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Hazard Classes
Overview
Class 1 – Explosives
Class 2 – Gases
Class 3 – Flammable Liquids
Class 4 – Other Flammable Substances
Class 5 – Oxidizing Substances & Organic Peroxides
Class 6 – Toxic Substances
Class 7 – Radioactive Materials
Class 8 – Corrosive Substances
Class 9 – Miscellaneous Hazardous Substances
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Class 1 – Explosives
Class 2 – Gases
Class 3 – Flammable Liquids
Class 4 – Other Flammable Substances
Class 5 – Oxidizing Substances & Organic Peroxides
Class 6 – Toxic & Infectious Substances
Class 7 – Radioactive Materials
Class 8 – Corrosive Substances
Class 9 – Miscellaneous Hazardous Substances
Dangerous
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Special Provisions
HazMat Tool
49 CFR 172.102 Special Provisions
T-Codes
T3
Special Provision T3 — 49 CFR 172.102 (T-Codes)
Code
T3
Description
Minimum test pressure (bar)
2.65
Minimum shell thickness
§ 178.274(d)(2)
Pressure-relief requirements
Normal
Bottom opening requirements
§ 178.275(d)(2)
HazMat with this Code
UN 2649 - 1,3-Dichloroacetone
UN 2673 - 2-Amino-4-chlorophenol
UN 3428 - 3-Chloro-4-methylphenyl isocyanate, solid
UN 2940 - 9-Phosphabicyclononanes or Cyclooctadiene phosphines
UN 2205 - Adiponitrile
UN 3206 - Alkali metal alcoholates, self-heating, corrosive, n.o.s.
UN 1390 - Alkali metal amides
UN 3205 - Alkaline earth metal alcoholates, n.o.s
UN 1393 - Alkaline earth metal alloys, n.o.s
UN 1544 - Alkaloids, solid, n.o.s. or Alkaloid salts, solid, n.o.s. poisonous
UN 2583 - Alkyl sulfonic acids, solid or Aryl sulfonic acids, solid, with more than 5 percent free sulfuric acid
UN 2430 - Alkylphenols, solid, n.o.s. (including C2-C12 homologues)
UN 1725 - Aluminum bromide, anhydrous
UN 1394 - Aluminum carbide
UN 1726 - Aluminum chloride, anhydrous
UN 1395 - Aluminum ferrosilicon powder
UN 1309 - Aluminum powder, coated
UN 1396 - Aluminum powder, uncoated
UN 3170 - Aluminum smelting by-products or Aluminum remelting by-products
UN 3259 - Amines, solid, corrosive, n.o.s., or Polyamines, solid, corrosive n.o.s.
UN 2671 - Aminopyridines (o-; m-; p-)
UN 1546 - Ammonium arsenate
UN 1439 - Ammonium dichromate
UN 1843 - Ammonium dinitro-o-cresolate, solid
UN 2506 - Ammonium hydrogen sulfate
UN 1727 - Ammonium hydrogendifluoride, solid
UN 2859 - Ammonium metavanadate
UN 1442 - Ammonium perchlorate
UN 2861 - Ammonium polyvanadate
UN 1729 - Anisoyl chloride
UN 1733 - Antimony trichloride, solid
UN 1558 - Arsenic
UN 1554 - Arsenic acid, solid
UN 1555 - Arsenic bromide
UN 1557 - Arsenic compounds, solid, n.o.s. inorganic, including arsenates, n.o.s.; arsenites, n.o.s.; arsenic sulfides, n.o.s.; and organic compounds of arsenic, n.o.s
UN 1559 - Arsenic pentoxide
UN 1561 - Arsenic trioxide
UN 1562 - Arsenical dust
UN 2759 - Arsenical pesticides, solid, toxic
UN 2212 - Asbestos, amphibole amosite, tremolite, actinolite, anthophyllite, or crocidolite
