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# 1955 - 2199

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

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

Current as of: Oct. 2, 2011

1955Compressed gas, poisonous, n.o.s.1003000.50.32.11.380025004.42.78.95.6
1955Compressed gas, poisonous, n.o.s.1003000.50.32.11.380025004.42.78.95.6
1955Compressed gas, poisonous, n.o.s.301000.20.10.80.540012501.91.24.83
1955Compressed gas, poisonous, n.o.s.301000.10.10.40.220060010.63.22
1955Compressed gas, poisonous, n.o.s.301000.10.10.20.11505000.70.52.71.7
1955Compressed gas, toxic, n.o.s.1003000.50.32.11.380025004.42.78.95.6
1955Compressed gas, toxic, n.o.s.1003000.50.32.11.380025004.42.78.95.6
1955Compressed gas, toxic, n.o.s.301000.20.10.80.540012501.91.24.83
1955Compressed gas, toxic, n.o.s.301000.10.10.40.220060010.63.22
1955Compressed gas, toxic, n.o.s.301000.10.10.20.11505000.70.52.71.7
1955Organic phosphate compound mixed with compressed gas1003001.00.73.42.150015004.42.79.66
1955Organic phosphate mixed with compressed gas1003001.00.73.42.150015004.42.79.66
1955Organic phosphorus compound mixed with compressed gas1003001.00.73.42.150015004.42.79.66
1967Insecticide gas, poisonous, n.o.s.1003001.00.73.42.150015004.42.79.66
1967Insecticide gas, toxic, n.o.s.1003001.00.73.42.150015004.42.79.66
1967Parathion and compressed gas mixture1003001.00.73.42.150015004.42.79.66
1975Dinitrogen tetroxide and Nitric oxide mixture301000.10.10.60.41003000.60.42.21.4
1975Nitric oxide and Dinitrogen tetroxide mixture301000.10.10.60.41003000.60.42.21.4
1975Nitric oxide and Nitrogen dioxide mixture301000.10.10.60.41003000.60.42.21.4
1975Nitric oxide and Nitrogen tetroxide mixture301000.10.10.60.41003000.60.42.21.4
1975Nitrogen dioxide and Nitric oxide mixture301000.10.10.60.41003000.60.42.21.4
1975Nitrogen tetroxide and Nitric oxide mixture301000.10.10.60.41003000.60.42.21.4
1994Iron pentacarbonyl1003000.90.62.11.350015005.53.58.95.5
1994Iron pentacarbonyl1003000.90.62.11.350015005.53.58.95.5
2004Magnesium diamide301000.10.10.40.2602000.60.42.31.5
2011Magnesium phosphide602000.40.31.6150015004.8311+7+
2012Potassium phosphide301000.30.21.20.740012503.129.45.9
2013Strontium phosphide301000.30.21.10.7400125031.99.45.9
2032Nitric acid, fuming301000.10.10.30.21505000.60.41.10.7
2032Nitric acid, red fuming301000.10.10.30.21505000.60.41.10.7
2186Hydrogen chloride, refrigerated liquid301000.10.10.40.250015002.81.710.26.3
2188Arsine2006001.10.742.51000300074.411+7+
2188SA40012502.01.35.53.4100030009.25.711+7+
2189Dichlorosilane301000.20.110.680025004.22.610.36.4
2190Oxygen difluoride80025005.33.311+7+1000300011+7+11+7+
2190Oxygen difluoride, compressed80025005.33.311+7+1000300011+7+11+7+
2191Sulfuryl fluoride301000.10.10.50.330010001.71.14.93.1
2191Sulphuryl fluoride301000.10.10.50.330010001.71.14.93.1
2192Germane301000.20.10.80.51505000.90.52.81.8
2194Selenium hexafluoride602000.40.31.91.250015002.91.86.44
2195Tellurium hexafluoride2006001.20.84.32.7100030009.45.911+7+
2196Tungsten hexafluoride301000.20.10.80.515050010.62.91.8
2197Hydrogen iodide, anhydrous301000.10.10.40.215050010.63.22
2198Phosphorus pentafluoride301000.20.21.10.72006001.30.83.82.4
2198Phosphorus pentafluoride, compressed301000.20.21.10.72006001.30.83.82.4
2199Phosphine1003000.60.42.51.580025004.42.78.95.6

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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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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