| CAS/UN/NA-Number | Name | Hazard Class |
|---|
| UN 3268 | Safety devices, electrically initiated | 9 |
| UN 0503 | Safety devices, pyrotechnic | 1.4G |
| Safety fuse, see Fuse, safety | |
| UN 0190 | Samples, explosive, other than initiating explosives | |
| Sand acid, see Fluorosilicic acid | |
| UN 1386 | Seed cake with more than 1.5 percent oil and not more than 11 percent moisture | 4.2 |
| UN 2217 | Seed cake with not more than 1.5 percent oil and not more than 11 percent moisture | 4.2 |
| UN 1386 | Seed 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 | 4.2 |
UN 2630
CAS 10102-18-8 | Selenates or Selenites | 6.1 |
UN 1905
CAS 7783-08-6 | Selenic acid | 8 |
UN 3440
CAS 13410-01-0 | Selenium compound, liquid, n.o.s | 6.1 |
UN 3283
CAS 10102-18-8 | Selenium compound, solid, n.o.s | 6.1 |
UN 2657
CAS 7488-56-4 | Selenium disulfide | 6.1 |
UN 2194
CAS 7783-79-1 | Selenium hexafluoride | 2.3 |
| Selenium nitride | Forbidden |
UN 2879
CAS 7791-23-3 | Selenium oxychloride | 8 |
| Self-defense spray, aerosol, see Aerosols, etc | |
| NA 3334 | Self-defense spray, non-pressurized | 9 |
| UN 3188 | Self-heating liquid, corrosive, inorganic, n.o.s | 4.2 |
| UN 3185 | Self-heating liquid, corrosive, organic, n.o.s | 4.2 |
| UN 3186 | Self-heating liquid, inorganic, n.o.s | 4.2 |
| UN 3183 | Self-heating liquid, organic, n.o.s | 4.2 |
| UN 3187 | Self-heating liquid, toxic, inorganic, n.o.s | 4.2 |
| UN 3184 | Self-heating liquid, toxic, organic, n.o.s | 4.2 |
| UN 3192 | Self-heating solid, corrosive, inorganic, n.o.s. | 4.2 |
| UN 3126 | Self-heating solid, corrosive, organic, n.o.s | 4.2 |
| UN 3190 | Self-heating solid, inorganic, n.o.s | 4.2 |
| UN 3088 | Self-heating solid, organic, n.o.s | 4.2 |
| UN 3127 | Self-heating solid, oxidizing, n.o.s. | 4.2 |
| UN 3191 | Self-heating solid, toxic, inorganic, n.o.s. | 4.2 |
| UN 3128 | Self-heating solid, toxic, organic, n.o.s | 4.2 |
| Self-propelled vehicle, see Engines or Batteries etc | |
| UN 3221 | Self-reactive liquid type B | 4.1 |
| UN 3231 | Self-reactive liquid type B, temperature controlled | 4.1 |
| UN 3223 | Self-reactive liquid type C | 4.1 |
| UN 3233 | Self-reactive liquid type C, temperature controlled | 4.1 |
| UN 3225 | Self-reactive liquid type D | 4.1 |
| UN 3235 | Self-reactive liquid type D, temperature controlled | 4.1 |
| UN 3227 | Self-reactive liquid type E | 4.1 |
| UN 3237 | Self-reactive liquid type E, temperature controlled | 4.1 |
| UN 3229 | Self-reactive liquid type F | 4.1 |
| UN 3239 | Self-reactive liquid type F, temperature controlled | 4.1 |
| UN 3222 | Self-reactive solid type B | 4.1 |
| UN 3232 | Self-reactive solid type B, temperature controlled | 4.1 |
| UN 3224 | Self-reactive solid type C | 4.1 |
| UN 3234 | Self-reactive solid type C, temperature controlled | 4.1 |
| UN 3226 | Self-reactive solid type D | 4.1 |