UN 3242 - Azodicarbonamide
UN 1400 - Barium
UN 2719 - Barium bromate
UN 1445 - Barium chlorate, solid
UN 1564 - Barium compounds, n.o.s
UN 2741 - Barium hypochlorite with more than 22 percent available chlorine
UN 1446 - Barium nitrate
UN 1447 - Barium perchlorate, solid
UN 1448 - Barium permanganate
UN 1449 - Barium peroxide
UN 1885 - Benzidine
UN 2587 - Benzoquinone
UN 1566 - Beryllium compounds, n.o.s
UN 2464 - Beryllium nitrate
UN 1567 - Beryllium, powder
UN 1650 - beta-Naphthylamine, solid
UN 2781 - Bipyridilium pesticides, solid, toxic
UN 3419 - Boron trifluoride acetic acid complex, solid
UN 3420 - Boron trifluoride propionic acid complex, solid
UN 1450 - Bromates, inorganic, n.o.s
UN 3425 - Bromoacetic acid, solid
UN 1572 - Cacodylic acid
UN 2570 - Cadmium compounds
UN 2682 - Caesium hydroxide
UN 1401 - Calcium
UN 1573 - Calcium arsenate
UN 1574 - Calcium arsenate and calcium arsenite, mixtures, solid
UN 1402 - Calcium carbide
UN 1452 - Calcium chlorate
UN 1453 - Calcium chlorite
UN 1923 - Calcium dithionite or Calcium hydrosulfite
UN 1455 - Calcium perchlorate
UN 1456 - Calcium permanganate
UN 1457 - Calcium peroxide
UN 1405 - Calcium silicide
UN 2757 - Carbamate pesticides, solid, toxic
UN 1361 - Carbon, animal or vegetable origin
UN 2969 - Castor beans or Castor meal or Castor pomace or Castor flake
UN 3078 - Cerium, turnings or gritty powder
UN 1458 - Chlorate and borate mixtures
UN 1459 - Chlorate and magnesium chloride mixture solid
UN 1461 - Chlorates, inorganic, n.o.s
UN 1462 - Chlorites, inorganic, n.o.s
UN 1751 - Chloroacetic acid, solid
UN 1697 - Chloroacetophenone, solid, (CN)
UN 2018 - Chloroanilines, solid
UN 3437 - Chlorocresols, solid
UN 3441 - Chlorodinitrobenzenes, solid
UN 1578 - Chloronitrobenzenes, solid
UN 1756 - Chromic fluoride, solid
UN 1463 - Chromium trioxide, anhydrous
UN 1585 - Copper acetoarsenite
UN 1586 - Copper arsenite
UN 2775 - Copper based pesticides, solid, toxic
UN 2721 - Copper chlorate
UN 1587 - Copper cyanide
UN 3260 - Corrosive solid, acidic, inorganic, n.o.s
UN 3261 - Corrosive solid, acidic, organic, n.o.s
UN 3262 - Corrosive solid, basic, inorganic, n.o.s.
UN 3263 - Corrosive solid, basic, organic, n.o.s.
UN 2921 - Corrosive solids, flammable, n.o.s.
UN 1759 - Corrosive solids, n.o.s.
UN 3084 - Corrosive solids, oxidizing, n.o.s.
UN 3095 - Corrosive solids, self-heating, n.o.s
UN 2923 - Corrosive solids, toxic, n.o.s.
UN 3096 - Corrosive solids, water-reactive, n.o.s
UN 3027 - Coumarin derivative pesticides, solid, toxic
UN 3455 - Cresols, solid
UN 1588 - Cyanides, inorganic, solid, n.o.s.
UN 2670 - Cyanuric chloride
UN 1868 - Decaborane
UN 3442 - Dichloroanilines, solid
UN 2465 - Dichloroisocyanuric acid, dry or Dichloroisocyanuric acid salts
UN 2250 - Dichlorophenyl isocyanates
UN 1598 - Dinitro-o-cresol
UN 1596 - Dinitroanilines
UN 3443 - Dinitrobenzenes, solid
UN 3454 - Dinitrotoluenes, solid
UN 1770 - Diphenylmethyl bromide
UN 1601 - Disinfectants, solid, toxic, n.o.s.
