DOT Placards

Department of Transportation (DOTU.S. Department of Transportation (www.transportation.gov).) placards are displayed on vehicles carrying hazardous materials to indicate the hazard class and division of the material being transported. (Labels are very similar to placards in design; however, they are smaller and placed on individual containers rather than vehicles.)

A sample placard for gasoline, which includes UN/NA number 1203 in the center of the placard.CAMEO 365betÓéÀÖ' chemical datasheets and UN/NA datasheets include placard and label information from the Hazmat Table (49 CFRCode of Federal Regulations (www.govinfo.gov/app/collection/cfr/). 172.101). Note that these are just representative placards, and that there are variations in the placards that may be displayed on vehicles. For instance, the chemical's UN/NA numberUnited Nations-North American number. (Also UN number or DOT number.) Four-digit number identifying an individual chemical or group of chemicals with similar characteristics. Required on shipping papers; often shown on placards. The four-digit number is often preceded by UN (such as UN1219). is often shown on the placard along with the hazard classOne of nine categories of hazardous materials (used in DOT placards). The hazard class indicates the most important hazard of a given material (such as Explosives or Poison Gas). While some materials meet the criteria for more than one class, each material is assigned just one class./division symbols and numbers.

Some representative placards are shown below for each hazard class and division. This information comes from the 2024 Emergency Response Guidebook (ERG).

ERG Initial Response Guide Numbers: Until you can identify a chemical by name or UN/NA number, the ERG provides an initial response guide (also known as an orange page) assignment based on the placard. These initial response guides provide the most significant risk and/or hazard information for each type of placard. Below, the initial response guides are shown in a circle to the right of the placards; click on the icon to go directly to the response guide in CAMEO 365betÓéÀÖ. However, once you have better identification for a chemical, switch to the chemical's specific ERG response guide number. (The response guides are available in CAMEO 365betÓéÀÖ as part of the UN/NA datasheets.)

Class 1: Explosives

±·´Ç³Ù±ð:ÌýIn the Class 1 placard examples below, when required, * is where the Compatibility Group letter goes and ** is where the division number goes.

Divisions 1.1, 1.2, and 1.3
Division 1.1 - Explosives which have a mass explosionA chemical or physical process in which the rate at which energy is being generated exceeds its ability to escape to its surrounding environment. The hazards of an explosion can include a shock wave (especially near the point of explosion) and projectiles generated by the shock wave. hazard
Division 1.2 - Explosives which have a projection hazard (but NOT a mass explosion hazard)
Division 1.3 - Explosives which have a fire hazardA hazard category that includes chemicals described as flammable, combustible liquid, pyrophoric, or oxidizers (as defined by 29 CFR 1910.1200). AND either a minor blast hazard or a minor projection hazard or both (but NOT a mass explosion hazard)

Sample placard for divisions 1.1, 1.2, and 1.3.Sample placard for divisions 1.1, 1.2, and 1.3.Click to go to ERG initial response guide 112. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 1.4:
Explosives which present no significant blast hazard

Sample placard for division 1.4.Sample placard for division 1.4.Click to go to ERG initial response guide 114. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 1.5:
Very insensitive explosives with a mass explosion hazard

Sample placard for division 1.5.Sample placard for division 1.5.Click to go to ERG initial response guide 112. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 1.6:
Extremely insensitive articles which do NOT have a mass explosion hazard

Sample placard for division 1.6.Sample placard for division 1.6.Click to go to ERG initial response guide 114. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 2: Gases

Division 2.1: Flammable gas

Sample placard for division 2.1.Sample placard for division 2.1.Sample placard for division 2.1.Click to go to ERG initial response guide 118. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 2.2: Nonflammable, non-poisonous gas

Sample placard for division 2.2.Sample placard for division 2.2.Sample placard for division 2.2.Click to go to ERG initial response guide 120. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 2.3: Poisonous gas

Sample placard for division 2.3.Inhalation Hazard (rectangular) placard.Sample placard for division 2.3.Click to go to ERG initial response guide 123. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Oxygen

Sample placard for oxygen.Sample placard for oxygen.Click to go to ERG initial response guide 122. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Anhydrous Ammonia

Sample placard for ammonia (UN number 1005).Click to go to ERG initial response guide 125. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 3: Flammable Liquids (and Combustible Liquids [U.S.])

