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HomeUN NumbersClass 4.3UN3399
Hazard Class 4.3Packing Group I/II/III

UN Number

UN3399

Organometallic substance, liquid, water-reactive, flammable

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

3 rows in 49 CFR 172.101 for UN3399.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GOrganometallic substance, liquid, water-reactive, flammable4.3I4.3, 3T13, TP2, TP7, TP36, TP47, W31None201244Forbidden1 LD13, 40, 52, 148
GOrganometallic substance, liquid, water-reactive, flammable4.3II4.3, 3IB1, IP2, T7, TP2, TP7, TP36, TP47, W311512022431 L5 LD13, 40, 52, 148
GOrganometallic substance, liquid, water-reactive, flammable4.3III4.3, 3IB2, IP4, T7, TP2, TP7, TP36, TP47, W311512032425 L60 LE13, 40, 52, 148
  • 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

UN3398Organometallic substance, liquid, water-reactiveUN3400Organometallic substance, solid, self-heating

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View the full Class 4.3 list →

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