UN 3147 - Dyes, solid, corrosive, n.o.s. or Dye intermediates, solid, corrosive, n.o.s.
UN 3143 - Dyes, solid, toxic, n.o.s. or Dye intermediates, solid, toxic, n.o.s.
UN 3256 - Elevated temperature liquid, flammable, n.o.s., with flash point above 37.8 C, at or above its flash point
UN 3257 - Elevated temperature liquid, n.o.s., at or above 100 C and below its flash point (including molten metals, molten salts, etc.)
UN 1606 - Ferric arsenate
UN 1607 - Ferric arsenite
UN 1323 - Ferrocerium
UN 1608 - Ferrous arsenate
NA1759 - Ferrous chloride, solid
UN 1374 - Fish meal, unstablized or Fish scrap, unstabilized
UN 3180 - Flammable solid, corrosive, inorganic, n.o.s.
UN 3178 - Flammable solid, inorganic, n.o.s.
UN 3176 - Flammable solid, organic, molten, n.o.s.
UN 3179 - Flammable solid, toxic, inorganic, n.o.s.
UN 2925 - Flammable solids, corrosive, organic, n.o.s.
UN 1325 - Flammable solids, organic, n.o.s.
UN 2926 - Flammable solids, toxic, organic, n.o.s.
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 3436 - Hexafluoroacetone hydrate, solid
UN 1740 - Hydrogendifluoride, solid, n.o.s.
UN 3212 - Hypochlorites, inorganic, n.o.s
UN 3497 - Krill meal
UN 1617 - Lead arsenates
UN 1618 - Lead arsenites
UN 1620 - Lead cyanide
UN 1469 - Lead nitrate
UN 1470 - Lead perchlorate, solid
UN 2989 - Lead phosphite, dibasic
UN 1794 - Lead sulfate with more than 3 percent free acid
UN 2830 - Lithium ferrosilicon
UN 2805 - Lithium hydride, fused solid
UN 2680 - Lithium hydroxide
UN 1471 - Lithium hypochlorite, dry or Lithium hypochlorite mixture
UN 1472 - Lithium peroxide
UN 1417 - Lithium silicon
UN 1621 - London purple
UN 1622 - Magnesium arsenate
UN 1473 - Magnesium bromate
UN 2723 - Magnesium chlorate
UN 2004 - Magnesium diamide
UN 1475 - Magnesium perchlorate
UN 1476 - Magnesium peroxide
UN 2624 - Magnesium silicide
UN 1418 - Magnesium, powder or Magnesium alloys, powder
UN 2647 - Malononitrile
UN 3249 - Medicine, solid, toxic, n.o.s
UN 1623 - Mercuric arsenate
UN 1624 - Mercuric chloride
UN 1625 - Mercuric nitrate
UN 1627 - Mercurous nitrate
UN 1629 - Mercury acetate
UN 1630 - Mercury ammonium chloride
UN 2777 - Mercury based pesticides, solid, toxic
UN 1631 - Mercury benzoate
UN 1634 - Mercury bromides
UN 2025 - Mercury compound, solid, n.o.s
UN 1636 - Mercury cyanide
UN 1637 - Mercury gluconate
UN 1638 - Mercury iodide
UN 1639 - Mercury nucleate
UN 1640 - Mercury oleate
UN 1641 - Mercury oxide
UN 1642 - Mercury oxycyanide, desensitized
UN 1643 - Mercury potassium iodide
UN 1644 - Mercury salicylate
UN 1645 - Mercury sulfates
UN 1646 - Mercury thiocyanate
UN 3466 - Metal carbonyls, solid, n.o.s.
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 3089 - Metal powders, flammable, 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 1651 - Naphthylthiourea
UN 1652 - Naphthylurea
UN 1653 - Nickel cyanide
UN 1655 - Nicotine compounds, solid, n.o.s. or Nicotine preparations, solid, n.o.s.
UN 3444 - Nicotine hydrochloride, solid
UN 1657 - Nicotine salicylate
UN 3445 - Nicotine sulphate, solid
UN 1659 - Nicotine tartrate
UN 1477 - Nitrates, inorganic, n.o.s.
