Hazora · Library
UN/NA 2691 · Phosphorus pentabromide
UN/NA 2691 · ERG 2024 · Guide 137
- UN/NA
- 2691
- Edition
- ERG 2024
ERG 2024 lists UN/NA 2691 (Phosphorus pentabromide) under Guide 137, titled “Substances - Water-Reactive - Corrosive”.
Material name
2691 on a placard, orange panel or shipping paper
It points to the ERG 2024 entry “Phosphorus pentabromide” and to Guide 137. On a numbered orange panel, 2691 is the lower number (how to read an orange panel).
ERG 2024 markings for 2691
2691 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Phosphorus pentabromide (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: HBr (hydrogen bromide). Its guide number 137 has no P.
Entries near 2691
By number (yellow pages): before 2691 come UN/NA 2688 1-Bromo-3-chloropropane (Guide 159); UN/NA 2689 Glycerol alpha-monochlorohydrin (Guide 153) and UN/NA 2690 N,n-Butylimidazole (Guide 152); after it, UN/NA 2692 Boron tribromide (Guide 157); UN/NA 2693 Bisulfites, aqueous solution, n.o.s. (Guide 154) and UN/NA 2698 Tetrahydrophthalic anhydrides (Guide 156).
By name (blue pages): “Phosphorus pentabromide” comes after Phosphorus oxybromide, solid (UN/NA 1939, Guide 137) and Phosphorus oxychloride (UN/NA 1810, Guide 137) and before Phosphorus pentachloride (UN/NA 1806, Guide 137) and Phosphorus pentafluoride (UN/NA 2198, Guide 125).
Other names starting with “Phosphorus”: Phosphorus heptasulphide, free from yellow and white phosphorus (UN/NA 1339, Guide 139); Phosphorus oxybromide, molten (UN/NA 2576, Guide 137); Phosphorus pentafluoride, adsorbed (UN/NA 3524, Guide 173); Phosphorus pentasulfide, free from yellow and white phosphorus (UN/NA 1340, Guide 139); Phosphorus pentoxide (UN/NA 1807, Guide 137) and Phosphorus sesquisulfide, free from yellow and white phosphorus (UN/NA 1341, Guide 139).
Guide 137 · Library
Guide 137 covers 32 UN/NA numbers. The 12 around 2691 in the guide’s number order: UN/NA 1715 Acetic anhydride; UN/NA 1725 Aluminum bromide, anhydrous; UN/NA 1726 Aluminum chloride, anhydrous; UN/NA 1838 Titanium tetrachloride; UN/NA 1939 Phosphorus oxybromide, solid; UN/NA 2443 Vanadium oxytrichloride; UN/NA 2444 Vanadium tetrachloride; UN/NA 2503 Zirconium tetrachloride; UN/NA 2576 Phosphorus oxybromide, molten; UN/NA 2798 Benzene phosphorus dichloride; UN/NA 2799 Benzene phosphorus thiodichloride; UN/NA 9206 Methyl phosphonic dichloride.
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.