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UN/NA 1777 · Fluorosulfonic acid
UN/NA 1777 · ERG 2024 · Guide 137
- UN/NA
- 1777
- Edition
- ERG 2024
ERG 2024 lists UN/NA 1777 (Fluorosulfonic acid) under Guide 137, titled “Substances - Water-Reactive - Corrosive”.
Material name
1777 on a placard, orange panel or shipping paper
It can stand for either of two ERG 2024 entries: “Fluorosulfonic acid” and “Fluorosulphonic acid”. Both use Guide 137, so the number alone is enough to find the guide. On a numbered orange panel, 1777 is the lower number (how to read an orange panel).
ERG 2024 markings for 1777
1777 is highlighted in green, so ERG 2024 Table 1 (Initial Isolation and Protective Action Distances) has an entry for it: “Fluorosulfonic acid (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: HF (hydrogen fluoride). Its guide number 137 has no P.
Entries near 1777
By number (yellow pages): before 1777 come UN/NA 1774 Fire extinguisher charges, corrosive liquid (Guide 154); UN/NA 1775 Fluoroboric acid (Guide 154) and UN/NA 1776 Fluorophosphoric acid, anhydrous (Guide 154); after it, UN/NA 1778 Fluorosilicic acid (Guide 154); UN/NA 1779 Formic acid (Guide 153) and UN/NA 1780 Fumaryl chloride (Guide 156).
By name (blue pages): “Fluorosulfonic acid” comes after Fluorosilicates, n.o.s. (UN/NA 2856, Guide 151) and Fluorosilicic acid (UN/NA 1778, Guide 154) and before Fluorotoluenes (UN/NA 2388, Guide 130) and Formaldehyde, solution (corrosive) (UN/NA 2209, Guide 153).
By name (blue pages): “Fluorosulphonic acid” comes after Fluorosilicates, n.o.s. (UN/NA 2856, Guide 151) and Fluorosilicic acid (UN/NA 1778, Guide 154) and before Fluorotoluenes (UN/NA 2388, Guide 130) and Formaldehyde, solution (corrosive) (UN/NA 2209, Guide 153).
Guide 137 · Library
Guide 137 covers 32 UN/NA numbers. The 12 around 1777 in the guide’s number order: UN/NA 1725 Aluminum bromide, anhydrous; UN/NA 1726 Aluminum chloride, anhydrous; UN/NA 1736 Benzoyl chloride; UN/NA 1739 Benzyl chloroformate; UN/NA 1754 Chlorosulfonic acid (with or without sulfur trioxide); UN/NA 1758 Chromium oxychloride; UN/NA 1806 Phosphorus pentachloride; UN/NA 1807 Phosphorus pentoxide; UN/NA 1808 Phosphorus tribromide; UN/NA 1809 Phosphorus trichloride; UN/NA 1810 Phosphorus oxychloride; UN/NA 1817 Pyrosulfuryl chloride.
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.