UN 3439 - Nitriles, solid, toxic, n.o.s.
UN 2627 - Nitrites, inorganic, n.o.s.
UN 1661 - Nitroanilines (o-; m-; p-;)
UN 2305 - Nitrobenzenesulfonic acid
UN 3431 - Nitrobenzotrifluorides, solid
UN 3456 - Nitrosylsulphuric acid, solid
UN 3446 - Nitrotoluenes, solid
UN 3447 - Nitroxylenes, solid
UN 3313 - Organic pigments, self-heating
UN 3465 - Organoarsenic compound, solid, n.o.s.
UN 2761 - Organochlorine pesticides, solid, toxic
UN 3467 - Organometallic compound, solid, toxic, n.o.s
UN 3400 - Organometallic substance, solid, self-heating
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 3464 - Organophosphorus compound, solid, toxic, n.o.s
UN 2783 - Organophosphorus pesticides, solid, toxic
UN 3146 - Organotin compounds, solid, n.o.s.
UN 2786 - Organotin pesticides, solid, toxic
UN 3085 - Oxidizing solid, corrosive, n.o.s
UN 1479 - Oxidizing solid, n.o.s.
UN 3087 - Oxidizing solid, toxic, n.o.s.
UN 1369 - p-Nitrosodimethylaniline
UN 3155 - Pentachlorophenol
UN 1481 - Perchlorates, inorganic, n.o.s.
UN 1482 - Permanganates, inorganic, n.o.s
UN 1483 - Peroxides, inorganic, n.o.s
UN 2588 - Pesticides, solid, toxic, n.o.s.
UN 2645 - Phenacyl bromide
UN 1671 - Phenol, solid
UN 3345 - Phenoxyacetic acid derivative pesticide, solid, toxic
UN 1674 - Phenylmercuric acetate
UN 2026 - Phenylmercuric compounds, n.o.s.
UN 1894 - Phenylmercuric hydroxide
UN 1895 - Phenylmercuric nitrate
UN 1339 - Phosphorus heptasulfide, free from yellow or white phosphorus
UN 1939 - Phosphorus oxybromide
UN 2691 - Phosphorus pentabromide
UN 1806 - Phosphorus pentachloride
UN 1340 - Phosphorus pentasulfide, free from yellow or white phosphorus
UN 1807 - Phosphorus pentoxide
UN 1341 - Phosphorus sesquisulfide, free from yellow or white phosphorus
UN 1343 - Phosphorus trisulfide, free from yellow or white phosphorus
UN 3432 - Polychlorinated biphenyls, solid
UN 3152 - Polyhalogenated biphenyls, solid or Halogenated monomethyldiphenyl-methanes, solid or Polyhalogenated terphenyls, solid
UN 1677 - Potassium arsenate
UN 1678 - Potassium arsenite
UN 1484 - Potassium bromate
UN 1485 - Potassium chlorate
UN 1679 - Potassium cuprocyanide
UN 1929 - Potassium dithionite or Potassium hydrosulfite
UN 2509 - Potassium hydrogen sulfate
UN 1811 - Potassium hydrogendifluoride solid
UN 1813 - Potassium hydroxide, solid
UN 2864 - Potassium metavanadate
UN 2033 - Potassium monoxide
UN 1487 - Potassium nitrate and sodium nitrite mixtures
UN 1488 - Potassium nitrite
UN 1489 - Potassium perchlorate
UN 1490 - Potassium permanganate
UN 1382 - Potassium sulfide, anhydrous or Potassium sulfide with less than 30 percent water of crystallization
UN 1847 - Potassium sulfide, hydrated with not less than 30 percent water of crystallization
UN 3349 - Pyrethroid pesticide, solid, toxic
UN 1345 - Rubber scrap or shoddy, powdered or granulated, not exceeding 840 microns and rubber contend exceeding 45%
UN 2678 - Rubidium hydroxide
UN 3283 - Selenium compound, solid, n.o.s
UN 2657 - Selenium disulfide
UN 3192 - Self-heating solid, corrosive, inorganic, n.o.s.
