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 Isolation and Protective Action Distances
UN Number Rage
[ 1005-1082 | 1092-1582 | 1583-1752 | 1754-1834 | 1836-1953 ][ 1955-2199 | 2202-2806 | 2810-2978 | 2985-3162 | 3246-3306 ]
[ 3307-9269 ]
UN# 2985 - 3162
| Isolation and Protective Action Distances Table | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SMALL SPILLS | LARGE SPILLS | ||||||||||||
| UN# | Name of Material | First ISOLATE in all Directions | Then PROTECT Persons Downwind During- | First ISOLATE in all Directions | Then PROTECT Persons Downwind During- | ||||||||
| Day | Night | Day | Night | ||||||||||
| m | ft | km | mi | km | mi | m | ft | km | mi | km | mi | ||
|
Please see: How to use the table of initial isolation and protective action distances | |||||||||||||
| 2985 | Chlorosilanes, flammable, corrosive, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2985 | Chlorosilanes, n.o.s (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2986 | Chlorosilanes, corrosive, flammable, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2986 | Chlorosilanes, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2987 | Chlorosilanes, corrosive, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2987 | Chlorosilanes, n.o.s (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2988 | Chlorosilanes, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 2988 | Chlorosilanes, water-reactive, flammable, corrosive, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.5 | 0.3 | 150 | 500 | 1.3 | 0.8 | 3.9 | 2.4 |
| 3023 | 2-Methyl-2- hepthanethiol | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 60 | 200 | 0.5 | 0.3 | 0.8 | 0.5 |
| 3023 | tert-Octyl mercaptan | 30 | 100 | 0.1 | 0.1 | 0.1 | 0.1 | 60 | 200 | 0.5 | 0.3 | 0.8 | 0.5 |
| 3048 | Aluminum phosphide pesticide (when spilled in water) | 90 | 300 | 0.6 | 0.4 | 2.7 | 1.7 | 1000 | 3000 | 9 | 5.6 | 11+ | 7+ |
| 3049 | Metal alkyl halides, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3049 | Metal alkyl halides, water-reactive, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3049 | Metal aryl halides, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3049 | Metal aryl halides, water-reactive, n.o.s. (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3052 | Aluminum alkyl halides (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3052 | Aluminum alkyl halides, liquid (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3052 | Aluminum alkyl halides, solid (when spilled in water) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 |
| 3057 | Trifluoroacetyl chloride | 30 | 100 | 0.3 | 0.2 | 1.3 | 0.8 | 800 | 2500 | 7.8 | 4.9 | 11+ | 7+ |
| 3079 | Methacrylonitrile, inhibited | 30 | 100 | 0.1 | 0.1 | 0.3 | 0.2 | 90 | 300 | 0.8 | 0.5 | 1.6 | 1 |
| 3079 | Methacrylonitrile, stabilized | 30 | 100 | 0.1 | 0.1 | 0.3 | 0.2 | 90 | 300 | 0.8 | 0.5 | 1.6 | 1 |
| 3083 | Perchloryl fluoride | 30 | 100 | 0.2 | 0.1 | 0.6 | 0.4 | 360 | 1200 | 3.5 | 2.2 | 8.8 | 5.5 |
| 3122 | Poisonous liquid, oxidizing, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3122 | Poisonous liquid, oxidizing, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3122 | Poisonous liquid, oxidizing, n.o.s. (Inhalation Hazard Zone B) | 30 | 100 | 0.4 | 0.2 | 1.4 | 0.9 | 270 | 900 | 2.7 | 1.7 | 6.9 | 4.3 |
| 3122 | Toxic liquid, oxidizing, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3122 | Toxic liquid, oxidizing, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3122 | Toxic liquid, oxidizing, n.o.s. (Inhalation Hazard Zone B) | 30 | 100 | 0.4 | 0.2 | 1.4 | 0.9 | 270 | 900 | 2.7 | 1.7 | 6.9 | 4.3 |
| 3123 | Poisonous liquid, water-reactive, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Poisonous liquid, water-reactive, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Poisonous liquid, water-reactive, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 3123 | Poisonous liquid, which in contact with water emits flammable gases, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Poisonous liquid, which in contact with water emits flammable gases, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Poisonous liquid, which in contact with water emits flammable gases, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 3123 | Toxic liquid, water-reactive, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Toxic liquid, water-reactive, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Toxic liquid, water-reactive, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 3123 | Toxic liquid, which in contact with water emits flammable gases, n.o.s. | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Toxic liquid, which in contact with water emits flammable gases, n.o.s. (Inhalation Hazard Zone A) | 150 | 500 | 1.3 | 0.8 | 3.5 | 2.2 | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3123 | Toxic liquid, which in contact with water emits flammable gases, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.5 | 0.3 | 1.8 | 1.1 | 330 | 1100 | 3.3 | 2.1 | 7.3 | 4.6 |
