, flammable, n.o.s
Hazard class
4.1
Packing group
II, III
Label
Division 4.1 - Flammable Solid
Packaging & limits
Differ by packing group: see the UN3181 rows of the 49 CFR 172.101 table.

Source: 49 CFR 172.101 Hazardous Materials Table — UN3181 (2025-01-01)

UN Number
UN3181
Hazard Class
4.1
Packing Group
Not assigned

Hazard Labels / Marks

  • Division 4.1 - Flammable Solid

Note

Packing group varies (II/III) by concentration or form per the §172.101 row — verify against the current edition for your material.

Source: 49 CFR §172.101 Hazardous Materials Table · 49 CFR §172.101 (2025-01-01)

Reference data transcribed from the published Dangerous Goods List. It is not legal advice and may not capture entry-specific exceptions, special provisions or packing-group ranges. Always verify against the current regulation edition for a specific shipment.

This is the reference entry for UN3181.

To verify your actual package — labels, marks, SDS and packaging — scan it with DG Inspector. It reads the real evidence in front of you and shows the reasoning so you can check it.

A reference lookup is a dictionary, not a compliance verdict. It tells you what UN3181 requires; it cannot confirm that your specific shipment meets those requirements.

Scan your package — Start Free