Special Provision W31 — 49 CFR 172.102 (W-Codes)

Code	W31
Description	Non-bulk packagings must be hermetically sealed.
HazMat with this Code	UN 3317 - 2-Amino-4,6-Dinitrophenol, wetted with not less than 20 percent water by mass UN 3376 - 4-Nitrophenylhydrazine, with not less than 30 percent water, by mass UN 2785 - 4-Thiapentanal UN 2940 - 9-Phosphabicyclononanes or Cyclooctadiene phosphines UN 3206 - Alkali metal alcoholates, self-heating, corrosive, n.o.s. UN 1421 - Alkali metal alloys, liquid, n.o.s UN 1389 - Alkali metal amalgam, liquid UN 3401 - Alkali metal amalgam, solid UN 1390 - Alkali metal amides UN 3482 - Alkali metal dispersions, flammable or Alkaline earth metal dispersions, flammable UN 1391 - Alkali metal dispersions, or Alkaline earth metal dispersions UN 3205 - Alkaline earth metal alcoholates, n.o.s UN 1393 - Alkaline earth metal alloys, n.o.s UN 1392 - Alkaline earth metal amalgams, liquid UN 3402 - Alkaline earth metal amalgams, solid UN 1394 - Aluminum carbide UN 1395 - Aluminum ferrosilicon powder UN 2463 - Aluminum hydride UN 1397 - Aluminum phosphide UN 3048 - Aluminum phosphide pesticides UN 1396 - Aluminum powder, uncoated UN 1398 - Aluminum silicon powder, uncoated UN 3170 - Aluminum smelting by-products or Aluminum remelting by-products UN 1310 - Ammonium picrate, wetted with not less than 10 percent water, by mass UN 1553 - Arsenic acid, liquid UN 1400 - Barium UN 1854 - Barium alloys, pyrophoric UN 1571 - Barium azide, wetted with not less than 50 percent water, by mass UN 1565 - Barium cyanide UN 2604 - Boron trifluoride diethyl etherate UN 2965 - Boron trifluoride dimethyl etherate UN 1694 - Bromobenzyl cyanides, liquid UN 3449 - Bromobenzyl cyanides, solid UN 1401 - Calcium UN 1402 - Calcium carbide UN 1403 - Calcium cyanamide with more than 0.1 percent of calcium carbide UN 1575 - Calcium cyanide UN 1923 - Calcium dithionite or Calcium hydrosulfite UN 1404 - Calcium hydride UN 2844 - Calcium manganese silicon UN 1360 - Calcium phosphide UN 1405 - Calcium silicide UN 1855 - Calcium, pyrophoric or Calcium alloys, pyrophoric UN 1131 - Carbon disulfide UN 1362 - Carbon, activated UN 3078 - Cerium, turnings or gritty powder UN 1407 - Cesium or Caesium UN 2626 - Chloric acid aqueous solution, with not more than 10 percent chloric acid UN 2988 - Chlorosilanes, water-reactive, flammable, corrosive, n.o.s UN 1463 - Chromium trioxide, anhydrous UN 1889 - Cyanogen bromide UN 1868 - Decaborane UN 1320 - Dinitrophenol, wetted with not less than 15 percent water, by mass UN 1321 - Dinitrophenolates, wetted with not less than 15 percent water, by mass UN 1322 - Dinitroresorcinol, wetted with not less than 15 percent water, by mass UN 1698 - Diphenylamine chloroarsine UN 1699 - Diphenylchloroarsine, liquid UN 3450 - Diphenylchloroarsine, solid UN 2852 - Dipicryl sulfide, wetted with not less than 10 percent water, by mass UN 1183 - Ethyldichlorosilane UN 1373 - Fibers or Fabrics, animal or vegetable or Synthetic, n.o.s. with animal or vegetable oil UN 1374 - Fish meal, unstablized or Fish scrap, unstabilized UN 2545 - Hafnium powder, dry UN 1326 - Hafnium 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 UN 2478 - Isocyanates, flammable, toxic, n.o.s. or Isocyanate solutions, flammable, toxic, n.o.s. flash point less than 23 degrees C UN 1415 - Lithium UN 1410 - Lithium aluminum hydride UN 1413 - Lithium borohydride UN 2830 - Lithium ferrosilicon UN 1414 - Lithium hydride UN 2805 - Lithium hydride, fused solid UN 2806 - Lithium nitride UN 1417 - Lithium silicon UN 1419 - Magnesium aluminum phosphide UN 2004 - Magnesium diamide UN 2010 - Magnesium hydride UN 2011 - Magnesium phosphide UN 2624 - Magnesium silicide UN 1418 - Magnesium, powder or Magnesium alloys, powder UN 1626 - Mercuric potassium cyanide UN 2881 - Metal catalyst, dry UN 1378 - Metal catalyst, wetted with a visible excess of liquid UN 3182 - Metal hydrides, flammable, n.o.s UN 1409 - Metal hydrides, water reactive, n.o.s UN 3189 - Metal powder, self-heating, n.o.s UN 3181 - Metal salts of organic compounds, flammable, n.o.s UN 3208 - Metallic substance, water-reactive, n.o.s UN 3209 - Metallic substance, water-reactive, self-heating, n.o.s UN 1242 - Methyldichlorosilane UN 2556 - Nitrocellulose with alcohol with not less than 25 percent alcohol by mass, and with not more than 12.6 percent nitrogen, by dry mass UN 2555 - Nitrocellulose with water with not less than 25 percent water, by mass UN 2557 - Nitrocellulose, with not more than 12.6 percent nitrogen, by dry mass mixture with or without plasticizer, with or without pigment UN 1336 - Nitroguanidine, wetted or Picrite, wetted with not less than 20 percent water, by mass UN 1337 - Nitrostarch, wetted with not less than 20 percent water, by mass UN 3398 - Organometallic substance, liquid, water-reactive UN 3399 - Organometallic