HAZARD CLASS 4
Flammable Solids & Reactive
Flammable solids, spontaneously combustible, and dangerous when wet
290 ENTRIES IN THIS CLASS
CLASS 4.1 — FLAMMABLE SOLID
UN1309Aluminum Powder, Coated
UN1310Ammonium Picrate, Wetted with Not Less Than 10 Percent Water, by Mass
UN1312Borneol
UN1313Calcium Resinate
UN1314Calcium Resinate, Fused
UN1318Cobalt Resinate, Precipitated
UN1320Dinitrophenol, Wetted with Not Less Than 15 Percent Water, by Mass
UN1321Dinitrophenolates, Wetted with Not Less Than 15 Percent Water, by Mass
UN1322Dinitroresorcinol, Wetted with Not Less Than 15 Percent Water, by Mass
UN1323Ferrocerium
UN1324Films, Nitrocellulose Base, Gelatine Coated (except Scrap)
UN1325Flammable Solid, Organic, n.o.s.
UN1326Hafnium Powder, Wetted with Not Less Than 25 Percent Water (a Visible Excess of Water Must Be Present) (a) Mechanically Produced, Particle Size Less Than 53 Microns; (b) Chemically Produced, Particle Size Less Than 840 Microns
UN1328Hexamethylenetetramine
UN1330Manganese Resinate
UN1331Matches, Strike Anywhere
UN1332Metaldehyde
UN1333Cerium, Slabs, Ingots, or Rods
UN1334Naphthalene, Crude or Refined
UN1336Nitroguanidine, Wetted or Picrite, Wetted with Not Less Than 20 Percent Water, by Mass
UN1337Nitrostarch, Wetted with Not Less Than 20 Percent Water, by Mass
UN1338Phosphorus, Amorphous
UN1341Phosphorus Sesquisulfide, Free From Yellow or White Phosphorus
UN1343Phosphorus Trisulfide, Free From Yellow or White Phosphorus
UN1344Trinitrophenol, Wetted with Not Less Than 30 Percent Water, by Mass
UN1345Rubber Scrap or Shoddy
UN1346Silicon Powder, Amorphous
UN1347Silver Picrate, Wetted with Not Less Than 30 Percent Water, by Mass
UN1348Sodium Dinitro-o-cresolate, Wetted with Not Less Than 15 Percent Water, by Mass
UN1349Sodium Picramate, Wetted with Not Less Than 20 Percent Water, by Mass
UN1350Sulfur
UN1352Titanium powder, wetted
UN1353Fibers or Fabrics Impregnated with Weakly Nitrated Nitrocellulose, n.o.s.
UN1354Trinitrobenzene, Wetted with Not Less Than 30 Percent Water, by Mass
UN1355Trinitrobenzoic Acid, Wetted with Not Less Than 30 Percent Water, by Mass
UN1356Trinitrotoluene, Wetted or TNT, Wetted, with Not Less Than 30 Percent Water by Mass
UN1357Urea Nitrate, Wetted with Not Less Than 20 Percent Water, by Mass
UN1437Zirconium Hydride
UN1517Zirconium Picramate, Wetted with Not Less Than 20 Percent Water, by Mass
UN1571Barium Azide, Wetted with Not Less Than 50 Percent Water, by Mass
UN1868Decaborane
UN1869Magnesium or Magnesium Alloys with More Than 50 Percent Magnesium in Pellets, Turnings or Ribbons
UN1871Titanium Hydride
UN1944Matches, Safety
UN1945Matches, Wax 'Vesta'
UN2000Celluloid, in blocks, rods, rolls, sheets, tubes
UN2001Cobalt Naphthenates, Powder
UN2002Celluloid, Scrap
UN2213Paraformaldehyde
UN2254Matches, Fusee
UN2304Naphthalene, Molten
UN2448Sulfur, Molten
UN2538Nitronaphthalene
UN2555Nitrocellulose with Water with Not Less Than 25 Percent Water, by Mass
UN2556Nitrocellulose with Alcohol with Not Less Than 25 Percent Alcohol by Mass, and with Not More Than 12.6 Percent Nitrogen, by Dry Mass
UN2557Nitrocellulose, with Not More Than 12.6 Percent Nitrogen, by Dry Mass Mixture with or Without Plasticizer, with or Without Pigment
UN2623Firelighters, Solid with Flammable Liquid
UN2687Dicyclohexylammonium Nitrite
UN2714Zinc Resinate
UN2715Aluminum Resinate
UN2717Camphor, Synthetic
UN2852Dipicryl Sulfide, Wetted with Not Less Than 10 Percent Water, by Mass
UN2858Zirconium, Dry, Coiled Wire, Finished Metal Sheets, Strip (thinner Than 254 Microns But Not Thinner Than 18 Microns)
UN2878Titanium Sponge Granules or Titanium Sponge Powders
UN2907Isosorbide Dinitrate Mixture with Not Less Than 60 Percent Lactose, Mannose, Starch or Calcium Hydrogen Phosphate
UN2925Flammable Solid, Corrosive, Organic, n.o.s.
