DOT Placard: Hazard Class 1 - Explosives & Blasting Agents (1.4S) (2024)

FAQs

What is DOT Class 1 hazards? ›

For example, class 1 is explosives, which has six divisions (1.1 – 1.6). The divisions for hazard class 1 help individuals identify the type of explosive in question, such as those that have a mass explosion hazard, non-mass explosives with a projection hazard, and explosives that pose a fire hazard.

These warning diamonds relate to shipping and now also have relevance to storage. The 1 means class 1 (explosives) the 4 is the hazard type, 4 means "Substances and articles that present no significant hazard". The S and G are the compatibility groups.

Subdivision 1.4S contains substances and articles so packaged, or designed, that any hazardous effects arising from accidental functioning are confined within the package unless the package has been degraded by fire, in which case all blast or projection effects are limited to the extent that they do not significantly ...

division 1.4 consists of explosives that present a minor explosion hazard. the explosive effects are largely confined to the package and no projection of fragments of appreciable size or range is to be expected.

Hazardous Placards - Hazard Class 1 Explosive

Displaying the Division Number and Compatibility Group Letter, these are designed to meet all 49 CFR DOT Placard specifications. Examples of explosives include ammunition, fireworks, flares, primers, ignitors and air bag inflators.

Class 1.5: Products considered very insensitive, that are used as blasting agents. For use as logo or map symbology. Hazard Class 1: Class 1 hazards are explosives or any devices or chemicals that are designed to explode or combust.

DOT Hazard Classification System

Placards are used to identify the class or division of a material. The hazard class or division number must be displayed in the lower corner of a placard and is required for both primary and subsidiary hazard classes and divisions, if applicable.

(4) The letter “G” identifies proper shipping names for which one or more technical names of the hazardous material must be entered in parentheses, in association with the basic description. (See § 172.203(k).)

Class 1 dangerous goods are explosive substances and articles. There are 6 sub-divisions: Division 1.1: Substances and articles which have a mass explosion hazard. Division 1.2: Substances and articles which have a projection hazard but not a mass explosion hazard.

What is a Class 1.4 substance? ›

Class 1.4 explosives are substances and articles which present only a small hazard in the event of ignition or initiation during transport with any effects largely confined to the package. E.g., Flares, fireworks, safety cartridges.

The Class 1 label incorporates the explosive symbol, the division number (1.1, 1.2 or 1.2) and the letter which indicates the compatibility group. This group covers mass explosives such as dynamite/TNT, projection hazards such as detonating fuses and fire hazards such as flares and shotgun cartridges.

(6) The EXPLOSIVE 1.4 placard is not required for those Division 1.4 Compatibility Group S (1.4S) materials that are not required to be labeled 1.4S.

Class I locations are those in which flammable vapors and gases may be present. Class II locations are those in which combustible dust may be found. Class III locations are those which are hazardous because of the presence of easily ignitable fibers or flyings.

CLASS 1 Explosives

See §172.504(f)(2) for use of FLAMMABLe placard in place of COMBuStIBLe.

Category 1 is always the greatest level of hazard within its class. – If Category 1 is further divided, Category 1A within the same hazard class is a greater hazard than category 1B. Category 2 within the same hazard class is more hazardous than Category 3, and so on. There are a few exceptions to this rule.

Class I locations are those in which flammable vapors and gases may be present. Class II locations are those in which combustible dust may be found. Class III locations are those which are hazardous because of the presence of easily ignitable fibers or flyings.

Hazard Class 1: Class 1 hazards are explosives or any devices or chemicals that are designed to explode or combust. Class 1 explosives are illustrated by an orange placard with their designated hazard class, division number or compatibility letter displayed at the bottom. Some also feature an explosion graphic.

Class I Locations: A Class I Hazardous Location is one in which flammable gases or vapors may be present in the air in sufficient quantities to be explosive or ignitable.