Bulging or leaking can
Foul odor (though botulism toxin is odorless—so don’t rely on smell alone)
Spurting liquid upon opening
If you suspect botulism:
Do not taste
Seal the can in a plastic bag
Dispose of it safely (or contact local health authorities)
Botulism is life-threatening—even a small amount of toxin can be fatal.
8. How Storage Affects Safety
Even properly canned tomatoes can spoil if stored incorrectly. To prevent issues:
Keep cans in a cool, dry, dark place (ideally below 75°F / 24°C)
Avoid areas near stoves, radiators, or sunny windows
Never store cans in damp basements or garages where temperatures fluctuate
Heat accelerates chemical reactions and can weaken seals, inviting contamination.
9. What to Do If You See Suspicious BubblesStop—don’t pour or taste.
Inspect: Check for bulging, rust, dents, or leaks.
Smell: Sniff cautiously from a distance.
Observe: Look for foam, cloudiness, or discoloration.
When uncertain, discard. It’s never worth the risk.
10. Smart Shopping & Storage Habits
Prevent problems before they start:
Buy from reputable brands and retailers
Check expiration dates and avoid dented, swollen, or rusty cans
Rotate your pantry stock (“first in, first out”)