| UN 3236 | Self-reactive solid type D, temperature controlled | 4.1 |
| UN 3228 | Self-reactive solid type E | 4.1 |
| UN 3238 | Self-reactive solid type E, temperature controlled | 4.1 |
| UN 3230 | Self-reactive solid type F | 4.1 |
| UN 3240 | Self-reactive solid type F, temperature controlled | 4.1 |
| UN 1288 | Shale oil | 3 |
| Shaped charges, see Charges, shaped, etc | |
| UN 0373 | Signal devices, hand | 1.4S |
| UN 0505 | Signals, distress, ship | 1.4G |
| Signals, highway, see Signal devices, hand | |
| UN 0192 | Signals, railway track, explosive | 1.1G |
| Signals, ship distress, water-activated, see Contrivances, water-activated, etc | |
| UN 0196 | Signals, smoke | 1.1G |
| UN 2203 | Silane | 2.1 |
| Silicofluoric acid, see Fluorosilicic acid | |
| Silicon chloride, see Silicon tetrachloride | |
UN 1346
CAS 1344-09-8 | Silicon powder, amorphous | 4.1 |
UN 1818
CAS 10026-04-7 | Silicon tetrachloride | 8 |
UN 1859
CAS 7783-61-1 | Silicon tetrafluoride | 2.3 |
| UN 3521 | Silicon tetrafluoride, adsorbed | 2.3 |
| Silver acetylide (dry) | Forbidden |
| UN 1683 | Silver arsenite | 6.1 |
| Silver azide (dry) | Forbidden |
| Silver chlorite (dry) | Forbidden |
UN 1684
CAS 506-64-9 | Silver cyanide | 6.1 |
| Silver fulminate (dry) | Forbidden |
| UN 1493 | Silver nitrate | 5.1 |
| Silver oxalate (dry) | Forbidden |
| Silver picrate (dry) | Forbidden |
| UN 1347 | Silver picrate, wetted with not less than 30 percent water, by mass | 4.1 |
| UN 1906 | Sludge, acid | 8 |
| NA 3178 | Smokeless powder for small arms (100 pounds or less) | 4.1 |
| UN 1907 | Soda lime with more than 4 percent sodium hydroxide | 8 |
UN 1428
CAS 7440-23-5 | Sodium | 4.3 |
UN 2812
CAS 1302-42-7 | Sodium aluminate, solid | 8 |
UN 1819
CAS 1302-42-7 | Sodium aluminate, solution | 8 |
UN 2835
CAS 13770-96-2 | Sodium aluminum hydride | 4.3 |
| UN 2863 | Sodium ammonium vanadate | 6.1 |
| UN 2473 | Sodium arsanilate | 6.1 |
UN 1685
CAS 7778-43-0 | Sodium arsenate | 6.1 |
UN 1686
CAS 7784-46-5 | Sodium arsenite, aqueous solutions | 6.1 |
UN 2027
CAS 7784-46-5 | Sodium arsenite, solid | 6.1 |
UN 1687
CAS 26628-22-8 | Sodium azide | 6.1 |
| Sodium bifluoride, see Sodium hydrogendifluoride | |
| Sodium bisulfite, solution, see Bisulfites, aqueous solutions, n.o.s. | |
UN 1426
CAS 16940-66-2 | Sodium borohydride | 4.3 |
| UN 3320 | Sodium borohydride and sodium hydroxide solution, with not more than 12 percent sodium borohydride and not more than 40 percent sodium hydroxide by mass | 8 |
| UN 1494 | Sodium bromate | 5.1 |
UN 1688
CAS 124-65-2 | Sodium cacodylate | 6.1 |
| UN 3378 | Sodium carbonate peroxyhydrate | 5.1 |
UN 1495
CAS 7775-09-9 | Sodium chlorate | 5.1 |
| Sodium chlorate mixed with dinitrotoluene, see Explosive blasting, type C | |
UN 2428
CAS 7775-09-9 | Sodium chlorate, aqueous solution | 5.1 |
UN 1496
CAS 7758-19-2 | Sodium chlorite | 5.1 |
