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HomeUN NumbersClass 4.3UN1409
Hazard Class 4.3Packing Group I/II

UN Number

UN1409

Metal hydrides, water reactive, n.o.s

Official source: 49 CFR 172.101 (eCFR)

Hazardous Materials Table entry

2 rows in 49 CFR 172.101 for UN1409.

Sym.DescriptionClassPGLabelsSpecial provisions8A8B8C9A9B10A10B
GMetal hydrides, water reactive, n.o.s4.3I4.3A19, N34, N40, W31None211242Forbidden15 kgD13, 52, 148
GMetal hydrides, water reactive, n.o.s4.3II4.3A19, IB4, N34, N40, T3, TP33, W31, W4015121224215 kg50 kgD13, 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

UN1408Ferrosilicon with 30 percent or more but less than 90 percent siliconUN1410Lithium aluminum hydride

Nearby Class 4.3 UN Numbers

UN1404Calcium hydrideUN1405Calcium silicideUN1407Cesium or CaesiumUN1411Lithium aluminum hydride, etherealUN1413Lithium borohydrideUN1414Lithium hydride
View the full Class 4.3 list →

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