49 CFR 172 Special Provision 1 (Numeric Codes)

These provisions are multi-modal and apply to bulk and non-bulk packagings.

Code	1
Description	This material is poisonous by inhalation (see §171.8 of this subchapter) in Hazard Zone A (see §173.116(a) or §173.133(a) of this subchapter), and must be described as an inhalation hazard under the provisions of this subchapter.
HazMat with this Code	UN 1092 - Acrolein, stabilized UN 3516 - Adsorbed gas, toxic, corrosive, n.o.s. Inhalation hazard zone A UN 3517 - Adsorbed gas, toxic, flammable, corrosive, n.o.s. Inhalation hazard zone A UN 3514 - Adsorbed gas, toxic, flammable, n.o.s. Inhalation hazard zone A UN 3512 - Adsorbed gas, toxic, n.o.s. Inhalation hazard zone A UN 3518 - Adsorbed gas, toxic, oxidizing, corrosive, n.o.s. Inhalation hazard zone A UN 3515 - Adsorbed gas, toxic, oxidizing, n.o.s. Inhalation hazard zone A UN 2188 - Arsine UN 3522 - Arsine, adsorbed UN 1744 - Bromine UN 1745 - Bromine pentafluoride UN 2548 - Chlorine pentafluoride UN 3304 - Compressed gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone A UN 3305 - Compressed gas, toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone A UN 1953 - Compressed gas, toxic, flammable, n.o.s. Inhalation hazard Zone A UN 1955 - Compressed gas, toxic, n.o.s. Inhalation Hazard Zone A UN 3306 - Compressed gas, toxic, oxdizing, corrosive, n.o.s. Inhalation Hazard Zone A UN 3303 - Compressed gas, toxic, oxidizing, n.o.s. Inhalation Hazard Zone A UN 1589 - Cyanogen chloride, stabilized UN 1911 - Diborane UN 1067 - Dinitrogen tetroxide UN 2481 - Ethyl isocyanate UN 1185 - Ethyleneimine, stabilized UN 1045 - Fluorine, compressed UN 1051 - Hydrogen cyanide, stabilized with less than 3 percent water UN 3526 - Hydrogen selenide, adsorbed UN 2202 - Hydrogen selenide, anhydrous UN 3355 - Insecticide gases, toxic, flammable, n.o.s. Inhalation hazard Zone A UN 1994 - Iron pentacarbonyl UN 2486 - Isobutyl isocyanate UN 2483 - Isopropyl isocyanate UN 3308 - Liquefied gas, toxic, corrosive, n.o.s. Inhalation Hazard Zone A UN 3309 - Liquefied gas, toxic, flammable, corrosive, n.o.s. Inhalation Hazard Zone A UN 3160 - Liquefied gas, toxic, flammable, n.o.s. Inhalation Hazard Zone A UN 3162 - Liquefied gas, toxic, n.o.s. Inhalation Hazard Zone A UN 3310 - Liquefied gas, toxic, oxidizing, corrosive, n.o.s. Inhalation Hazard Zone A UN 3307 - Liquefied gas, toxic, oxidizing, n.o.s. Inhalation Hazard Zone A UN 2605 - Methoxymethyl isocyanate UN 1238 - Methyl chloroformate UN 1239 - Methyl chloromethyl ether UN 2480 - Methyl isocyanate UN 1251 - Methyl vinyl ketone, stabilized UN 1244 - Methylhydrazine UN 2482 - n-Propyl isocyanate UN 1259 - Nickel carbonyl UN 1975 - Nitric oxide and dinitrogen tetroxide mixturesor Nitric oxide and nitrogen dioxide mixtures UN 1660 - Nitric oxide, compressed UN 2421 - Nitrogen trioxide UN 2190 - Oxygen difluoride, compressed UN 1380 - Pentaborane UN 1076 - Phosgene UN 2199 - Phosphine UN 3525 - Phosphine, adsorbed UN 2194 - Selenium hexafluoride UN 2676 - Stibine UN 2418 - Sulfur tetrafluoride UN 1834 - Sulfuryl chloride UN 2195 - Tellurium hexafluoride UN 2484 - tert-Butyl isocyanate UN 3389 - Toxic by inhalation liquid, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3488 - Toxic by inhalation liquid, flammable, corrosive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3383 - Toxic by inhalation liquid, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3381 - Toxic by inhalation liquid, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3387 - Toxic by inhalation liquid, oxidizing, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3490 - Toxic by inhalation liquid, water-reactive, flammable, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50 UN 3385 - Toxic by inhalation liquid, water-reactive, n.o.s. with an LC50 lower than or equal to 200 ml/m3 and saturated vapor concentration greater than or equal to 500 LC50

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