| UN 2659 | Sodium chloroacetate | 6.1 |
| UN 2316 | Sodium cuprocyanide, solid | 6.1 |
| UN 2317 | Sodium cuprocyanide, solution | 6.1 |
UN 3414
CAS 143-33-9 | Sodium cyanide solution | 6.1 |
UN 1689
CAS 143-33-9 | Sodium cyanide, solid | 6.1 |
| Sodium dichloroisocyanurate or Sodium dichloro-s-triazinetrione, see Dichloroisocyanuric acid etc | |
| UN 0234 | Sodium dinitro-o-cresolate, dry or wetted with less than 15 percent water, by mass | 1.3C |
| UN 3369 | Sodium dinitro-o-cresolate, wetted with not less than 10% water, by mass | 4.1 |
| UN 1348 | Sodium dinitro-o-cresolate, wetted with not less than 15 percent water, by mass | 4.1 |
UN 1384
CAS 7775-14-6 | Sodium dithionite or Sodium hydrosulfite | 4.2 |
| UN 3415 | Sodium fluoride solution | 6.1 |
UN 1690
CAS 7681-49-4 | Sodium fluoride, solid | 6.1 |
UN 2629
CAS 62-74-8 | Sodium fluoroacetate | 6.1 |
UN 2674
CAS 16893-85-9 | Sodium fluorosilicate | 6.1 |
| Sodium hydrate, see Sodium hydroxide, solid | |
UN 1427
CAS 7646-69-7 | Sodium hydride | 4.3 |
UN 2439
CAS 1333-83-1 | Sodium hydrogendifluoride | 8 |
UN 2949
CAS 16721-80-5 | Sodium hydrosulfide with not less than 25 percent water of crystallization | 8 |
UN 2318
CAS 16721-80-5 | Sodium hydrosulfide, with less than 25 percent water of crystallization | 4.2 |
| Sodium hydrosulfite, see Sodium dithionite | |
UN 1824
CAS 1310-73-2 | Sodium hydroxide solution | 8 |
UN 1823
CAS 1310-73-2 | Sodium hydroxide, solid | 8 |
| Sodium hypochlorite, solution, see Hypochlorite solutions etc | |
| Sodium metal, liquid alloy, see Alkali metal alloys, liquid, n.o.s. | |
UN 1431
CAS 124-41-4 | Sodium methylate | 4.2 |
UN 1289
CAS 124-41-4 | Sodium methylate solutions in alcohol | 3 |
| UN 1825 | Sodium monoxide | 8 |
UN 1498
CAS 7631-99-4 | Sodium nitrate | 5.1 |
| UN 1499 | Sodium nitrate and potassium nitrate mixtures | 5.1 |
UN 1500
CAS 7632-00-0 | Sodium nitrite | 5.1 |
UN 2567
CAS 131-52-2 | Sodium pentachlorophenate | 6.1 |
| UN 3377 | Sodium perborate monohydrate | 5.1 |
UN 1502
CAS 7601-89-0 | Sodium perchlorate | 5.1 |
UN 1503
CAS 10101-50-5 | Sodium permanganate | 5.1 |
| UN 1504 | Sodium peroxide | 5.1 |
| UN 3247 | Sodium peroxoborate, anhydrous | 5.1 |
| UN 1505 | Sodium persulfate | 5.1 |
| UN 1432 | Sodium phosphide | 4.3 |
| UN 0235 | Sodium picramate, dry or wetted with less than 20 percent water, by mass | 1.3C |
| UN 1349 | Sodium picramate, wetted with not less than 20 percent water, by mass | 4.1 |
| Sodium picryl peroxide | Forbidden |
| Sodium potassium alloys, see Potassium sodium alloys | |
| Sodium selenate, see Selenates or Selenites | |
UN 1385
CAS 1313-82-2 | Sodium sulfide, anhydrous or Sodium sulfide with less than 30 percent water of crystallization | 4.2 |
UN 1849
CAS 1313-82-2 | Sodium sulfide, hydrated with not less than 30 percent water | 8 |
| UN 2547 | Sodium superoxide | 5.1 |
| Sodium tetranitride | Forbidden |
