Hazardous Material Classification System

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The Workplace Hazardous Materials Information System (WHMIS) is Canada's national hazard communication standard. The key elements of the system are hazard classification, cautionary labelling of containers, the provision of (material) safety data sheets ( (M)SDSs) and worker education and training programs.

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List of Hazard Classes Physical Hazards Flammable gases Flammable aerosols Oxidizing gases Gases under pressure Flammable liquids Flammable solids Self-reactive substances and mixtures Pyrophoric liquids Pyrophoric solids Self-heating substances and mixtures Substances and mixtures which, in contact with water, emit flammable gases

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Hazardous Materials Classification There are multiple sources for identifying the DOT/IATA defined hazards of a material: Shipping papers Safety Data Sheets (SDS) Container labels and markings. It is also a good practice to search through the hazardous materials table listed in our references section.

Estimated Reading Time: 4 mins

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The marking system designed by the National Fire Protection Association identifies hazard charac­ teristics of materials at terminal and industrial sites. It uses a diamond divided into four quadrants, with each quadrant representing a different characteristic, as explained below. The risk level ratings, ranging from four (highest risk) to zero (minimum risk), are based upon protective

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017-11-21

Estimated Reading Time: 5 mins
Published: 2017-11-21
1. Explosives. Explosives meet the hazardous materials classification (Class 1) because they have the ability to produce hazardous amounts of heat, sound, smoke, gas or light.
2. Gases. Gases include compressed, liquefied, dissolved, refrigerated liquefied, aerosols, and other gases. They are defined by the hazardous materials classification (Class 2) as “substances that have a vapor pressure of 300 kPa or greater at 50°c or are completely gaseous at 20°c at standard atmospheric pressure.”
3. Flammable Liquids and Combustible Liquids. Flammable liquids or combustible liquids are volatile, and can often give off a flammable vapor. They are defined by the hazardous materials classification (Class 3) as “liquids, mixtures of liquids or liquids containing solids in solution or suspension which give off a flammable vapor, and have a flash point at temperatures not more than 60.5°C or 141°F.”
4. Flammable Solids and Spontaneously Combustible Materials. Flammable solids fit within the hazardous materials classification (Class 4) because they are highly combustible, are capable of posing serious hazards due to their volatility, combustibility, potential in causing or propagating severe conflagrations and can even cause fire through friction.
5. Oxidizers and Organic Peroxides. Oxidizers are substances that can produce oxygen. They are within the hazardous materials classification (Class 5) because the right circumstances they can contribute to the combustion of other hazardous substances, though they are not always combustible themselves.
6. Toxic Materials and Infectious Substances. Toxic materials fall under the hazardous materials classification (Class 6) because of the ability to cause serious injury or death if swallowed, inhaled or contact is made with skin.
7. Radioactive Materials. Radioactive materials are defined by hazardous materials classification as “any material containing radionuclides where both the activity concentration and the total activity exceeds certain pre-defined values.”
8. Corrosive Materials. Corrosive are substances that degrade or disintegrate other materials upon contact through a chemical reaction if leakage, or damage occurs to the surrounding materials.
9. Miscellaneous Dangerous Goods. As the name implies, miscellaneous hazardous materials classification (Class 9) are substances that present an imminent threat that is not covered within the definitions of the other 8 classes.

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The Globally Harmonized System of Classification & Labelling of Chemicals (GHS) Workplace Hazardous Materials Information System (WHMIS) 2015 is the standardized plan for sharing information about the safe use of hazardous materials in Canadian workplaces.

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The classification system for Division 6.2 Infectious Substances includes two catergories, known simply as Category A and Category B. These will be defined and discussed in more detail later in the course. The regulations that govern packaging and shipping a class 9, miscellaneous hazardous material, may also need to be reviewed by those who package and …

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WHMIS Online Training Canadian law requires that any person exposed to hazardous materials in the workplace must be trained in Workplace Hazardous Materials Information System (WHMIS). This comprehensive WHMIS 2015 course includes the new Globally Harmonized System of Classification and Labelling for chemicals (GHS) enacted in 2015.

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Class 1 - Explosive substances and articles Class 2 - Gases Class 3 - Flammable liquids Class 4 - Flammable solids Class 5 - Oxidizing substances and organic peroxides Class 6 - Toxic and infectious substances Class 7 - Radioactive material Class 8 - Corrosive substances Class 9 - Miscellaneous dangerous substances and articles

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Hazardous Materials Identification System (HMIS) is a voluntary hazard rating scheme developed by American Coatings Association (ACA) to help employers comply with workplace labeling requirements of the U.S. Occupational Safety and Health Administration's (OSHA) revised Hazard Communication Standard (HCS).

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The hazardous area classification system determines required protection techniques and methods for electrical installations in the location. Class/Division System The Class/Division/Group system is based on Article 500 of the National Electrical Code (NEC) where

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DOT Hazard Classification System The hazard class of dangerous goods/commodities is indicated either by its class (or division) number or name. Placards are used to identify the class or division of a material.

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The classification, label and (material) SDS must comply fully with the specific legislation and regulation chosen by the supplier, and not a combination of the two. A label or SDS that is compliant with the United States Hazard Communication Standard (2012) may not be sufficient for compliance in Canada.

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Hazardous Materials (hazmat) shipping is an activity that has the potential to pose significant risks. Any mistake or oversight (especially regarding DOT hazard class classification) on the part of a hazmat shipper, supply chain employee or carrier can lead to a serious accident that can endanger lives and/or cause property damage. This is why the United States’ …

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The Hazardous Materials Identification System (HMIS) is a rating system for chemical hazards developed by the American Coatings Association (ACA). It uses colors, numbers, and letters to identify and provide information about various hazards. HMIS is a registered mark owned by National Paint Coatings Association (NPCA), now known as ACA.

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Classification of Hazardous Materials: The DOT has broad authority to regulate hazardous materials that are in transport, including the discretion to determine which materials shall be classified as “hazardous”. These materials are placed in one of nine categories, based on their chemical and physical properties. Based on the classification of the material, the DOT is …

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Frequently Asked Questions

What are the classifications of hazardous materials??

The classes are part of the United Nations-based system of identifying dangerous goods, and are used within many different subsystems such as the ADR, RID, IMDG and DGR for classifying dangerous goods and hazardous materials. Class 1 contains substances and articles which pose a hazard due to explosion.

What is workplace hazardous materials information system??

Canadian law requires that any person exposed to hazardous materials in the workplace must be trained in Workplace Hazardous Materials Information System (WHMIS). This comprehensive WHMIS 2015 course includes the new Globally Harmonized System of Classification and Labelling for chemicals (GHS) enacted in 2015.

What type of hazard classification system do we use in NZ??

We use the Globally Harmonised System (GHS 7) hazard classification system in New Zealand. Hazard classifications are communicated on labels and safety data sheets including the safe way to store, use and dispose of chemicals. The GHS 7 assigns classifications to a hazardous substance based on its:

What is the North American hazardous area classification system??

North American hazardous locations classification in classes, divisions and groups. 1 Class/Division System. The Class/Division/Group system is based on Article 500 of the National Electrical Code (NEC) where. 2 Zone System. 3 Example - Hazardous Area Classification.

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