UN2926Flammable Solids, Toxic, Organic, n.o.s.
UN29565-tert-Butyl-2,4,6-trinitro-m-xylene or Musk Xylene
UN2989Lead Phosphite, Dibasic
UN3089Metal Powder, Flammable, n.o.s.
UN3097Flammable Solid, Oxidizing, n.o.s.
UN3175Solids Containing Flammable Liquid, n.o.s.
UN3176Flammable Solid, Organic, Molten, n.o.s.
UN3178Flammable Solid, Inorganic, n.o.s.
UN3179Flammable Solid, Toxic, Inorganic, n.o.s.
UN3180Flammable Solid, Corrosive, Inorganic, n.o.s.
UN3181Metal Salts of Organic Compounds, Flammable, n.o.s.
UN3182Metal Hydrides, Flammable, n.o.s.
UN3221Self-reactive Liquid Type B
UN3222Self-reactive Solid Type B
UN3223Self-reactive Liquid Type C
UN3224Self-reactive Solid Type C
UN3225Self-reactive Liquid Type D
UN3226Self-reactive Solid Type D
UN3227Self-reactive Liquid Type E
UN3228Self-reactive Solid Type E
UN3229Self-reactive Liquid Type F
UN3230Self-reactive Solid Type F
UN3231Self-reactive Liquid Type B, Temperature Controlled
UN3232Self-reactive Solid Type B, Temperature Controlled
UN3233Self-reactive Liquid Type C, Temperature Controlled
UN3234Self-reactive Solid Type C, Temperature Controlled
UN3235Self-reactive Liquid Type D, Temperature Controlled
UN3236Self-reactive Solid Type D, Temperature Controlled
UN3237Self-reactive Liquid Type E, Temperature Controlled
UN3238Self-reactive Solid Type E, Temperature Controlled
UN3239Self-reactive Liquid Type F, Temperature Controlled
UN3240Self-reactive Solid Type F, Temperature Controlled
UN32412-Bromo-2-nitropropane-1,3-diol
UN3242Azodicarbonamide
UN3251Isosorbide-5-mononitrate
UN3270Nitrocellulose Membrane Filters, with Not More Than 12.6% Nitrogen, by Dry Mass
UN33172-Amino-4,6-Dinitrophenol, Wetted with Not Less Than 20 Percent Water by Mass
UN3319Nitroglycerin Mixture, Desensitized, Solid, n.o.s. with More Than 2 Percent But Not More Than 10 Percent Nitroglycerin, by Mass
UN3344Pentaerythrite Tetranitrate Mixture, Desensitized, Solid, n.o.s. or Pentaerythritol Tetranitrate Mixture, Desensitized, Solid, n.o.s. or PETN Mixture, Desensitized, Solid, n.o.s., with More Than 10 Percent But Not More Than 20 Percent PETN, by Mass
UN3360Fibers, Vegetable, Dry
UN3364Trinitrophenol (picric Acid), Wetted, with Not Less Than 10 Percent Water by Mass
UN3365Trinitrochlorobenzene (picryl Chloride), Wetted, with Not Less Than 10% Water by Mass
UN3366Trinitrotoluene (TNT), Wetted, with Not Less Than 10 Percent Water by Mass
UN3367Trinitrobenzene, Wetted, with Not Less Than 10% Water, by Mass
UN3368Trinitrobenzoic Acid, Wetted with Not Less Than 10% Water by Mass
UN3369Sodium Dinitro-o-cresolate, Wetted with Not Less Than 10% Water, by Mass
UN3370Urea Nitrate, Wetted, with Not Less Than 10 Percent Water by Mass
UN33764-Nitrophenylhydrazine, with Not Less Than 30 Percent Water, by Mass
UN3380Desensitized Explosive, Solid, n.o.s.
