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HomeUN NumbersClass 4.2UN3186
Hazard Class 4.2Packing Group II/III

UN Number

UN3186

Self-heating liquid, inorganic, n.o.s

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

2 rows in 49 CFR 172.101 for UN3186.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GSelf-heating liquid, inorganic, n.o.s4.2II4.2IB2, W31None2022421 L5 LC—
GSelf-heating liquid, inorganic, n.o.s4.2III4.2IB2, W31None2032415 L60 LC—
  • Sym.: Column 1 symbols, 49 CFR 172.101(b).
  • Description: Column 2, the proper shipping name, 172.101(c).
  • Class: Column 3, hazard class or division, 172.101(d).
  • PG: Column 5, packing group, 172.101(f).
  • Labels: Column 6, label codes, 172.101(g).
  • Special provisions: Column 7, codes explained in 49 CFR 172.102, 172.101(h).
  • 8A / 8B / 8C: Packaging exceptions, non-bulk and bulk sections of 49 CFR part 173 (an entry of 202 means 173.202), 172.101(i).
  • 9A / 9B: Maximum quantity per package on passenger aircraft or rail, and on cargo aircraft only, 172.101(j).
  • 10A / 10B: Vessel stowage location and other stowage and handling codes, 172.101(k).

Division 4.2 — Spontaneously Combustible Material

See the full class list

Spontaneously combustible material (Division 4.2) includes a pyrophoric material — a liquid or solid that, even in small quantities and without an external ignition source, can ignite within five minutes after coming in contact with air — and self-heating material.

Source: 49 CFR 173.124 (eCFR).

Previous / next UN number

UN3185Self-heating liquid, corrosive, organic, n.o.sUN3187Self-heating liquid, toxic, inorganic, n.o.s

Nearby Class 4.2 UN Numbers

UN3174Titanium disulphideUN3183Self-heating liquid, organic, n.o.sUN3184Self-heating liquid, toxic, organic, n.o.sUN3188Self-heating liquid, corrosive, inorganic, n.o.sUN3189Metal powder, self-heating, n.o.sUN3190Self-heating solid, inorganic, n.o.s
View the full Class 4.2 list →

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