| UN 3244 | Solids containing corrosive liquid, n.o.s. | 8 |
| UN 3175 | Solids containing flammable liquid, n.o.s. | 4.1 |
| UN 3243 | Solids containing toxic liquid, n.o.s. | 6.1 |
| UN 0204 | Sounding devices, explosive | 1.2F |
| Spirits of salt, see Hydrochloric acid | |
| Squibs, see Igniters etc | |
UN 2440
CAS 7646-78-8 | Stannic chloride pentahydrate | 8 |
UN 1827
CAS 7646-78-8 | Stannic chloride, anhydrous | 8 |
| UN 1433 | Stannic phosphide | 4.3 |
| Steel swarf, see Ferrous metal borings, etc | |
UN 2676
CAS 7803-52-3 | Stibine | 2.3 |
| Storage batteries, wet, see Batteries, wet etc | |
| UN 1691 | Strontium arsenite | 6.1 |
| UN 1506 | Strontium chlorate | 5.1 |
UN 1507
CAS 10042-76-9 | Strontium nitrate | 5.1 |
| UN 1508 | Strontium perchlorate | 5.1 |
| UN 1509 | Strontium peroxide | 5.1 |
UN 2013
CAS 12504-13-1 | Strontium phosphide | 4.3 |
UN 1692
CAS 57-24-9 | Strychnine or Strychnine salts | 6.1 |
| Styphnic acid, see Trinitroresorcinol, etc | |
| UN 2055 | Styrene monomer, stabilized | 3 |
| UN 0358 | Substances, explosive, n.o.s. | 1.2L |
| UN 0482 | Substances, explosive, very insensitive, n.o.s. or Substances, EVI, n.o.s. | 1.5D |
UN 2780
CAS 485-31-4 | Substituted nitrophenol pesticides, liquid, flammable, toxic, flash point less than 23 degrees C | 3 |
UN 3014
CAS 485-31-4 | Substituted nitrophenol pesticides, liquid, toxic | 6.1 |
UN 3013
CAS 39300-45-3 | Substituted nitrophenol pesticides, liquid, toxic, flammable, flash point not less than 23 degrees C | 6.1 |
UN 2779
CAS 485-31-4 | Substituted nitrophenol pesticides, solid, toxic | 6.1 |
| Sucrose octanitrate (dry) | Forbidden |
UN 2967
CAS 5329-14-6 | Sulfamic acid | 8 |
| NA 1350 | Sulfur | 9 |
| Sulfur and chlorate, loose mixtures of | Forbidden |
UN 1828
CAS 10545-99-0 | Sulfur chlorides | 8 |
| Sulfur dichloride, see Sulfur chlorides | |
UN 1079
CAS 7446-09-5 | Sulfur dioxide | 2.3 |
| Sulfur dioxide solution, see Sulfurous acid | |
UN 1080
CAS 2551-62-4 | Sulfur hexafluoride | 2.2 |
UN 2418
CAS 7783-60-0 | Sulfur tetrafluoride | 2.3 |
UN 1829
CAS 7446-11-9 | Sulfur trioxide, stabilized | 8 |
| UN 2448 | Sulfur, molten | 4.1 |
| Sulfuretted hydrogen, see Hydrogen sulfide | |
UN 1830
CAS 7664-93-9 | Sulfuric acid with more than 51 percent acid | 8 |
UN 2796
CAS 7664-93-9 | Sulfuric acid with not more than 51% acid | 8 |
UN 1831
CAS 8014-95-7 | Sulfuric acid, fuming with 30 percent or more free sulfur trioxide | 8 |
UN 1831
CAS 8014-95-7 | Sulfuric acid, fuming with less than 30 percent free sulfur trioxide | 8 |
UN 1832
CAS 7664-93-9 | Sulfuric acid, spent | 8 |
| Sulfuric and hydrofluoric acid mixtures, see Hydrofluoric and sulfuric acid mixtures | |
| Sulfuric anhydride, see Sulfur trioxide, stabilized | |
| UN 1833 | Sulfurous acid | 8 |
UN 1834
CAS 7791-25-5 | Sulfuryl chloride | 6.1 |
UN 2191
CAS 2699-79-8 | Sulfuryl fluoride | 2.3 |