The Definition of Chemical Hazard

Definition of Chemical Hazard

A chemical hazard refers to any substance — solid, liquid, or gas — capable of causing harm to human health, safety, or the environment due to its inherent physical properties (such as flammability, reactivity, or corrosivity) or its toxicological effects (such as carcinogenicity, respiratory sensitization, or acute toxicity). Chemical hazards are classified and communicated through systems such as the Globally Harmonized System (GHS), which standardizes hazard classification, labeling, and Safety Data Sheet requirements to help workers understand the specific risks associated with a given substance and the controls needed to manage them safely.

Example of Chemical Hazard

A cleaning company evaluates a new industrial degreaser before purchasing it, reviewing the product's Safety Data Sheet to confirm its GHS hazard classifications, including flammability and skin corrosion warnings, and determines that additional ventilation and chemical-resistant gloves will be required before staff can begin using it.

Frequently Asked Questions: Chemical Hazard

How are chemical hazards classified under the Globally Harmonized System (GHS)?

GHS classifies chemical hazards into physical hazard categories (such as flammable, explosive, or corrosive), health hazard categories (such as acute toxicity, carcinogenicity, or respiratory sensitization), and environmental hazard categories, using standardized pictograms, signal words, and hazard statements to communicate the specific risks consistently across manufacturers and countries.

What is the difference between a physical hazard and a health hazard in chemical classification?

A physical hazard relates to a chemical's inherent properties that could cause immediate physical harm, such as fire, explosion, or corrosive damage to materials, while a health hazard relates to the biological effects a chemical can have on the human body, such as toxicity, irritation, or long-term disease risk from exposure.

What resources help workers understand the chemical hazards present in their workplace?

Safety Data Sheets, product labels, and an employer's written Hazard Communication program are the primary resources workers should have access to for understanding chemical hazards, along with required training that explains how to interpret GHS pictograms, hazard statements, and appropriate precautionary measures for the specific chemicals used on-site.