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HomeUN NumbersClass 4.1UN3531
Hazard Class 4.1Packing Group III

UN Number

UN3531

Polymerizing substance, solid, stabilized, n.o.s.

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

One row in 49 CFR 172.101 for UN3531.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GPolymerizing substance, solid, stabilized, n.o.s.4.1III4.1387, IB7, IP19, N92, T7, TP4, TP6, TP33None21324010 kg25 kgD25, 52, 53
  • 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 4.1 — Flammable Solid

See the full class list

Flammable solid (Division 4.1) covers desensitized explosives, self-reactive materials that are thermally unstable and can undergo exothermic decomposition without participation of oxygen, and readily combustible solids.

Source: 49 CFR 173.124 (eCFR).

Previous / next UN number

UN3530Engine, internal combustion or Machinery, internal combustionUN3532Polymerizing substance, liquid, stabilized, n.o.s.

Nearby Class 4.1 UN Numbers

UN33764-Nitrophenylhydrazine, with not less than 30 percent water, by massUN3380Desensitized explosive, solid, n.o.s.UN34741-Hydroxybenzotriazole, monohydrateUN3527Polyester resin kit, solid base materialUN3533Polymerizing substance, solid, temperature controlled, n.o.s.UN3534Polymerizing substance, liquid, temperature controlled, n.o.s.UN3541Articles containing flammable solid, n.o.s.
View the full Class 4.1 list →

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