How do you know if Ketchup (opened) has gone bad?

Ketchup (opened) has likely gone bad if you notice mould around the rim, darkening colour; sour or fermented smell; watery separation or fizzing. When in doubt, throw it out.

How long does opened Ketchup (opened) last in the fridge?

Opened Ketchup (opened) lasts 6–9 months refrigerated.

How Long Does Ketchup (Opened) Last?

Ketchup (Opened) keeps 6–9 months in the refrigerator after opening, according to cited USDA/FDA storage references.

2 cited USDA/FDA/FSIS sources
Editorial review · Verified June 2026

Only storage locations with source-backed entries are shown; a missing freezer or pantry card means FoodLasts does not have a supported value.
Unopened and after-opening tabs are split because the source data has separate entries.

Based on USDA/FSIS guidance:

Refrigerate opened condiments such as mayonnaise and salad dressings; cold storage slows spoilage after opening.

Source

A little watery separation is normal — just stir or shake. Discard ketchup that smells fermented or shows mould.

How to tell if it's gone bad

Look:Mould around the rim, darkening colour
Smell:Sour or fermented smell
Texture:Watery separation or fizzing

When in doubt, throw it out. If Ketchup (Opened) smells, looks, or feels off — discard it. Food poisoning is not worth the risk.

Storage tips

Refrigerate ketchup after opening for the best colour and flavour, and wipe the cap so dried residue does not harbour mould.

Is it still good?

Enter when you bought or opened it and where it's stored.

Common questions

How long does opened Ketchup (opened) last in the fridge?: Opened Ketchup (opened) lasts 6–9 months refrigerated.

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