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2004 ERG (Emergency Response Guidebook)

This is an online version of the 2004 ERG (Emergency Response Guidebook) which is produced by the USDOT for first responders during the initial phase of a Dangerous goods/Hazardous Materials incident. Have you ever wondered what those four digit numbers on the placards on the side of trucks and rail cars mean? Our online 2004 ERG will give you your answer.

2004 ERG Menu

Table of Water-Reactive Materials Which Produce Toxic Gases

UN#GuideName of MaterialTIH Gas(es) Produced
1162155Dimethyldichloro- silane (when spilled in water) HCl
1196155Ethyltrichlorosilane (when spilled in water) HCl
1242139Methyldichlorosilane (when spilled in water) HCl
1250155Methyltrichlorosilane (when spilled in water) HCl
1250155Methyltrichlorosilane (when spilled in water) HCl
1295139Trichlorosilane (when spilled in water) HCl
1298155Trimethylchlorosilane (when spilled in water) HCl
1298155Trimethylchlorosilane (when spilled in water) HCl
1305155Vinyltrichlorosilane (when spilled in water) HCl
1305155Vinyltrichlorosilane, inhibited (when spilled in water) HCl
1305155Vinyltrichlorosilane, stabilized (when spilled in water) HCl
1340139Phosphorus pentasulfide, free from yellow or white Phosphorous (when spilled in water) H2S
1340139Phosphorus pentasulphide, free from yellow or white Phosphorous (when spilled in water) H2S
1360139Calcium phosphide (when spilled in water) PH3
1384135Sodium dithionite (when spilled in water) H2S, SO2
1384135Sodium hydrosulfite (when spilled in water) H2S, SO2
1384135Sodium hydrosulphite (when spilled in water) H2S, SO2
1397139Aluminum phosphide (when spilled in water) PH3
1412139Lithium amide (when spilled in water) NH3
1419139Magnesium aluminum phosphide (when spilled in water) PH3
1432139Sodium phosphide (when spilled in water) PH3
1541155Acetone cyanohydrin, stabilized (when spilled in water) HCN
1680157Potassium cyanide (when spilled in water) HCN
1680157Potassium cyanide, solid (when spilled in water) HCN
1689157Sodium cyanide (when spilled in water) HCN
1689157Sodium cyanide, solid (when spilled in water) HCN
1716156Acetyl bromide (when spilled in water) HBr
1717155Acetyl chloride (when spilled in water) HCl
1724155Allyltrichlorosilane, stabilized (when spilled in water) HCl
1725137Aluminum bromide, anhydrous (when spilled in water) HBr
1726137Aluminum chloride, anhydrous (when spilled in water) HCl
1728155Amyltrichlorosilane (when spilled in water) HCl
1732157Antimony pentafluoride (when spilled in water) HF
1745144Bromine pentafluoride (when spilled in water) HF, Br2
1745144Bromine pentafluoride (when spilled on land) HF, Br2
1746144Bromine trifluoride (when spilled in water) HF, Br2
1746144Bromine trifluoride (when spilled on land) HF, Br2
1747155Butyltrichlorosilane (when spilled in water) HCl
1752156Chloroacetyl chloride (when spilled in water) HCl
1752156Chloroacetyl chloride (when spilled on land) HCl
1754137Chlorosulfonic acid (when spilled in water) HCl
1754137Chlorosulfonic acid (when spilled in water) HCl
1754137Chlorosulfonic acid (when spilled on land) HCl
1754137Chlorosulfonic acid (when spilled on land) HCl
1754137Chlorosulfonic acid and Sulfur trioxide mixture (when spilled in water) HCl
1754137Chlorosulfonic acid and Sulfur trioxide mixture (when spilled in water) HCl
1754137Chlorosulfonic acid and Sulfur trioxide mixture (when spilled on land) HCl
1754137Chlorosulfonic acid and Sulfur trioxide mixture (when spilled on land) HCl
1754137Chlorosulphonic acid (when spilled in water) HCl
1754137Chlorosulphonic acid (when spilled in water) HCl
1754137Chlorosulphonic acid (when spilled on land) HCl
1754137Chlorosulphonic acid (when spilled on land) HCl
1754137Chlorosulphonic acid and Sulphur trioxide mixture (when spilled in water) HCl
1754137Chlorosulphonic acid and Sulphur trioxide mixture (when spilled in water) HCl
