What does UN mean in hazmat?

United Nations (UN) Numbers are four-digit numbers used to identify hazardous chemicals or classes of hazardous materials worldwide. North American (NA) Numbers are identical to UN numbers. If a material does not have a UN number, it may be assigned an NA number.

What are the 6 categories of hazmat?

TYPES OF HAZARDOUS MATERIALS

• Class 1: Explosives.
• Class 2: Gases.
• Class 3: Flammable Liquids.
• Class 4: Flammable Solids.
• Class 5: Oxidizing Substances, Organic Peroxides.
• Class 6: Toxic Substances and Infectious Substances.
• Class 7: Radioactive Material.
• Class 8: Corrosives.

What is UN classification of dangerous goods?

Dangerous goods are separated into categories through a classification system is outlined by the UN Model Regulations. Each dangerous substance or article is assigned to a class. There are 9 classes of dangerous goods and the class is determined by the nature of the danger they present: Class 1: Explosives.

How many UN classification class label of hazmat are there?

nine classes
Following the UN model, the DOT divides regulated hazardous materials into nine classes, some of which are further subdivided.

What is a Class 4 explosive?

Class 4 – Flammable solids; Substances liable to spontaneous combustion; Substances which, on contact with water, emit flammable gases. Division 4.1 Flammable solids, self-reactive substances and solid desensitized explosives.

What are the 9 classes of dangerous goods?

What are the 9 classes of Dangerous Goods?

• Explosives.
• Flammable Gases.
• Flammable Liquids.
• Flammable solids.
• Oxidizing.
• Toxic & Infectious.
• Radioactive.
• Corrosives.

What are the 2 types of dangerous goods labels in use?

Dangerous goods labels

• Class 1: Explosive substances and articles.
• Class 2: Gases.
• Class 3: Flammable liquids.
• Class 4: Flammable solids and other solid explosive substances.
• Class 5: Oxidising substances and organic peroxides.

What are the 3 classification of hazard?

All hazards are assessed and categorized into three groups: biological, chemical and physical hazards.

What is a Class 5 hazmat site?

Class 5 dangerous goods are oxidizing substances and organic peroxides. There are 2 sub-divisions: Division 5.2: Organic peroxides.

What are the hazard classes in hazmat University?

4 Hazard Class 4 – Flammable Solids 1.5 Hazard Class 5 – Oxidizing Substance and Organic Peroxide 1.6 Hazard Class 6 – Poisonous/Toxic and Infectious Substance

What is the UN classification of chemical hazards?

UN Classification of Chemical Hazards UN Classification of Chemical Hazards (UN Dangerous Goods Transport Regulations) (Courtesy of AA Directions – Autumn 2006) UN Hazard Identification System With examples Explosives UN Class 1 – Explosives Gases UN Class 2.1 – Flammable Gas Hydrogen Acetylene

Where are the class numbers on a hazmat placard?

Hazmat warning placards are broken down into nine different classifications, along with their divisions. Each class number is found at the bottom of the sign, while the division number can be found in the middle. Hazard classification number — See below. UN/NA number — See above.

Which is an example of a UN hazard?

UN Hazard Identification System With examples. Explosives UN Class 1 – Explosives Gases UN Class 2.1 – Flammable Gas. Hydrogen Acetylene UN Class 2.2 – nontoxic, non flammable Compressed Gases.