Why Chemical Safety is Important

Chemical Safety Starts Before the Container Opens

A worker pours a cleaner into an unmarked bottle. Someone reaches for gloves without checking whether they resist the product. A maintenance crew opens a line without knowing what residue remains inside. None of these moments looks dramatic. Each can create an exposure with serious consequences.

Chemical safety matters because hazardous products are part of everyday work, not just laboratory experiments. Cleaners, solvents, fuels, coatings, adhesives, and process chemicals appear throughout manufacturing, construction, maintenance, and transportation. Familiarity can make their risks easy to overlook. The goal is not to fear every container. It is to understand the hazards and build controls into the job before work begins.

Why Small Exposures Deserve Attention

Chemical exposure does not always announce itself with a strong smell or an immediate burning sensation. Some effects appear quickly, while others develop after repeated exposure. A product can also present more than one hazard, such as flammability alongside harmful vapours or corrosive properties.

Risk depends on the chemical, concentration, amount, exposure route, duration, and working conditions. The same task can become more hazardous when ventilation changes, a container leaks, or work moves into an enclosed area. Treat a change in conditions as a reason to reassess, not simply carry on.

Four Routes Chemicals Can Take Into the Body

1. Inhalation

Gases, vapours, dusts, fumes, and mists can enter through breathing. Spraying, heating, grinding, or transferring a product may create airborne contaminants. A smell is not a dependable measure of exposure: some hazardous substances have little warning odour, and your sense of smell can become less reliable during exposure.

2. Skin and Eye Contact

Splatters, contaminated surfaces, and soaked clothing can bring chemicals into contact with skin or eyes. Effects may include irritation or burns, and some substances can pass through skin into the body. Protective equipment must match the hazard. A glove suitable for one solvent may offer poor protection against another.

3. Ingestion

Hand-to-mouth contact can transfer contamination from gloves, tools, or work surfaces to food and drinks. Eating in designated clean areas, washing hands appropriately, and keeping chemicals out of beverage containers help prevent this easily overlooked exposure route.

4. Injection

Chemicals can enter through punctures or be forced beneath the skin by high-pressure equipment. A high-pressure injection injury may look minor but requires urgent medical attention. Never use your hand to search for a hydraulic leak, and follow equipment isolation procedures before maintenance.

Identify, Assess, Control: Make the Process Practical

A useful chemical risk assessment connects the product to the actual task. Start by identifying what is present, where it is used, and who could be exposed. Include cleaners brought in by contractors, chemicals stored for occasional maintenance, and residues inside equipment.

Next, assess how exposure could happen. Will the task generate mist or vapour? Could the product splash during transfer? Are incompatible materials stored nearby? Could another crew enter the area? Consider routine operations, equipment failures, cleanup, and emergencies rather than assessing only the ideal version of the job.

Then select controls using the hierarchy of controls. Where feasible, eliminate the chemical or substitute a less hazardous product or process. Evaluate substitutes carefully, because replacing one hazard can introduce another. Engineering controls, such as enclosed transfer systems or properly designed local exhaust ventilation, can reduce exposure at its source.

Support these measures with procedures, training, restricted access, and appropriate housekeeping. Use suitable PPE for remaining risks. PPE is important, but it should not become the entire plan when the exposure can be prevented or controlled earlier.

Use WHMIS Information Before You Need It

Canada's Workplace Hazardous Materials Information System, or WHMIS, communicates hazardous product information through labels, safety data sheets (SDSs), and worker education and training. Recognizing a pictogram is a starting point, not a complete understanding of how to perform a task safely.

Read the label and review the relevant SDS before using an unfamiliar product. Pay particular attention to hazards, handling and storage, exposure controls, PPE, first aid, accidental releases, and incompatibilities. Keep information accessible to the people doing the work, including during an emergency.

Training should connect that information to your workplace. Workers need to know which controls apply, where emergency equipment is located, how to report a problem, and when to stop and ask for help. Follow applicable workplace procedures and jurisdiction-specific requirements.

Choose Protection for the Product and the Task

“Wear gloves” is not specific enough. Glove material, chemical concentration, contact time, and manufacturer compatibility information all matter. Eye protection must suit the splash or impact hazard; a face shield may supplement, rather than replace, appropriate eye protection.

If respiratory protection is needed, selection belongs within a proper respiratory protection program. Depending on the equipment and task, this includes training, fit testing, maintenance, and cartridge or filter selection. A dust mask is not a universal solution for chemical vapours. Ask a qualified person when the requirements are unclear.

Prepare for the Moment Something Goes Wrong

A spill is the wrong time to discover that nobody knows the response procedure. Establish how to raise the alarm, isolate an area, obtain medical assistance, and reach the people authorized to respond. Spill supplies must be appropriate for the chemicals and intended responders.

Workers should not attempt an unfamiliar cleanup just because a spill looks small. The product, atmosphere, and available controls determine the danger. Follow the SDS and site emergency plan, and keep untrained personnel clear. Where emergency eyewash or shower equipment is required, make sure access is unobstructed and workers understand its use.

Build Chemical Safety Into Everyday Work

Strong chemical safety habits are visible in ordinary decisions: checking a label, closing a container, replacing damaged PPE, and reporting a ventilation problem. Supervisors reinforce those habits by making information available and giving workers time to pause when conditions change.

Before the next task, ask: What is the hazard? How could exposure happen? Which controls are in place? What will we do if something goes wrong? Clear answers turn chemical safety from a poster on the wall into a working part of your operation.