Division 4.3 — Dangerous When Wet Material

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88 UN Numbers

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).

UN Number	Proper Shipping Name	Packing Group
UN1183	Ethyldichlorosilane	I
UN1242	Methyldichlorosilane	I
UN1295	Trichlorosilane	I
UN1340	Phosphorus pentasulfide, free from yellow or white phosphorus	II
UN1360	Calcium phosphide	I
UN1389	Alkali metal amalgam, liquid	I
UN1390	Alkali metal amides	II
UN1391	Alkali metal dispersions, or Alkaline earth metal dispersions	I
UN1392	Alkaline earth metal amalgams, liquid	I
UN1393	Alkaline earth metal alloys, n.o.s	II
UN1394	Aluminum carbide	II
UN1395	Aluminum ferrosilicon powder	II, III
UN1396	Aluminum powder, uncoated	II, III
UN1397	Aluminum phosphide	I
UN1398	Aluminum silicon powder, uncoated	III
UN1400	Barium	II
UN1401	Calcium	II
UN1402	Calcium carbide	I, II
UN1403	Calcium cyanamide with more than 0.1 percent of calcium carbide	III
UN1404	Calcium hydride	I
UN1405	Calcium silicide	II, III
UN1407	Cesium or Caesium	I
UN1408	Ferrosilicon with 30 percent or more but less than 90 percent silicon	III
UN1409	Metal hydrides, water reactive, n.o.s	I, II
UN1410	Lithium aluminum hydride	I
UN1411	Lithium aluminum hydride, ethereal	I
UN1413	Lithium borohydride	I
UN1414	Lithium hydride	I
UN1415	Lithium	I
UN1417	Lithium silicon	II
UN1418	Magnesium, powder or Magnesium alloys, powder	I, II, III
UN1419	Magnesium aluminum phosphide	I
UN1420	Potassium, metal alloys, liquid	I
UN1421	Alkali metal alloys, liquid, n.o.s	I
UN1422	Potassium sodium alloys, liquid	I
UN1423	Rubidium	I
UN1426	Sodium borohydride	I
UN1427	Sodium hydride	I
UN1428	Sodium	I
UN1432	Sodium phosphide	I
UN1433	Stannic phosphide	I
UN1435	Zinc ashes	III
UN1436	Zinc powder or Zinc dust	I, II, III
UN1714	Zinc phosphide	I
UN1870	Potassium borohydride	I
UN1928	Methyl magnesium bromide, in ethyl ether	I
UN2010	Magnesium hydride	I
UN2011	Magnesium phosphide	I
UN2012	Potassium phosphide	I
UN2013	Strontium phosphide	I
UN2257	Potassium	I
UN2463	Aluminum hydride	I
UN2624	Magnesium silicide	II
UN2805	Lithium hydride, fused solid	II
UN2806	Lithium nitride	I
UN2813	Water-reactive solid, n.o.s	I, II, III
UN2830	Lithium ferrosilicon	II
UN2835	Sodium aluminum hydride	II
UN2844	Calcium manganese silicon	III
UN2950	Magnesium granules, coated, particle size not less than 149 microns	III
UN2965	Boron trifluoride dimethyl etherate	I
UN2968	Maneb stabilized or Maneb preparations, stabilized against self-heating	III
UN2988	Chlorosilanes, water-reactive, flammable, corrosive, n.o.s	I
UN3078	Cerium, turnings or gritty powder	II
UN3129	Water-reactive liquid, corrosive, n.o.s.	I, II, III
UN3130	Water-reactive liquid, toxic, n.o.s	I, II, III
UN3131	Water-reactive solid, corrosive, n.o.s	I, II, III
UN3132	Water-reactive solid, flammable, n.o.s.	I, II, III
UN3133	Water-reactive, solid, oxidizing, n.o.s	II, III
UN3134	Water-reactive solid, toxic, n.o.s	I, II, III
UN3135	Water-reactive solid, self-heating, n.o.s.	I, II, III
UN3148	Water-reactive liquid, n.o.s.	I, II, III
UN3170	Aluminum smelting by-products or Aluminum remelting by-products	II, III
UN3208	Metallic substance, water-reactive, n.o.s	I, II, III
UN3209	Metallic substance, water-reactive, self-heating, n.o.s	I, II, III
UN3292	Batteries, containing sodium	—
UN3395	Organometallic substance, solid, water-reactive	I, II, III
UN3396	Organometallic substance, solid, water-reactive, flammable	I, II, III
UN3397	Organometallic substance, solid, water-reactive, self-heating	I, II, III
UN3398	Organometallic substance, liquid, water-reactive	I, II, III
UN3399	Organometallic substance, liquid, water-reactive, flammable	I, II, III
UN3401	Alkali metal amalgam, solid	I
UN3402	Alkaline earth metal amalgams, solid	I
UN3403	Potassium, metal alloys, solid	I
UN3404	Potassium sodium alloys, solid	I
UN3476	Fuel cell cartridges or Fuel cell cartridges contained in equipment or Fuel cell cartridges packed with equipment, containing water-reactive substances	—
UN3482	Alkali metal dispersions, flammable or Alkaline earth metal dispersions, flammable	I
UN3543	Articles containing a substance which in contact with water emits flammable gases, n.o.s.	—

Explore other hazard classes

3Flammable Liquid 7Radioactive Material 8Corrosive Material 9Miscellaneous Hazardous Material 1.1Mass Explosion Hazard 1.2Projection Hazard 1.3Fire Hazard 1.4Minor Explosion Hazard 1.5Very Insensitive Explosives 1.6Extremely Insensitive Articles 2.1Flammable Gas 2.2Non-Flammable, Non-Poisonous Gas 2.3Gas Poisonous by Inhalation 4.1Flammable Solid 4.2Spontaneously Combustible Material 5.1Oxidizer 5.2Organic Peroxide 6.1Poisonous (Toxic) Material 6.2Infectious Substance

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