Emergency Response Guidebook (ERG)

This is an online version of the 2008 Emergency Response Guidebook (ERG) 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 ERG will give you your answer.

UN Numbers 1808 through 1868

UN#GuideName of MaterialISO
Current as of: Oct. 2, 2011
1808137Phosphorus tribromide
1809137Phosphorus trichlorideYes
1809137Phosphorus trichlorideYes
1810137Phosphorus oxychlorideYes
1811154Potassium hydrogen difluoride, solid
1811154Potassium hydrogendifluoride
1812154Potassium fluoride
1812154Potassium fluoride, solid
1813154Caustic potash, dry, solid
1813154Potassium hydroxide, dry, solid
1813154Potassium hydroxide, flake
1813154Potassium hydroxide, solid
1814154Caustic potash, liquid
1814154Caustic potash, solution
1814154Potassium hydroxide, solution
1815132Propionyl chloride
1817137Pyrosulfuryl chloride
1817137Pyrosulphuryl chloride
1818157Silicon tetrachloride
1819154Sodium aluminate, solution
1823154Caustic soda, bead
1823154Caustic soda, flake
1823154Caustic soda, granular
1823154Caustic soda, solid
1823154Sodium hydroxide, bead
1823154Sodium hydroxide, dry
1823154Sodium hydroxide, flake
1823154Sodium hydroxide, granular
1823154Sodium hydroxide, solid
1824154Caustic soda, solution
1824154Sodium hydroxide, solution
1825157Sodium monoxide
1826157Nitrating acid mixture, spent
1827137Stannic chloride, anhydrous
1827137Tin tetrachloride
1828137Sulfur chloridesYes
1828137Sulphur chloridesYes
1829137Sulfur trioxide, inhibitedYes
1829137Sulfur trioxide, stabilizedYes
1829137Sulfur trioxide, uninhibitedYes
1829137Sulphur trioxide, inhibitedYes
1829137Sulphur trioxide, stabilizedYes
1829137Sulphur trioxide, uninhibitedYes
1830137Sulfuric acid
1830137Sulfuric acid, with more than 51% acid
1830137Sulphuric acid
1830137Sulphuric acid
1830137Sulphuric acid, with more than 51% acid
1831137Sulfuric acid, fumingYes
1831137Sulfuric acid, fuming, with less than 30% free Sulfur trioxide
1831137Sulfuric acid, fuming, with not less than 30% free Sulfur trioxideYes
1831137Sulphuric acid, fumingYes
1831137Sulphuric acid, fuming, with less than 30% free Sulphur trioxide
1831137Sulphuric acid, fuming, with not less than 30% free Sulphur trioxideYes
1832137Sulfuric acid, spent
1832137Sulphuric acid, spent
1833154Sulfurous acid
1833154Sulphurous acid
1834137Sulfuryl chlorideYes
1834137Sulphuryl chlorideYes
1834137Sulphuryl chlorideYes
1835153Tetramethylammonium hydroxide
1835153Tetramethylammonium hydroxide, solution
1836137Thionyl chlorideYes
1837157Thiophosphoryl chloride
1838137Titanium tetrachlorideYes
1839153Trichloroacetic acid
1840154Zinc chloride, solution
1841171Acetaldehyde ammonia
1843141Ammonium dinitro-o-cresolate
1843141Ammonium dinitro-o-cresolate, solid
1845120Carbon dioxide, solid
1845120Dry ice
1846151Carbon tetrachloride
1847153Potassium sulfide, hydrated, with not less than 30% water of crystallization
1847153Potassium sulfide, hydrated, with not less than 30% water of hydration
1847153Potassium sulphide, hydrated, with not less than 30% water of crystallization
1847153Potassium sulphide, hydrated, with not less than 30% water of hydration
1848132Propionic acid
1848132Propionic acid, with not less than 10% and less than 90% acid
1849153Sodium sulfide, hydrated, with not less than 30% water
1849153Sodium sulphide, hydrated, with not less than 30% water
1851151Medicine, liquid, poisonous, n.o.s.
1851151Medicine, liquid, toxic, n.o.s.
1854135Barium alloys, pyrophoric
1855135Calcium alloys, pyrophoric
1855135Calcium, metal and alloys, pyrophoric
1855135Calcium, pyrophoric
1856133Rags, oily
1857133Textile waste, wet
1858126Refrigerant gas R-1216
1859125Silicon tetrafluorideYes
1859125Silicon tetrafluoride, compressedYes
1860116PVinyl fluoride, stabilized
1862130Ethyl crotonate
1863128Fuel, aviation, turbine engine
1865131n-Propyl nitrate
1866127Resin solution

Data Source for our online 2008 ERG

This information was compiled from the 2008 Emergency Response Guidebook (2008 ERG) which is produced by the U.S. Department of Transportation.

(Data last updated/verified: Oct. 2, 2011)

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WARNING: These pages are for general reference and educational purposes only and MUST NOT be relied upon as a sole source to determine regulatory compliance or where matters of life and health are concerned. This site and the author do not warrant or guarantee the accuracy or the sufficiency of the information provided and do not assume any responsibility for its use.

To ensure regulatory compliance when transporting hazardous materials or dangerous goods, one must receive proper training and certification from a qualified instructor and refer to the current year's Code of Federal Regulations Title 49 (49CFR) or your country's shipping regulations. In matters regarding workplace safety, refer to current OSHA regulations (29CFR) and NIOSH guidelines or your own country's health and safety regulations. No one should ever enter into a hazardous environment without proper training from qualified instructors.

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