1754137Chlorosulphonic acid and Sulphur trioxide mixture (when spilled on land) HCl
1754137Chlorosulphonic acid and Sulphur trioxide mixture (when spilled on land) HCl
1754137Sulfur trioxide and Chlorosulfonic acid mixture (when spilled in water) HCl
1754137Sulfur trioxide and Chlorosulfonic acid mixture (when spilled in water) HCl
1754137Sulfur trioxide and Chlorosulfonic acid mixture (when spilled on land) HCl
1754137Sulfur trioxide and Chlorosulfonic acid mixture (when spilled on land) HCl
1754137Sulphur trioxide and Chlorosulphonic acid mixture (when spilled in water) HCl
1754137Sulphur trioxide and Chlorosulphonic acid mixture (when spilled in water) HCl
1754137Sulphur trioxide and Chlorosulphonic acid mixture (when spilled on land) HCl
1754137Sulphur trioxide and Chlorosulphonic acid mixture (when spilled on land) HCl
1758137Chromium oxychloride (when spilled in water) HCl
1763156Cyclohexyl- trichlorosilane (when spilled in water) HCl
1766156Dichlorophenyl- trichlorosilane (when spilled in water) HCl
1767155Diethyldichlorosilane (when spilled in water) HCl
1769156Diphenyldichlorosilane (when spilled in water) HCl
1771156Dodecyltrichlorosilane (when spilled in water) HCl
1777137Fluorosulfonic acid (when spilled in water) HF
1777137Fluorosulfonic acid (when spilled in water) HF
1777137Fluorosulphonic acid (when spilled in water) HF
1777137Fluorosulphonic acid (when spilled in water) HF
1784156Hexyltrichlorosilane (when spilled in water) HCl
1799156Nonyltrichlorosilane (when spilled in water) HCl
1800156Octadecyl- trichlorosilane (when spilled in water) HCl
1801156Octyltrichlorosilane (when spilled in water) HCl
1804156Phenyltrichlorosilane (when spilled in water) HCl
1806137Phosphorus pentachloride (when spilled in water) HCl
1809137Phosphorus trichloride (when spilled in water) HCl
1809137Phosphorus trichloride (when spilled in water) HCl
1809137Phosphorus trichloride (when spilled on land) HCl
1809137Phosphorus trichloride (when spilled on land) HCl
1810137Phosphorus oxychloride (when spilled in water) HCl
1810137Phosphorus oxychloride (when spilled on land) HCl
1816155Propyltrichlorosilane (when spilled in water) HCl
1818157Silicon tetrachloride (when spilled in water) HCl
1828137Sulfur chlorides (when spilled in water) HCl, SO2, H2S
1828137Sulfur chlorides (when spilled on land) HCl, SO2, H2S
1828137Sulphur chlorides (when spilled in water) HCl, SO2, H2S
1828137Sulphur chlorides (when spilled on land) HCl, SO2, H2S
1834137Sulfuryl chloride (when spilled in water) HCl, SO3
1834137Sulfuryl chloride (when spilled in water) HCl, SO3
1834137Sulfuryl chloride (when spilled on land) HCl, SO3
1834137Sulfuryl chloride (when spilled on land) HCl, SO3
1834137Sulphuryl chloride (when spilled in water) HCl, SO3
1834137Sulphuryl chloride (when spilled in water) HCl, SO3
1834137Sulphuryl chloride (when spilled on land) HCl, SO3
1834137Sulphuryl chloride (when spilled on land) HCl, SO3
1836137Thionyl chloride (when spilled in water) HCl, SO2
1836137Thionyl chloride (when spilled on land) HCl, SO2
1838137Titanium tetrachloride (when spilled in water) HCl
1838137Titanium tetrachloride (when spilled on land) HCl
1898156Acetyl iodide (when spilled in water) HI
1923135Calcium dithionite (when spilled in water) H2S, SO2
1923135Calcium dithionite (when spilled in water) H2S, SO2
1923135Calcium hydrosulfite (when spilled in water) H2S, SO2
1923135Calcium hydrosulfite (when spilled in water) H2S, SO2
1923135Calcium hydrosulphite (when spilled in water) H2S, SO2
1923135Calcium hydrosulphite (when spilled in water) H2S, SO2
1931171Zinc dithionite (when spilled in water) H2S, SO2
1931171Zinc dithionite (when spilled in water) H2S, SO2
1931171Zinc hydrosulfite (when spilled in water) H2S, SO2
1931171Zinc hydrosulfite (when spilled in water) H2S, SO2
1931171Zinc hydrosulphite (when spilled in water) H2S, SO2
1931171Zinc hydrosulphite (when spilled in water) H2S, SO2
