Chemical Hazards: Substances, Dust, Fumes and Asbestos
Routes of exposure, hazardous products and process-generated contaminants.
How to prepare for Working Safely
Build a simple worker-level sequence: notice the real hazard, identify exposure and harm, use the strongest available control, and report or escalate weakness.
Core concepts
Concept 1
Chemicals can enter through inhalation, skin or eye contact, ingestion or injection.
Exam cue: Identify the substance, process, route and people exposed.
Concept 2
Dust, fumes, vapours and mists may be generated by work even when no hazardous product container is present.
Exam cue: Use current labels, safety information and workplace controls.
Concept 3
Substitution, enclosure, local exhaust ventilation, safe storage and hygiene control exposure at source.
Risk pitfalls and guardrails
Assuming a familiar or natural substance is harmless.
Guardrail: Do not normalise a familiar hazard or replace a stronger source control with a warning, procedure or PPE alone.
Sweeping hazardous dust into the air.
Guardrail: Do not normalise a familiar hazard or replace a stronger source control with a warning, procedure or PPE alone.
Memory anchors
Route Shapes Control
Inhalation, skin, ingestion and injection need different barriers.
Process Can Create Hazard
Cutting, heating and spraying can generate contaminants.
Substitute Before Mask
Choose a safer material or process before PPE.
Capture at Source
Enclose or extract contamination where it is produced.
Asbestos Means Stop
Do not disturb suspected material; follow the controlled process.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which is a route by which a chemical can enter the body?
A product splashes onto a worker's forearm. Which exposure route is present?
What is a process-generated contaminant?
Stone is cut dry and a visible dust cloud forms. What is a strong first control?
What information should be checked before using a hazardous product?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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