| 3160 | Liquefied gas, poisonous, flammable, n.o.s. | 120 | 400 | 1.2 | 0.8 | 5.1 | 3.2 | 1000 | 3000 | 8.7 | 5.4 | 11+ | 7+ |
| 3160 | Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A) | 120 | 400 | 1.2 | 0.8 | 5.1 | 3.2 | 1000 | 3000 | 8.7 | 5.4 | 11+ | 7+ |
| 3160 | Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone B) | 30 | 100 | 0.2 | 0.2 | 1.2 | 0.8 | 420 | 1400 | 4 | 2.5 | 10.8 | 6.7 |
| 3160 | Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone C) | 30 | 100 | 0.2 | 0.1 | 0.8 | 0.5 | 240 | 800 | 2.4 | 1.5 | 6.4 | 4 |
| 3160 | Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone D) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 90 | 300 | 0.8 | 0.5 | 2.4 | 1.5 |
| 3160 | Liquefied gas, toxic, flammable, n.o.s. | 120 | 400 | 1.2 | 0.8 | 5.1 | 3.2 | 1000 | 3000 | 8.7 | 5.4 | 11+ | 7+ |
| 3160 | Liquefied gas, toxic, flammable, n.o.s. (Inhalation Hazard Zone A) | 120 | 400 | 1.2 | 0.8 | 5.1 | 3.2 | 1000 | 3000 | 8.7 | 5.4 | 11+ | 7+ |
| 3160 | Liquefied gas, toxic, flammable, n.o.s. (Inhalation Hazard Zone B) | 30 | 100 | 0.2 | 0.2 | 1.2 | 0.8 | 420 | 1400 | 4 | 2.5 | 10.8 | 6.7 |
| 3160 | Liquefied gas, toxic, flammable, n.o.s. (Inhalation Hazard Zone C) | 30 | 100 | 0.2 | 0.1 | 0.8 | 0.5 | 240 | 800 | 2.4 | 1.5 | 6.4 | 4 |
| 3160 | Liquefied gas, toxic, flammable, n.o.s. (Inhalation Hazard Zone D) | 30 | 100 | 0.1 | 0.1 | 0.2 | 0.1 | 90 | 300 | 0.8 | 0.5 | 2.4 | 1.5 |
| 3162 | Liquefied gas, poisonous, n.o.s. | 600 | 2000 | 5.9 | 3.7 | 11+ | 7+ | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3162 | Liquefied gas, poisonous, n.o.s. (Inhalation Hazard Zone A) | 600 | 2000 | 5.9 | 3.7 | 11+ | 7+ | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3162 | Liquefied gas, poisonous, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.4 | 0.3 | 2 | 1.3 | 800 | 2500 | 7.8 | 4.9 | 11+ | 7+ |
| 3162 | Liquefied gas, poisonous, n.o.s. (Inhalation Hazard Zone C) | 30 | 100 | 0.3 | 0.2 | 1.2 | 0.8 | 240 | 800 | 2.4 | 1.5 | 6.4 | 4 |
| 3162 | Liquefied gas, poisonous, n.o.s. (Inhalation Hazard Zone D) | 30 | 100 | 0.2 | 0.1 | 0.7 | 0.4 | 120 | 400 | 1.2 | 0.8 | 3.8 | 2.4 |
| 3162 | Liquefied gas, toxic, n.o.s. | 600 | 2000 | 5.9 | 3.7 | 11+ | 7+ | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3162 | Liquefied gas, toxic, n.o.s. (Inhalation Hazard Zone A) | 600 | 2000 | 5.9 | 3.7 | 11+ | 7+ | 1000 | 3000 | 11+ | 7+ | 11+ | 7+ |
| 3162 | Liquefied gas, toxic, n.o.s. (Inhalation Hazard Zone B) | 60 | 200 | 0.4 | 0.3 | 2 | 1.3 | 800 | 2500 | 7.8 | 4.9 | 11+ | 7+ |
| 3162 | Liquefied gas, toxic, n.o.s. (Inhalation Hazard Zone C) | 30 | 100 | 0.3 | 0.2 | 1.2 | 0.8 | 240 | 800 | 2.4 | 1.5 | 6.4 | 4 |
| 3162 | Liquefied gas, toxic, n.o.s. (Inhalation Hazard Zone D) | 30 | 100 | 0.2 | 0.1 | 0.7 | 0.4 | 120 | 400 | 1.2 | 0.8 | 3.8 | 2.4 |
UN Number Rage
[ 1005-1082 | 1092-1582 | 1583-1752 | 1754-1834 | 1836-1953 ][ 1955-2199 | 2202-2806 | 2810-2978 | 2985-3162 | 3246-3306 ]
[ 3307-9269 ]
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.
Related Resources
- Guide for Handling Household Chemicals
Things you can do to make your home safer. - USDOT Hazardous Materials Table 49 CFR 172.101
An online version of the USDOT's listing of hazardous materials from 49CFR 172.101. This table can be sorted by proper shipping name, UN/NA ID and/or by primary hazard class/division. - US DOT Hazardous Materials Transportation Placards
Hazardous materials placards (DOT placards) are required when shipping hazardous materials in the United States, Canada and Mexico. These pages provide US DOT definitions for each hazmat placard. - Chemical Database
This database focuses on the most common chemical compounds used in the home and industry.
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