UN34741-Hydroxybenzotriazole, Monohydrate
UN3527Polyester Resin Kit, Solid Base Material
UN3531Polymerizing Substance, Solid, Stabilized, n.o.s.
UN3532Polymerizing Substance, Liquid, Stabilized, n.o.s.
UN3533Polymerizing Substance, Solid, Temperature Controlled, n.o.s.
UN3534Polymerizing Substance, Liquid, Temperature Controlled, n.o.s.
UN3541Articles Containing Flammable Solid, n.o.s.
CLASS 4.2 — SPONTANEOUSLY COMBUSTIBLE
UN1339Phosphorus, White or Yellow, Under Water
UN1358Zirconium, Dry
UN1361Carbon (Animal or Vegetable Origin)
UN1362Carbon, Activated
UN1363Copra
UN1364Cotton waste, oily
UN1365Cotton, Wet
UN1369p-Nitrosodimethylaniline
UN1372Fibers, Animal or Fibers, Vegetable Burnt, Wet or Damp
UN1373Fibers or Fabrics, Animal or Vegetable or Synthetic, n.o.s. with Animal or Vegetable Oil
UN1374Fish Meal, Unstablized or Fish Scrap, Unstabilized
UN1376Iron Oxide, Spent, or Iron Sponge, Spent Obtained From Coal Gas Purification
UN1378Metal Catalyst, Wetted
UN1379Paper, Unsaturated Oil Treated Incompletely Dried (including Carbon Paper)
UN1380Pentaborane
UN1381Phosphorus, White, Dry
UN1382Potassium Sulfide, Anhydrous or Potassium Sulfide with Less Than 30 Percent Water of Crystallization
UN1383Pyrophoric Metal, n.o.s.
UN1384Sodium Dithionite
UN1385Sodium Sulfide, Anhydrous or Sodium Sulfide with Less Than 30 Percent Water of Crystallization
UN1386Seed Cake, Containing Vegetable Oil Solvent Extractions and Expelled Seeds, with Not More Than 10 Percent of Oil and When the Amount of Moisture Is Higher Than 11 Percent, with Not More Than 20 Percent of Oil and Moisture Combined
UN1387Wool Waste, Wet
UN1431Sodium Methylate
UN1819Sodium Sulfide, Solid
UN1825Sodium Aluminum Hydride Dispersions
UN1854Barium Alloys, Pyrophoric
UN1855Calcium, Pyrophoric
UN1856Rags, Oily
UN1857Textile Waste, Wet
UN1923Calcium Dithionite or Calcium Hydrosulfite
UN1929Potassium Dithionite or Potassium Hydrosulfite
UN1932Zirconium Scrap
UN2004Magnesium Diamide
UN2006Plastics, Nitrocellulose-Based, Self-Heating
UN2008Zirconium Powder, Dry
UN2009Zirconium, Dry, Finished Sheets
UN2210Maneb or Maneb Preparations with Not Less Than 60 Percent Maneb
UN2217Seed Cake with Not More Than 1.5 Percent Oil and Not More Than 11 Percent Moisture
UN2318Sodium Hydrosulfide
UN2441Titanium Trichloride Mixture, Pyrophoric
UN2447Phosphorus, White, Molten
UN2545Hafnium Powder, Dry
UN2546Titanium Powder, Dry
UN2793Ferrous Metal Borings or Ferrous Metal Shavings or Ferrous Metal Turnings or Ferrous Metal Cuttings in A Form Liable To Self-heating
UN2845Pyrophoric Liquid, Organic, n.o.s.
