Identify flammable liquids using WHMIS labels and SDSs
Recognize fire, vapour, and health hazards
Apply safe handling and storage procedures
Respond safely to spills and fire emergencies
Flammable liquids like gasoline, solvents, paint thinners, and alcohol-based cleaners are essential components of daily work across Canadian warehouses, labs, and maintenance shops. However, because they are so common, it is easy to become complacent. The true danger of these liquids isn't just the fluid itself, but the invisible vapours they release into the air during normal use, fluid transfer, or from an open container.
Under WHMIS guidelines, workers must evaluate a chemical's flash point—the lowest temperature at which it releases enough vapour to ignite. Vapours with low flash points can silently spread across a room, sink into low spots, travel along floors, and spark a massive fire from an ignition source located far away from the container itself. Beyond fire, these vapours present severe health risks; breathing them in causes headaches, dizziness, or respiratory tract irritation.
To mitigate these risks, this course outlines critical physical controls. When transferring liquids, containers must be grounded or bonded to eliminate the risk of static electricity discharges. Flammable liquids must always be kept in approved, clearly labelled containers and stored safely inside designated fire cabinets away from incompatible materials. Housekeeping is also a pillar of safety: rags soaked in solvents must be disposed of in approved, sealed bins to prevent spontaneous ignition. Finally, we review emergency response frameworks, detailing how to safely contain a localized spill using spill kits, when to use a fire extinguisher, and how to enact a rapid site evacuation plan.
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The flash point is the lowest temperature at which a liquid releases a high enough concentration of vapour to ignite if it encounters an ignition source. The lower the flash point, the more hazardous and easily ignitable the product is.
Pouring a flammable liquid can generate static electricity. Grounding and bonding physically connects the containers together and links them to the earth, safely dissipating static charges before they can create a spark and trigger an explosion.
Absolutely not. Flammable liquids must only be stored and transferred using approved containers specifically manufactured for chemical use. Never use food or beverage containers, as this drastically increases the risk of accidental ingestion or chemical degradation of the plastic.
They must be placed in designated, approved self-closing waste containers. Leaving contaminated rags scattered or tossing them into standard trash cans creates a severe fire hazard due to trapped vapour accumulation.
Alert nearby workers right away to keep them clear of the zone. If it is safe to do so, eliminate all surrounding ignition sources and utilize your workplace spill kit to contain the liquid, provided you have been trained to do so.
Disclaimer: This training provides a general overview of flammable liquids safety requirements commonly found within Canadian occupational health and safety regulations, Workplace Hazardous Materials Information System (WHMIS) requirements, and applicable fire safety standards. Requirements may vary by province or territory and by industry. This course is for informational purposes only and does not replace site-specific training, hazard assessments, emergency response procedures, or employer responsibilities required under applicable Canadian occupational health and safety legislation. Always consult your supervisor and qualified safety personnel to ensure compliance with current regulatory requirements.