2004135Magnesium diamide (when spilled in water) NH3
2011139Magnesium phosphide (when spilled in water) PH3
2012139Potassium phosphide (when spilled in water) PH3
2013139Strontium phosphide (when spilled in water) PH3
2437156Methylphenyl- dichlorosilane (when spilled in water) HCl
2495144Iodine pentafluoride (when spilled in water) HF
2691137Phosphorus pentabromide (when spilled in water) HBr
2692157Boron tribromide (when spilled in water) HBr
2692157Boron tribromide (when spilled on land) HBr
2806138Lithium nitride (when spilled in water) NH3
2977166Radioactive material, Uranium hexafluoride, fissile (when spilled in water) HF
2977166Radioactive material, Uranium hexafluoride, fissile (when spilled in water) HF
2977166Uranium hexafluoride, fissile containing more than 1% Uranium-235 (when spilled in water) HF
2977166Uranium hexafluoride, fissile containing more than 1% Uranium-235 (when spilled in water) HF
2978166Radioactive material, Uranium hexafluoride (when spilled in water) HF
2978166Radioactive material, Uranium hexafluoride (when spilled in water) HF
2978166Radioactive material, Uranium hexafluoride, non-fissile or fissile-excepted (when spilled in water) HF
2978166Radioactive material, Uranium hexafluoride, non-fissile or fissile-excepted (when spilled in water) HF
2978166Uranium hexafluoride (when spilled in water) HF
2978166Uranium hexafluoride (when spilled in water) HF
2978166Uranium hexafluoride, fissile-excepted (when spilled in water) HF
2978166Uranium hexafluoride, fissile-excepted (when spilled in water) HF
2978166Uranium hexafluoride, low specific activity (when spilled in water) HF
2978166Uranium hexafluoride, low specific activity (when spilled in water) HF
2978166Uranium hexafluoride, non-fissile (when spilled in water) HF
2978166Uranium hexafluoride, non-fissile (when spilled in water) HF
2985155Chlorosilanes, flammable, corrosive, n.o.s. (when spilled in water) HCl
2985155Chlorosilanes, n.o.s (when spilled in water) HCl
2986155Chlorosilanes, corrosive, flammable, n.o.s. (when spilled in water) HCl
2986155Chlorosilanes, n.o.s. (when spilled in water) HCl
2987156Chlorosilanes, corrosive, n.o.s. (when spilled in water) HCl
2987156Chlorosilanes, corrosive, n.o.s. (when spilled in water) HCl
2987156Chlorosilanes, n.o.s (when spilled in water) HCl
2987156Chlorosilanes, n.o.s (when spilled in water) HCl
2988139Chlorosilanes, n.o.s. (when spilled in water) HCl
2988139Chlorosilanes, n.o.s. (when spilled in water) HCl
2988139Chlorosilanes, water-reactive, flammable, corrosive, n.o.s. (when spilled in water) HCl
2988139Chlorosilanes, water-reactive, flammable, corrosive, n.o.s. (when spilled in water) HCl
3048157Aluminum phosphide pesticide (when spilled in water) PH3
3049138Metal alkyl halides, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal alkyl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, water-reactive, n.o.s. (when spilled in water) HCl
3049138Metal aryl halides, water-reactive, n.o.s. (when spilled in water) HCl
3052135Aluminum alkyl halides (when spilled in water) HCl
3052135Aluminum alkyl halides (when spilled in water) HCl
3052135Aluminum alkyl halides (when spilled in water) HCl
3052135Aluminum alkyl halides, liquid (when spilled in water) HCl
3052135Aluminum alkyl halides, liquid (when spilled in water) HCl
3052135Aluminum alkyl halides, liquid (when spilled in water) HCl
3052135Aluminum alkyl halides, solid (when spilled in water) HCl
3052135Aluminum alkyl halides, solid (when spilled in water) HCl
3052135Aluminum alkyl halides, solid (when spilled in water) HCl
3461135Aluminum alkyl halides, solid (when spilled in water) HCl
9191143Chlorine dioxide, hydrate, frozen (when spilled in water) Cl2

Data Source for our online 2004 ERG

This information was compiled from the 2004 Emergency Response Guidebook (2004 ERG) which is produced by the U.S. Department of Transportation.

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