UN2846Pyrophoric Solid, Organic, n.o.s.
UN2870Aluminum Borohydride or Aluminum Borohydride in Devices
UN2881Metal Catalyst, Dry
UN29409-Phosphabicyclononanes or Cyclooctadiene Phosphines
UN3088Self-Heating Solid, Organic, n.o.s.
UN3126Self-heating Solid, Corrosive, Organic, n.o.s.
UN3127Self-heating Solid, Oxidizing, n.o.s.
UN3128Self-heating Solid, Toxic, Organic, n.o.s.
UN3174Titanium Disulphide
UN3183Self-heating Liquid, Organic, n.o.s.
UN3184Self-heating Liquid, Toxic, Organic, n.o.s.
UN3185Self-heating Liquid, Corrosive, Organic, n.o.s.
UN3186Self-heating Liquid, Inorganic, n.o.s.
UN3187Self-heating Liquid, Toxic, Inorganic, n.o.s.
UN3188Self-heating Liquid, Corrosive, Inorganic, n.o.s.
UN3189Metal Powder, Self-heating, n.o.s.
UN3190Self-heating Solid, Inorganic, n.o.s.
UN3191Self-heating Solid, Toxic, Inorganic, n.o.s.
UN3192Self-heating Solid, Corrosive, Inorganic, n.o.s.
UN3194Pyrophoric Liquid, Inorganic, n.o.s.
UN3200Pyrophoric Solid, Inorganic, n.o.s.
UN3205Alkaline Earth Metal Alcoholates, n.o.s.
UN3206Alkali Metal Alcoholates, Self-heating, Corrosive, n.o.s.
UN3254Tributylphosphane
UN3255tert-Butyl Hypochlorite
UN3313Organic Pigments, Self-heating
UN3341Thiourea Dioxide
UN3342Xanthates
UN3391Organometallic Substance, Solid, Pyrophoric
UN3392Organometallic Substance, Liquid, Pyrophoric
UN3393Organometallic Substance, Solid, Pyrophoric, Water-reactive
UN3394Organometallic Substance, Liquid, Pyrophoric, Water-reactive
UN3400Organometallic Substance, Solid, Self-heating
UN3497Krill Meal
UN3542Articles Containing A Substance Liable To Spontaneous Combustion, n.o.s.
CLASS 4.3 — DANGEROUS WHEN WET
UN1183Ethyldichlorosilane
UN1242Methyldichlorosilane
UN1295Trichlorosilane
UN1340Phosphorus Pentasulfide
UN1360Calcium Phosphide
UN1389Alkali Metal Amalgam, Liquid
UN1390Alkali Metal Amides
UN1391Alkali Metal Dispersion
UN1392Alkaline Earth Metal Amalgams, Liquid
UN1393Alkaline earth metal alloys, n.o.s.
UN1394Aluminum Carbide
UN1395Aluminum Ferrosilicon Powder
UN1396Aluminum Powder, Uncoated
UN1397Aluminum Phosphide
UN1398Aluminum Powder, Uncoated
UN1400Barium
UN1401Calcium
UN1402Calcium Carbide
UN1403Calcium Cyanamide with More Than 0.1 Percent of Calcium Carbide
UN1404Calcium Hydride
UN1405Calcium Silicide
UN1407Cesium or Caesium
UN1408Ferrosilicon (30-90% Silicon)
UN1409Metal Hydrides, Water Reactive, n.o.s.
