aterials Warning Placards as described in 49 CFR 172.400 (2011/2012)
• Class 1: Explosives
• Class 2: Gases
• Class 3: Flammable Liquids
• Class 4: Flammable Solids, Spontaneous Combustible Materials, Dangerous When Wet Materials
• Class 5: Oxidizers and Organic Peroxides
• Class 6: Poison
• Class 7: Radioactive Materials
• Class 8: Corrosives
• Class 9: Miscellaneous
Class 1: Explosives
• 1.1 A detonating or otherwise maximum explosion hazard. Example: TNT
• 1.2 An explosive charge with a projection hazard Example: cannon shells, bombs
• 1.3 An explosive device described as a rapid combustion as opposed to a violent detonation. Examples: rocket motors, special fireworks, flash powders
• Certain manufactured articles that may contain component parts that are division 1.1 or 1.3 Explosives but in such limited quantities and packaged in such a way as to be considered a minor hazard.
Examples: small arms ammunition, common fireworks, such as sparklers, toy torpedoes, etc.
• Explosive material tested and found to be so insensitive that there is very little probability of accidental initiation to explosion.
Example: Construction and demolition explosives
NOTE: VERY RIGID TESTING AND APPROVAL PROCESS REQUIRED.
• Extremely insensitive explosives that do not have a mass explosion hazard and Demonstrate a negligible probability of accidental initiation or propagation.
• These materials are designated by the National Competent Authority of the country of manufacture.
* Include appropriate compatibility group letter
** Include appropriate division number and compatibility group letter
Class 2: Gases
• which is a gas at 20°C (68°F) or less
• is ignitable at 14.7 psi when in a mixture of 13 percent or less by volume with air
• has a flammable range at (14.7 psi with air of at least 12 percent regardless of the lower limit.
Examples: Propane, Acetylene, Hydrogen