substance, liquid, water-reactive, flammable UN 3395 - Organometallic substance, solid, water-reactive UN 3396 - Organometallic substance, solid, water-reactive, flammable UN 3397 - Organometallic substance, solid, water-reactive, self-heating UN 2471 - Osmium tetroxide UN 1379 - Paper, unsaturated oil treated incompletely dried (including carbon paper) UN 1339 - Phosphorus heptasulfide, free from yellow or white phosphorus UN 1340 - Phosphorus pentasulfide, free from yellow or white phosphorus UN 1341 - Phosphorus sesquisulfide, free from yellow or white phosphorus UN 1343 - Phosphorus trisulfide, free from yellow or white phosphorus UN 1381 - Phosphorus, white dry or Phosphorus, white, under water or Phosphorus white, in solution or Phosphorus, yellow dry or Phosphorus, yellow, under water or Phosphorus, yellow, in solution UN 2257 - Potassium UN 1870 - Potassium borohydride UN 3413 - Potassium cyanide solution UN 1680 - Potassium cyanide, solid UN 1929 - Potassium dithionite or Potassium hydrosulfite UN 2012 - Potassium phosphide UN 1422 - Potassium sodium alloys, liquid UN 3404 - Potassium sodium alloys, solid UN 1382 - Potassium sulfide, anhydrous or Potassium sulfide with less than 30 percent water of crystallization UN 1420 - Potassium, metal alloys, liquid UN 3403 - Potassium, metal alloys, solid UN 2845 - Pyrophoric liquids, organic, n.o.s UN 1383 - Pyrophoric metals, n.o.s., or Pyrophoric alloys, n.o.s UN 3200 - Pyrophoric solid, inorganic, n.o.s UN 2846 - Pyrophoric solids, organic, n.o.s UN 1423 - Rubidium UN 3188 - Self-heating liquid, corrosive, inorganic, n.o.s UN 3185 - Self-heating liquid, corrosive, organic, n.o.s UN 3186 - Self-heating liquid, inorganic, n.o.s UN 3183 - Self-heating liquid, organic, n.o.s UN 3187 - Self-heating liquid, toxic, inorganic, n.o.s UN 3184 - Self-heating liquid, toxic, organic, n.o.s UN 3190 - Self-heating solid, inorganic, n.o.s UN 3088 - Self-heating solid, organic, n.o.s UN 1347 - Silver picrate, wetted with not less than 30 percent water, by mass UN 1428 - Sodium UN 2835 - Sodium aluminum hydride UN 1426 - Sodium borohydride UN 3414 - Sodium cyanide solution UN 1689 - Sodium cyanide, solid UN 3369 - Sodium dinitro-o-cresolate, wetted with not less than 10% water, by mass UN 1348 - Sodium dinitro-o-cresolate, wetted with not less than 15 percent water, by mass UN 1384 - Sodium dithionite or Sodium hydrosulfite UN 1427 - Sodium hydride UN 2318 - Sodium hydrosulfide, with less than 25 percent water of crystallization UN 1431 - Sodium methylate UN 1432 - Sodium phosphide UN 1349 - Sodium picramate, wetted with not less than 20 percent water, by mass UN 1385 - Sodium sulfide, anhydrous or Sodium sulfide with less than 30 percent water of crystallization UN 1433 - Stannic phosphide UN 2013 - Strontium phosphide UN 3448 - Tear gas substance, solid, n.o.s UN 1693 - Tear gas substances, liquid, n.o.s UN 3341 - Thiourea dioxide UN 3174 - Titanium disulphide UN 1871 - Titanium hydride UN 2546 - Titanium powder, dry UN 1352 - Titanium 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 UN 2441 - Titanium trichloride, pyrophoric or Titanium trichloride mixtures, pyrophoric UN 1295 - Trichlorosilane UN 1354 - Trinitrobenzene, wetted with not less than 30 percent water, by mass UN 3367 - Trinitrobenzene, wetted, with not less than 10% water, by mass UN 3368 - Trinitrobenzoic acid, wetted with not less than 10% water by mass UN 1355 - Trinitrobenzoic acid, wetted with not less than 30 percent water, by mass UN 3365 - Trinitrochlorobenzene (picryl chloride), wetted, with not less than 10% water by mass UN 3364 - Trinitrophenol (picric acid), wetted, with not less than 10 percent water by mass UN 1344 - Trinitrophenol, wetted with not less than 30 percent water, by mass UN 3366 - Trinitrotoluene (TNT), wetted, with not less than 10 percent water by mass UN 1356 - Trinitrotoluene, wetted or TNT, wetted, with not less than 30 percent water by mass UN 1357 - Urea nitrate, wetted with not less than 20 percent water, by mass UN 3370 - Urea nitrate, wetted, with not less than 10 percent water by mass UN 3148 - Water-reactive liquid, n.o.s. UN 3131 - Water-reactive solid, corrosive, n.o.s UN 3132 - Water-reactive solid, flammable, n.o.s. UN 2813 - Water-reactive solid, n.o.s UN 3135 - Water-reactive solid, self-heating, n.o.s. UN 3134 - Water-reactive solid, toxic, n.o.s UN 3342 - Xanthates UN 1701 - Xylyl bromide, liquid UN 1714 - Zinc phosphide UN 1436 - Zinc powder or Zinc dust UN 1437 - Zirconium hydride UN 1517 - Zirconium picramate, wetted with not less than 20 percent water, by mass UN 2008 - Zirconium powder, dry UN 1358 - Zirconium 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 UN 1932 - Zirconium scrap UN 2009 - Zirconium, dry, finished sheets, strip or coiled wire

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