UN1410Lithium Aluminum Hydride
UN1411Lithium Aluminum Hydride, Ethereal
UN1413Lithium Borohydride
UN1414Lithium Hydride
UN1415Lithium
UN1417Lithium Silicon
UN1418Magnesium Powder
UN1419Magnesium Aluminum Phosphide
UN1420Potassium, Metal Alloys, Liquid
UN1421Alkali Metal Alloys, Liquid, n.o.s.
UN1422Potassium Sodium Alloys, Liquid
UN1423Rubidium
UN1426Sodium Borohydride
UN1427Sodium Hydride
UN1428Sodium (Metal)
UN1432Sodium Phosphide
UN1433Stannic Phosphide
UN1435Zinc Ashes
UN1436Zinc Powder or Dust
UN1714Zinc Phosphide
UN1870Potassium Borohydride
UN1928Methyl Magnesium Bromide, in Ethyl Ether
UN2010Magnesium Hydride
UN2011Magnesium Phosphide
UN2012Potassium Phosphide
UN2013Strontium Phosphide
UN2257Potassium
UN2463Aluminum Hydride
UN2624Magnesium Silicide
UN2805Lithium Hydride, Fused Solid
UN2806Lithium Nitride
UN2813Water-Reactive Solid, n.o.s.
UN2830Lithium Ferrosilicon
UN2835Sodium Aluminum Hydride
UN2844Calcium Manganese Silicon
UN2950Magnesium Granules, Coated, Particle Size Not Less Than 149 Microns
UN2965Boron trifluoride dimethyl etherate
UN2968Maneb Stabilized or Maneb Preparations, Stabilized Against Self-heating
UN2988Chlorosilanes, Water-reactive, Flammable, Corrosive, n.o.s.
UN3078Cerium, Turnings or Gritty Powder
UN3129Water-reactive Liquid, Corrosive, n.o.s.
UN3130Water-reactive Liquid, Toxic, n.o.s.
UN3131Water-reactive Solid, Corrosive, n.o.s.
UN3132Water-reactive Solid, Flammable, n.o.s.
UN3133Water-reactive, Solid, Oxidizing, n.o.s.
UN3134Water-reactive Solid, Toxic, n.o.s.
UN3135Water-reactive Solid, Self-heating, n.o.s.
UN3148Water-reactive Liquid, n.o.s.
UN3170Aluminum Smelting By-products or Aluminum Remelting By-products
UN3208Metallic Substance, Water-Reactive, n.o.s.
UN3209Metallic Substance, Water-reactive, Self-heating, n.o.s.
UN3292Batteries, Containing Sodium
UN3395Organometallic Substance, Solid, Water-reactive
UN3396Organometallic Substance, Solid, Water-reactive, Flammable
UN3397Organometallic Substance, Solid, Water-reactive, Self-heating
UN3398Organometallic Substance, Liquid, Water-reactive
UN3399Organometallic Substance, Liquid, Water-reactive, Flammable
UN3401Alkali Metal Amalgam, Solid
UN3402Alkaline Earth Metal Amalgams, Solid
UN3403Potassium, Metal Alloys, Solid
UN3404Potassium Sodium Alloys, Solid
UN3476Fuel Cell Cartridges or Fuel Cell Cartridges Contained in Equipment or Fuel Cell Cartridges Packed with Equipment, Containing Water-reactive Substances
UN3482Alkali Metal Dispersions, Flammable or Alkaline Earth Metal Dispersions, Flammable
UN3543Articles Containing A Substance Which in Contact with Water Emits Flammable Gases, n.o.s.
UNLookup is a reference utility. Verify all shipments against current editions of 49 CFR, the IATA DGR, the IMDG Code, or the ERG applicable to your mode of transport. Regulations change; this page is updated periodically and may not reflect the most recent amendments.