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.

Table of Isolation and Protective Action Distances

UN# 1583 - 1752

Isolation and Protective Action Distances Table
UN#Name of MaterialFirst ISOLATE in all DirectionsThen PROTECT Persons Downwind During-First ISOLATE in all DirectionsThen PROTECT Persons Downwind During-

Please see: How to use the table of initial isolation and protective action distances

Current as of: Oct. 2, 2011

1583Chloropicrin mixture, n.o.s.301000.40.310.61505001.
1589Cyanogen chloride, stabilized1003000.
1595Dimethyl sulfate301000.
1595Dimethyl sulphate301000.
1605Ethylene dibromide301000.
1612Hexaethyl tetraphosphate and compressed gas mixture1003000.
1613Hydrocyanic acid, aqueous solution, with not more than 20% Hydrogen cyanide301000.
1613Hydrogen cyanide, aqueous solution, with not more than 20% Hydrogen cyanide301000.
1647Ethylene dibromide and Methyl bromide mixture, liquid301000.
1647Methyl bromide and Ethylene dibromide mixture, liquid301000.
1660Nitric oxide301000.
1660Nitric oxide, compressed301000.
1670Perchloromethyl mercaptan301000.
1680Potassium cyanide301000.
1680Potassium cyanide, solid301000.
1689Sodium cyanide301000.
1689Sodium cyanide, solid301000.
1695Chloroacetone, stabilized301000.
1716Acetyl bromide301000.
1717Acetyl chloride301000.
1722Allyl chlorocarbonate1003001.
1722Allyl chloroformate1003001.
1724Allyltrichlorosilane, stabilized301000.
1725Aluminum bromide, anhydrous301000.
1726Aluminum chloride, anhydrous301000.
1732Antimony pentafluoride301000.
1741Boron trichloride301000.
1741Boron trichloride301000.
1744Bromine, solution602000.
1744Bromine, solution602000.
1744Bromine, solution301000.
1745Bromine pentafluoride301000.
1745Bromine pentafluoride301000.
1746Bromine trifluoride301000.
1746Bromine trifluoride301000.
1749Chlorine trifluoride602000.
1752Chloroacetyl chloride301000.
1752Chloroacetyl chloride301000.

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)

Related Resources


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.

Citing this page

If you need to cite this page, you can copy this text: