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HomeUN NumbersClass 4.3UN3543
Hazard Class 4.3

UN Number

UN3543

Articles containing a substance which in contact with water emits flammable gases, n.o.s.

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

One row in 49 CFR 172.101 for UN3543.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GArticles containing a substance which in contact with water emits flammable gases, n.o.s.4.3—4.3131, 391None214214ForbiddenForbidden——
  • 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 4.3 — Dangerous When Wet Material

See the full class list

Dangerous when wet material (Division 4.3) is a material that, by contact with water, is liable to become spontaneously flammable or to give off flammable or toxic gas at a rate greater than 1 L per kilogram of the material, per hour.

Source: 49 CFR 173.124 (eCFR).

Previous / next UN number

UN3542Articles containing a substance liable to spontaneous combustion, n.o.s.UN3544Articles containing oxidizing substance, n.o.s.

Nearby Class 4.3 UN Numbers

UN3403Potassium, metal alloys, solidUN3404Potassium sodium alloys, solidUN3476Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substancesUN3482Alkali metal dispersions, flammable or Alkaline earth metal dispersions, flammable
View the full Class 4.3 list →

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