Hazora · Library
UN/NA 9191 · Chlorine dioxide, hydrate, frozen
UN/NA 9191 · ERG 2024 · Guide 143
- UN/NA
- 9191
- Edition
- ERG 2024
ERG 2024 lists UN/NA 9191 (Chlorine dioxide, hydrate, frozen) under Guide 143, titled “Oxidizers (Unstable)”.
Material name
9191 on a placard, orange panel or shipping paper
It points to the ERG 2024 entry “Chlorine dioxide, hydrate, frozen” and to Guide 143.
ERG 2024 markings for 9191
9191 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Chlorine dioxide, hydrate, frozen (when spilled in water)”. Hazora shows those distances in the app, not on this page. “When spilled in water” means the material produces large amounts of toxic inhalation hazard (TIH) gases when spilled in water. Table 2 (Water-Reactive Materials Which Produce Toxic Gases) lists the gas produced: Cl2 (chlorine). Its guide number 143 has no P.
Entries near 9191
By number (yellow pages): before 9191 come UN/NA 3560 Tetramethylammonium hydroxide aqueous solution with not less than 25% tetramethylammonium hydroxide (Guide 153); UN/NA 8000 Consumer commodity (Guide 171) and UN/NA 9035 Gas identification set (Guide 123); after it, UN/NA 9202 Carbon monoxide, refrigerated liquid (cryogenic liquid) (Guide 168); UN/NA 9206 Methyl phosphonic dichloride (Guide 137) and UN/NA 9260 Aluminum, molten (Guide 169).
By name (blue pages): “Chlorine dioxide, hydrate, frozen” comes after Chloric acid, aqueous solution, with not more than 10% chloric acid (UN/NA 2626, Guide 140) and Chlorine (UN/NA 1017, Guide 124) and before Chlorine pentafluoride (UN/NA 2548, Guide 124) and Chlorine trifluoride (UN/NA 1749, Guide 124).
Other names starting with “Chlorine”: Chlorine, adsorbed (UN/NA 3520, Guide 173).
Guide 143 · Library
Guide 143 covers 14 UN/NA numbers. The 12 around 9191 in the guide’s number order: UN/NA 1442 Ammonium perchlorate; UN/NA 1462 Chlorites, inorganic, n.o.s.; UN/NA 1467 Guanidine nitrate; UN/NA 1472 Lithium peroxide; UN/NA 1496 Sodium chlorite; UN/NA 1506 Strontium chlorate; UN/NA 1510 Tetranitromethane; UN/NA 1516 Zinc peroxide; UN/NA 1873 Perchloric acid, with more than 50% but not more than 72% acid; UN/NA 2015 Hydrogen peroxide, aqueous solution, stabilized, with more than 60% hydrogen peroxide; UN/NA 2466 Potassium superoxide; UN/NA 2547 Sodium superoxide.
Source: ERG 2024 (U.S. DOT PHMSA, Transport Canada, SICT Mexico), for the initial phase of a transportation incident only. Hazora is not an official ERG publication and is not affiliated with or endorsed by these or any other government agencies.