Flammable Liquid

Sample placard for class 3.Sample placard for class 3.Sample placard for class 3.Sample placard for class 3.Click to go to ERG initial response guide 127. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Combustible Liquid (U.S.)

Sample placard for class 3.Click to go to ERG initial response guide 127. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Fuel Oil and Elevated Temperature Materials

Sample placard for class 3, with Fuel Oil marking.Indicator for materials that are transported in a heated state.Sample placard for class 3, with Gasoline marking.Indicator for materials that are transported at elevated temperatures.Click to go to ERG initial response guide 128. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 4: Flammable Solids, Spontaneously Combustible Substances, and Substances that Emit Flammable Gases on Contact with Water

Division 4.1: Flammable solid

Sample placard for division 4.1.Sample placard for division 4.1.Click to go to ERG initial response guide 134. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 4.2: Spontaneously combustible

Sample placard for division 4.2.Sample placard for division 4.2.Click to go to ERG initial response guide 136. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 4.3: Dangerous when wet

Sample placard for division 4.3.Sample placard for division 4.3.Sample placard for division 4.3.Click to go to ERG initial response guide 139. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 5: Oxidizers and Organic Peroxides

Division 5.1: Oxidizer

Sample placard for division 5.1.Sample placard for division 5.1.Click to go to ERG initial response guide 143. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 5.2: Organic Peroxide

Sample placard for division 5.2.Sample placard for division 5.2.Click to go to ERG initial response guide 148. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 6: Poisonous and Infectious Substances

Division 6.1: Poison

Sample placard for division 6.1.Sample placard for division 6.1.Sample placard for division 6.1.Sample placard for division 6.1.Click to go to ERG initial response guide 153. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Division 6.2: Infectious substance

Sample placard for division 6.2.Sample placard for division 6.2.Sample placard for division 6.2.Sample placard for division 6.2 (UN number 3373).Click to go to ERG initial response guide 158. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 7: Radioactive Materials

Class 7: Radioactive

Sample placard for class 7.Sample placard for class 7.Sample placard for class 7.Sample placard for class 7.Sample placard for class 7.Sample placard for class 7.Click to go to ERG initial response guide 163. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 8: Corrosive Materials

Class 8: Corrosive

Sample placard for class 8.Sample placard for class 8.Click to go to ERG initial response guide 153. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Class 9: Miscellaneous Hazardous Materials

Class 9: Miscellaneous hazardous materials

Sample placard for class 9.Sample placard for class 9.Click to go to ERG initial response guide 171. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Mixed Load of Hazardous Materials

These placards indicate containers or vehicles carrying two or more categories of hazardous materials, all in amounts less than the threshold specified in 49 CFR 172.504. Check labels on containers or shipping papers to identify the materials.

Sample placard for mixed load.Sample placard for mixed load.Click to go to ERG initial response guide 111. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Limited Quantities

These markings indicate packages that contain hazardous materials in only limited quantities. The placard with the Y is for air transport, the other placard is for all other modes of transport.

Sample placard for packages that contain limited quantities of hazardous materials. Air transport only.Sample placard for packages that contain limited quantities of hazardous materials.Click to go to ERG initial response guide 111. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Dangerous Goods in Excepted Quantities

These markings indicate packages that contain dangerous goods in excepted quantities. The * on the marking is where the hazard class or division goes, and the ** is where the name of the shipper or consigneePerson (or business) to whom a shipment is sent. goes (if not shown elsewhere on the package).

Sample marking for excepted quantities of dangerous goods.Click to go to ERG initial response guide 111. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Marine Pollutant

This placard indicates a container or vehicle carrying one or more materials listed as marine pollutant(s) (49 CFR 172.101 Appendix B), at concentrationThe amount of a chemical present in a given weight or volume of air. Concentration of a gas in air may be expressed in units such as parts per million (by volume) or milligrams per cubic meter.(s) high enough to be harmful to marine life.

Placard for a marine pollutant.Click to go to ERG initial response guide 171. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.

Lithium Batteries

The ERG initial response guide number for lithium metal batteries (UN3090, UN3091) is 138. The ERG initial response guide number for lithium ion batteries (UN3480, UN3481) is 147.

Placard for a lithium battery.Placard for a lithium battery.Click to go to ERG initial response guide 138. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.Click to go to ERG initial response guide 147. This should be used only until a specific response guide for the chemical can be established based on name or UN/NA number, rather than just the placard.