UN identification number

UN1139: Coating solution

As listed: Coating solution (includes surface treatments or coatings used for industrial or other purposes such as vehicle undercoating, drum or barrel lining)

UN1139 appears 3 times in the Hazardous Materials Table (49 CFR §172.101). Hazard class 3, packing group I, II, III.

ID numberUN1139

Hazard class3

Packing groupI, II, III

Label codes3

All §172.101 entries for UN1139

Proper shipping name	Class	PG	Labels
Coating solution (includes surface treatments or coatings used for industrial or other purposes such as vehicle undercoating, drum or barrel lining)	3	I	3
Coating solution (includes surface treatments or coatings used for industrial or other purposes such as vehicle undercoating, drum or barrel lining)	3	II	3
Coating solution (includes surface treatments or coatings used for industrial or other purposes such as vehicle undercoating, drum or barrel lining)	3	III	3

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

What it means

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 → Flammable liquid label.

UN numbers are recognized for international and domestic transport.

Example basic description

UN1139, Coating solution, 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

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 UN1139 in the current PHMSA Emergency Response Guidebook.

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Common questions about UN1139

What is UN1139?

UN1139 is the identification number for Coating solution in the DOT Hazardous Materials Table (49 CFR §172.101).

What hazard class is UN1139?

UN1139 is listed under hazard class 3 (flammable liquid).

What packing group is UN1139?

Packing group for UN1139: I, II, III. Where several rows exist, the packing group that fits your material decides which row applies.

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← UN1136 All UN numbers All Class 3 materials UN1143 →

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.