UN 3126 - Self-heating solid, corrosive, organic, n.o.s
UN 3190 - Self-heating solid, inorganic, n.o.s
UN 3088 - Self-heating solid, organic, n.o.s
UN 3191 - Self-heating solid, toxic, inorganic, n.o.s.
UN 3128 - Self-heating solid, toxic, organic, n.o.s
UN 1683 - Silver arsenite
UN 1684 - Silver cyanide
UN 1493 - Silver nitrate
UN 2835 - Sodium aluminum hydride
UN 2863 - Sodium ammonium vanadate
UN 1685 - Sodium arsenate
UN 2027 - Sodium arsenite, solid
UN 1494 - Sodium bromate
UN 1688 - Sodium cacodylate
UN 3378 - Sodium carbonate peroxyhydrate
UN 1495 - Sodium chlorate
UN 1496 - Sodium chlorite
UN 1384 - Sodium dithionite or Sodium hydrosulfite
UN 2439 - Sodium hydrogendifluoride
UN 2318 - Sodium hydrosulfide, with less than 25 percent water of crystallization
UN 1823 - Sodium hydroxide, solid
UN 1431 - Sodium methylate
UN 1825 - Sodium monoxide
UN 2567 - Sodium pentachlorophenate
UN 1502 - Sodium perchlorate
UN 1503 - Sodium permanganate
UN 3247 - Sodium peroxoborate, anhydrous
UN 1385 - Sodium sulfide, anhydrous or Sodium sulfide with less than 30 percent water of crystallization
UN 1849 - Sodium sulfide, hydrated with not less than 30 percent water
UN 3244 - Solids containing corrosive liquid, n.o.s.
UN 3175 - Solids containing flammable liquid, n.o.s.
UN 1691 - Strontium arsenite
UN 1506 - Strontium chlorate
UN 1508 - Strontium perchlorate
UN 1509 - Strontium peroxide
UN 2779 - Substituted nitrophenol pesticides, solid, toxic
UN 1999 - Tars, liquid including road oils and cutback bitumens
UN 3448 - Tear gas substance, solid, n.o.s
UN 3284 - Tellurium compound, n.o.s
UN 3423 - Tetramethylammonium hydroxide, solid
UN 2573 - Thallium chlorate
UN 1707 - Thallium compounds, n.o.s
UN 2727 - Thallium nitrate
UN 2771 - Thiocarbamate pesticides, solid, toxic
UN 3341 - Thiourea dioxide
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 2869 - Titanium trichloride mixtures
UN 3451 - Toluidines, solid
UN 3290 - Toxic solid, corrosive, inorganic, n.o.s
UN 3535 - Toxic solid, flammable, inorganic, n.o.s
UN 3288 - Toxic solid, inorganic, n.o.s.
UN 2928 - Toxic solids, corrosive, organic, n.o.s.
UN 2930 - Toxic solids, flammable, organic, n.o.s.
UN 2811 - Toxic solids, organic, n.o.s.
UN 3086 - Toxic solids, oxidizing, n.o.s.
UN 3124 - Toxic solids, self-heating, n.o.s.
UN 2763 - Triazine pesticides, solid, toxic
UN 1839 - Trichloroacetic acid
UN 2468 - Trichloroisocyanuric acid, dry
UN 3285 - Vanadium compound, n.o.s
UN 2931 - Vanadyl sulfate
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 2261 - Xylenols, solid
UN 3452 - Xylidines, solid
UN 3417 - Xylyl bromide, solid
UN 1512 - Zinc ammonium nitrite
UN 1712 - Zinc arsenate or Zinc arsenite or Zinc arsenate and zinc arsenite mixtures
UN 1513 - Zinc chlorate
UN 1514 - Zinc nitrate
UN 1515 - Zinc permanganate
UN 1516 - Zinc peroxide
UN 1436 - Zinc powder or Zinc dust
UN 1437 - Zirconium hydride
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
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