Question: what are all the whmis symbols?
Answer: Exploding Bomb (Explosion or reactivity hazards) ... 
Flame (Fire hazard) ... 
Flame Over Circle (Oxidizing hazards) ... 
Gas Cylinder (Gases under pressure) ... 
Corrosion (Corrosive damage to metals, skin, eyes) ... 
Skull & Crossbones (Can cause death or toxicity with short exposure to small amounts)