| CAS/UN/NA-Number | Name | Hazard Class |
|---|
| 1,1’-Diazoaminonaphthalene | Forbidden |
| UN 3159 | 1,1,1,2-Tetrafluoroethane or Refrigerant gas R 134a | 2.2 |
| UN 2831 | 1,1,1-Trichloroethane | 6.1 |
| UN 2035 | 1,1,1-Trifluoroethane or Refrigerant gas, R 143a | 2.1 |
UN 1702
CAS 630-20-6 | 1,1,2,2-Tetrachloroethane | 6.1 |
UN 2650
CAS 594-72-9 | 1,1-Dichloro-1-nitroethane | 6.1 |
| UN 2362 | 1,1-Dichloroethafne | 3 |
UN 1030
CAS 75-37-6 | 1,1-Difluoroethane or Refrigerant gas R 152a | 2.1 |
UN 1959
CAS 75-38-7 | 1,1-Difluoroethylene or Refrigerant gas R 1132a | 2.1 |
UN 2377
CAS 534-15-6 | 1,1-Dimethoxyethane | 3 |
| 1,1-Dinitroethane (dry) | Forbidden |
UN 2498
CAS 100-50-5 | 1,2,3,6-Tetrahydrobenzaldehyde | 3 |
| UN 2410 | 1,2,3,6-Tetrahydropyridine | 3 |
| 1,2,4-Butanetriol trinitrate | Forbidden |
UN 3022
CAS 106-88-7 | 1,2-Butylene oxide, stabilized | 3 |
| UN 2372 | 1,2-Di-(dimethylamino)ethane | 3 |
| 1,2-Diazidoethane | Forbidden |
| UN 2648 | 1,2-Dibromobutan-3-one | 6.1 |
| 1,2-Dibromoethane, see Ethylene dibromide | |
UN 1958
CAS 76-14-2 | 1,2-Dichloro-1,1,2,2- tetrafluoroethane or Refrigerant gas R 114 | 2.2 |
| 1,2-Dichloroethane, see Ethylene dichloride | |
UN 1150
CAS 156-59-2 | 1,2-Dichloroethylene | 3 |
UN 1279
CAS 78-87-5 | 1,2-Dichloropropane | 3 |
UN 2252
CAS 110-71-4 | 1,2-Dimethoxyethane | 3 |
| 1,2-Dinitroethane | Forbidden |
| UN 2752 | 1,2-Epoxy-3-ethoxypropane | 3 |
| UN 2258 | 1,2-Propylenediamine | 8 |
| 1,3,2-Benzodioxaborole | |
| 1,3,5-Trimethyl-2,4,6-trinitrobenzene | Forbidden |
UN 2325
CAS 108-67-8 | 1,3,5-Trimethylbenzene | 3 |
| 1,3,5-Trinitronaphthalene | Forbidden |
| 1,3-Diazopropane | Forbidden |
| UN 2649 | 1,3-Dichloroacetone | 6.1 |
UN 2750
CAS 96-23-1 | 1,3-Dichloropropanol-2 | 6.1 |
| UN 2379 | 1,3-Dimethylbutylamine | 3 |
| 1,3-Dinitro-4,5-dinitrosobenzene | Forbidden |
| 1,3-Dinitro-5,5-dimethyl hydantoin | Forbidden |
UN 2716
CAS 110-65-6 | 1,4-Butynediol | 6.1 |
| 1,4-Dinitro-1,1,4,4-tetramethylolbutanetetranitrate (dry) | Forbidden |
UN 2518
CAS 4904-61-4 | 1,5,9-Cyclododecatriene | 6.1 |
| 1,7-Octadine-3,5-diyne-1,8-dimethoxy-9-octadecynoic acid | Forbidden |
| 1,8-Dihydroxy-2,4,5,7-tetranitroanthraquinone (chrysamminic acid) | Forbidden |
| 1,9-Dinitroxy pentamethylene-2,4, 6,8-tetramine (dry) | Forbidden |
| 1-Aziridinylphosphine oxide-(tris), see Tris-(1-aziridinyl) phosphine oxide, solution | |
UN 2688
CAS 109-70-6 | 1-Bromo-3-chloropropane | 6.1 |
| UN 2341 | 1-Bromo-3-methylbutane | 3 |
| 1-Bromo-3-nitrobenzene (unstable at 56 degrees C) | Forbidden |
UN 1126
CAS 109-65-9 | 1-Bromobutane | 3 |
UN 2517
CAS 75-68-3 | 1-Chloro-1,1-difluoroethane or Refrigerant gas R 142b | 2.1 |
| UN 1021 | 1-Chloro-1,2,2,2-tetrafluoroethaneor Refrigerant gas R 124 | 2.2 |
| UN 1983 | 1-Chloro-2,2,2-trifluoroethane or Refrigerant gas R 133a | 2.2 |
UN 1278
CAS 540-54-5 | 1-Chloropropane | 3 |
| UN 2386 | 1-Ethylpiperidine | 3 |
| UN 2370 | 1-Hexene | 3 |
| UN 0508 | 1-Hydroxybenzotriazole, anhydrous, dry or wetted with less than 20 percent water, by mass | 1.3C |
| UN 3474 | 1-Hydroxybenzotriazole, monohydrate | 4.1 |
UN 3092
CAS 107-98-2 | 1-Methoxy-2-propanol | 3 |
| UN 2399 | 1-Methylpiperidine | 3 |
| 1-Nitrohydantoin | Forbidden |
| UN 1108 | 1-Pentene (n-amylene) | 3 |
| UN 2705 | 1-Pentol | 8 |
| UN 0504 | 1H-Tetrazole | 1.1D |