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 2444 through 2505

UN#GuideName of MaterialISO
Current as of: Oct. 2, 2011
2444137Vanadium tetrachloride
2445135Lithium alkyls
2445135Lithium alkyls, liquid
2446153Nitrocresols, solid
2447136Phosphorus, white, molten
2447136White phosphorus, molten
2447136Yellow phosphorus, molten
2448133Sulfur, molten
2448133Sulphur, molten
2451122Nitrogen trifluoride
2451122Nitrogen trifluoride, compressed
2452116PEthylacetylene, stabilized
2453115Ethyl fluoride
2453115Refrigerant gas R-161
2454115Methyl fluoride
2454115Refrigerant gas R-41
2455116Methyl nitrite
2463138Aluminum hydride
2464141Beryllium nitrate
2465140Dichloroisocyanuric acid salts
2465140Dichloroisocyanuric acid, dry
2465140Sodium dichloro-s-triazinetrione
2465140Sodium dichloroisocyanurate
2466143Potassium superoxide
2467140Sodium percarbonates
2468140(mono)-(Trichloro)-tetra-(monopotassium dichloro)-penta-s-triazinetrione, dry
2468140Trichloroisocyanuric acid, dry
2469140Zinc bromate
2470152Phenylacetonitrile, liquid
2471154Osmium tetroxide
2473154Sodium arsanilate
2475157Vanadium trichloride
2477131Methyl isothiocyanateYes
2478155Isocyanate solution, flammable, poisonous, n.o.s.
2478155Isocyanate solution, flammable, toxic, n.o.s.
2478155Isocyanate solutions, n.o.s.
2478155Isocyanates, flammable, poisonous, n.o.s.
2478155Isocyanates, flammable, toxic, n.o.s.
2478155Isocyanates, n.o.s.
2480155Methyl isocyanateYes
2481155Ethyl isocyanateYes
2482155n-Propyl isocyanateYes
2483155Isopropyl isocyanateYes
2484155tert-Butyl isocyanateYes
2485155n-Butyl isocyanateYes
2486155Isobutyl isocyanateYes
2487155Phenyl isocyanateYes
2488155Cyclohexyl isocyanateYes
2490153Dichloroisopropyl ether
2491153Ethanolamine, solution
2495144Iodine pentafluoride
2496156Propionic anhydride
25011521-Aziridinyl phosphine oxide (Tris)
2501152Tri-(1-aziridinyl) phosphine oxide, solution
2501152Tris-(1-aziridinyl) phosphine oxide, solution
2502132Valeryl chloride
2503137Zirconium tetrachloride
2504159Acetylene tetrabromide
2505154Ammonium fluoride

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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